diff options
| author |   Yang Zhang <yang.z.zhang@intel.com> | 2015-08-28 09:58:54 +0800 |
|---|---|---|
| committer | Yang Zhang <yang.z.zhang@intel.com> | 2015-09-01 12:44:00 +0800 |
| commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
| tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/vgabios/vgabios.c | |
| parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) | |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/vgabios/vgabios.c')
| -rw-r--r-- | qemu/roms/vgabios/vgabios.c | 3923 |
1 files changed, 3923 insertions, 0 deletions
diff --git a/qemu/roms/vgabios/vgabios.c b/qemu/roms/vgabios/vgabios.c new file mode 100644 index 000000000..c1e312b39 --- /dev/null +++ b/qemu/roms/vgabios/vgabios.c @@ -0,0 +1,3923 @@ +// ============================================================================================ +/* + * vgabios.c + */ +// ============================================================================================ +// +// Copyright (C) 2001-2008 the LGPL VGABios developers Team +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +// ============================================================================================ +// +// This VGA Bios is specific to the plex86/bochs Emulated VGA card. +// You can NOT drive any physical vga card with it. +// +// ============================================================================================ +// +// This file contains code ripped from : +// - rombios.c of plex86 +// +// This VGA Bios contains fonts from : +// - fntcol16.zip (c) by Joseph Gil avalable at : +// ftp://ftp.simtel.net/pub/simtelnet/msdos/screen/fntcol16.zip +// These fonts are public domain +// +// This VGA Bios is based on information taken from : +// - Kevin Lawton's vga card emulation for bochs/plex86 +// - Ralf Brown's interrupts list available at http://www.cs.cmu.edu/afs/cs/user/ralf/pub/WWW/files.html +// - Finn Thogersons' VGADOC4b available at http://home.worldonline.dk/~finth/ +// - Michael Abrash's Graphics Programming Black Book +// - Francois Gervais' book "programmation des cartes graphiques cga-ega-vga" edited by sybex +// - DOSEMU 1.0.1 source code for several tables values and formulas +// +// Thanks for patches, comments and ideas to : +// - techt@pikeonline.net +// +// ============================================================================================ + +#include "vgabios.h" + +#ifdef VBE +#include "vbe.h" +#endif + +#define USE_BX_INFO + +/* Declares */ +static Bit8u read_byte(); +static Bit16u read_word(); +static void write_byte(); +static void write_word(); +static Bit8u inb(); +static Bit16u inw(); +static void outb(); +static void outw(); + +static Bit16u get_SS(); + +// Output +static void printf(); +static void unimplemented(); +static void unknown(); + +static Bit8u find_vga_entry(); + +static void memsetb(); +static void memsetw(); +static void memcpyb(); +static void memcpyw(); + +static void biosfn_set_video_mode(); +static void biosfn_set_cursor_shape(); +static void biosfn_set_cursor_pos(); +static void biosfn_get_cursor_pos(); +static void biosfn_set_active_page(); +static void biosfn_scroll(); +static void biosfn_read_char_attr(); +static void biosfn_write_char_attr(); +static void biosfn_write_char_only(); +static void biosfn_write_pixel(); +static void biosfn_read_pixel(); +static void biosfn_write_teletype(); +static void biosfn_perform_gray_scale_summing(); +static void biosfn_load_text_user_pat(); +static void biosfn_load_text_8_14_pat(); +static void biosfn_load_text_8_8_pat(); +static void biosfn_load_text_8_16_pat(); +static void biosfn_load_gfx_8_8_chars(); +static void biosfn_load_gfx_user_chars(); +static void biosfn_load_gfx_8_14_chars(); +static void biosfn_load_gfx_8_8_dd_chars(); +static void biosfn_load_gfx_8_16_chars(); +static void biosfn_get_font_info(); +static void biosfn_alternate_prtsc(); +static void biosfn_switch_video_interface(); +static void biosfn_enable_video_refresh_control(); +static void biosfn_write_string(); +static void biosfn_read_state_info(); +static void biosfn_read_video_state_size(); +static Bit16u biosfn_save_video_state(); +static Bit16u biosfn_restore_video_state(); +extern Bit8u video_save_pointer_table[]; + +// This is for compiling with gcc2 and gcc3 +#define ASM_START #asm +#define ASM_END #endasm + +ASM_START + +MACRO SET_INT_VECTOR + push ds + xor ax, ax + mov ds, ax + mov ax, ?3 + mov ?1*4, ax + mov ax, ?2 + mov ?1*4+2, ax + pop ds +MEND + +ASM_END + +ASM_START +.text +.rom +.org 0 + +use16 386 + +vgabios_start: +.byte 0x55, 0xaa /* BIOS signature, required for BIOS extensions */ + +.byte 0x40 /* BIOS extension length in units of 512 bytes */ + + +vgabios_entry_point: + + jmp vgabios_init_func + +#ifdef PCIBIOS +.org 0x18 +.word vgabios_pci_data +#endif + +// Info from Bart Oldeman +.org 0x1e +.ascii "IBM" +.byte 0x00 + +vgabios_name: +.ascii "Plex86/Bochs VGABios" +#ifdef PCIBIOS +.ascii " (PCI)" +#endif +.ascii " " +.byte 0x00 + +vgabios_version: +#ifndef VGABIOS_VERS +.ascii "current-cvs" +#else +.ascii VGABIOS_VERS +#endif +.ascii " " + +vgabios_date: +.ascii VGABIOS_DATE +.byte 0x0a,0x0d +.byte 0x00 + +vgabios_copyright: +.ascii "(C) 2008 the LGPL VGABios developers Team" +.byte 0x0a,0x0d +.byte 0x00 + +vgabios_license: +.ascii "This VGA/VBE Bios is released under the GNU LGPL" +.byte 0x0a,0x0d +.byte 0x0a,0x0d +.byte 0x00 + +vgabios_website: +.ascii "Please visit :" +.byte 0x0a,0x0d +;;.ascii " . http://www.plex86.org" +;;.byte 0x0a,0x0d +.ascii " . http://bochs.sourceforge.net" +.byte 0x0a,0x0d +.ascii " . http://www.nongnu.org/vgabios" +.byte 0x0a,0x0d +.byte 0x0a,0x0d +.byte 0x00 + +#ifdef PCIBIOS +vgabios_pci_data: +.ascii "PCIR" +#ifdef CIRRUS +.word 0x1013 +.word 0x00b8 // CLGD5446 +#else +#ifdef PCI_VID +.word PCI_VID +.word PCI_DID +#else +#error "Unknown PCI vendor and device id" +#endif +#endif +.word 0 // reserved +.word 0x18 // dlen +.byte 0 // revision +.byte 0x0 // class,hi: vga display +.word 0x300 // class,lo: vga display +.word 0x40 // bios size +.word 1 // revision +.byte 0 // intel x86 data +.byte 0x80 // last image +.word 0 // reserved +#endif + + +;; ============================================================================================ +;; +;; Init Entry point +;; +;; ============================================================================================ +vgabios_init_func: + +;; init vga card + call init_vga_card + +;; init basic bios vars + call init_bios_area + +#ifdef VBE +;; init vbe functions + call vbe_init +#endif + +;; set int10 vect + SET_INT_VECTOR(0x10, #0xC000, #vgabios_int10_handler) + +#ifdef CIRRUS + call cirrus_init +#endif + +;; display splash screen + call _display_splash_screen + +;; init video mode and clear the screen + mov ax,#0x0003 + int #0x10 + +;; show info + call _display_info + +#ifdef VBE +;; show vbe info + call vbe_display_info +#endif + +#ifdef CIRRUS +;; show cirrus info + call cirrus_display_info +#endif + + retf +ASM_END + +/* + * int10 handled here + */ +ASM_START +vgabios_int10_handler: + pushf +#ifdef DEBUG + push es + push ds + pusha + mov bx, #0xc000 + mov ds, bx + call _int10_debugmsg + popa + pop ds + pop es +#endif + cmp ah, #0x0f + jne int10_test_1A + call biosfn_get_video_mode + jmp int10_end +int10_test_1A: + cmp ah, #0x1a + jne int10_test_0B + call biosfn_group_1A + jmp int10_end +int10_test_0B: + cmp ah, #0x0b + jne int10_test_1103 + call biosfn_group_0B + jmp int10_end +int10_test_1103: + cmp ax, #0x1103 + jne int10_test_12 + call biosfn_set_text_block_specifier + jmp int10_end +int10_test_12: + cmp ah, #0x12 + jne int10_test_101B + cmp bl, #0x10 + jne int10_test_BL30 + call biosfn_get_ega_info + jmp int10_end +int10_test_BL30: + cmp bl, #0x30 + jne int10_test_BL31 + call biosfn_select_vert_res + jmp int10_end +int10_test_BL31: + cmp bl, #0x31 + jne int10_test_BL32 + call biosfn_enable_default_palette_loading + jmp int10_end +int10_test_BL32: + cmp bl, #0x32 + jne int10_test_BL33 + call biosfn_enable_video_addressing + jmp int10_end +int10_test_BL33: + cmp bl, #0x33 + jne int10_test_BL34 + call biosfn_enable_grayscale_summing + jmp int10_end +int10_test_BL34: + cmp bl, #0x34 + jne int10_normal + call biosfn_enable_cursor_emulation + jmp int10_end +int10_test_101B: + cmp ax, #0x101b + je int10_normal + cmp ah, #0x10 +#ifndef VBE + jne int10_normal +#else + jne int10_test_4F +#endif + call biosfn_group_10 + jmp int10_end +#ifdef VBE +int10_test_4F: + cmp ah, #0x4f + jne int10_normal + cmp al, #0x03 + jne int10_test_vbe_05 + call vbe_biosfn_return_current_mode + jmp int10_end +int10_test_vbe_05: + cmp al, #0x05 + jne int10_test_vbe_06 + call vbe_biosfn_display_window_control + jmp int10_end +int10_test_vbe_06: + cmp al, #0x06 + jne int10_test_vbe_07 + call vbe_biosfn_set_get_logical_scan_line_length + jmp int10_end +int10_test_vbe_07: + cmp al, #0x07 + jne int10_test_vbe_08 + call vbe_biosfn_set_get_display_start + jmp int10_end +int10_test_vbe_08: + cmp al, #0x08 + jne int10_test_vbe_0A + call vbe_biosfn_set_get_dac_palette_format + jmp int10_end +int10_test_vbe_0A: + cmp al, #0x0A + jne int10_normal + call vbe_biosfn_return_protected_mode_interface + jmp int10_end +#endif + +int10_normal: + push es + push ds + pusha + +;; We have to set ds to access the right data segment + mov bx, #0xc000 + mov ds, bx + call _int10_func + + popa + pop ds + pop es +int10_end: + popf + iret +ASM_END + +#include "vgatables.h" +#include "vgafonts.h" + +/* + * Boot time harware inits + */ +ASM_START +init_vga_card: +;; switch to color mode and enable CPU access 480 lines + mov dx, #0x3C2 + mov al, #0xC3 + outb dx,al + +;; more than 64k 3C4/04 + mov dx, #0x3C4 + mov al, #0x04 + outb dx,al + mov dx, #0x3C5 + mov al, #0x02 + outb dx,al + +#if defined(USE_BX_INFO) || defined(DEBUG) + mov bx, #msg_vga_init + push bx + call _printf +#endif + inc sp + inc sp + ret + +#if defined(USE_BX_INFO) || defined(DEBUG) +msg_vga_init: +.ascii "VGABios $Id$" +.byte 0x0d,0x0a,0x00 +#endif +ASM_END + +// -------------------------------------------------------------------------------------------- +/* + * Boot time bios area inits + */ +ASM_START +init_bios_area: + push ds + mov ax, # BIOSMEM_SEG + mov ds, ax + +;; init detected hardware BIOS Area + mov bx, # BIOSMEM_INITIAL_MODE + mov ax, [bx] + and ax, #0xffcf +;; set 80x25 color (not clear from RBIL but usual) + or ax, #0x0020 + mov [bx], ax + +;; Just for the first int10 find its children + +;; the default char height + mov bx, # BIOSMEM_CHAR_HEIGHT + mov al, #0x10 + mov [bx], al + +;; Clear the screen + mov bx, # BIOSMEM_VIDEO_CTL + mov al, #0x60 + mov [bx], al + +;; Set the basic screen we have + mov bx, # BIOSMEM_SWITCHES + mov al, #0xf9 + mov [bx], al + +;; Set the basic modeset options + mov bx, # BIOSMEM_MODESET_CTL + mov al, #0x51 + mov [bx], al + +;; Set the default MSR + mov bx, # BIOSMEM_CURRENT_MSR + mov al, #0x09 + mov [bx], al + + pop ds + ret + +_video_save_pointer_table: + .word _video_param_table + .word 0xc000 + + .word 0 /* XXX: fill it */ + .word 0 + + .word 0 /* XXX: fill it */ + .word 0 + + .word 0 /* XXX: fill it */ + .word 0 + + .word 0 /* XXX: fill it */ + .word 0 + + .word 0 /* XXX: fill it */ + .word 0 + + .word 0 /* XXX: fill it */ + .word 0 + +ASM_END + +// -------------------------------------------------------------------------------------------- +/* + * Boot time Splash screen + */ +static void display_splash_screen() +{ +} + +// -------------------------------------------------------------------------------------------- +/* + * Tell who we are + */ + +static void display_info() +{ +ASM_START + mov ax,#0xc000 + mov ds,ax + mov si,#vgabios_name + call _display_string + mov si,#vgabios_version + call _display_string + + ;;mov si,#vgabios_copyright + ;;call _display_string + ;;mov si,#crlf + ;;call _display_string + + mov si,#vgabios_license + call _display_string + mov si,#vgabios_website + call _display_string +ASM_END +} + +static void display_string() +{ + // Get length of string +ASM_START + mov ax,ds + mov es,ax + mov di,si + xor cx,cx + not cx + xor al,al + cld + repne + scasb + not cx + dec cx + push cx + + mov ax,#0x0300 + mov bx,#0x0000 + int #0x10 + + pop cx + mov ax,#0x1301 + mov bx,#0x000b + mov bp,si + int #0x10 +ASM_END +} + +// -------------------------------------------------------------------------------------------- +#ifdef DEBUG +static void int10_debugmsg(DI, SI, BP, SP, BX, DX, CX, AX, DS, ES, FLAGS) + Bit16u DI, SI, BP, SP, BX, DX, CX, AX, ES, DS, FLAGS; +{ + // 0E is write char... + if(GET_AH()!=0x0E) + printf("vgabios call ah%02x al%02x bx%04x cx%04x dx%04x\n",GET_AH(),GET_AL(),BX,CX,DX); +} +#endif + +// -------------------------------------------------------------------------------------------- +/* + * int10 main dispatcher + */ +static void int10_func(DI, SI, BP, SP, BX, DX, CX, AX, DS, ES, FLAGS) + Bit16u DI, SI, BP, SP, BX, DX, CX, AX, ES, DS, FLAGS; +{ + + // BIOS functions + switch(GET_AH()) + { + case 0x00: + biosfn_set_video_mode(GET_AL()); + switch(GET_AL()&0x7F) + {case 6: + SET_AL(0x3F); + break; + case 0: + case 1: + case 2: + case 3: + case 4: + case 5: + case 7: + SET_AL(0x30); + break; + default: + SET_AL(0x20); + } + break; + case 0x01: + biosfn_set_cursor_shape(GET_CH(),GET_CL()); + break; + case 0x02: + biosfn_set_cursor_pos(GET_BH(),DX); + break; + case 0x03: + biosfn_get_cursor_pos(GET_BH(),&CX,&DX); + break; + case 0x04: + // Read light pen pos (unimplemented) +#ifdef DEBUG + unimplemented(); +#endif + AX=0x00; + BX=0x00; + CX=0x00; + DX=0x00; + break; + case 0x05: + biosfn_set_active_page(GET_AL()); + break; + case 0x06: + biosfn_scroll(GET_AL(),GET_BH(),GET_CH(),GET_CL(),GET_DH(),GET_DL(),0xFF,SCROLL_UP); + break; + case 0x07: + biosfn_scroll(GET_AL(),GET_BH(),GET_CH(),GET_CL(),GET_DH(),GET_DL(),0xFF,SCROLL_DOWN); + break; + case 0x08: + biosfn_read_char_attr(GET_BH(),&AX); + break; + case 0x09: + biosfn_write_char_attr(GET_AL(),GET_BH(),GET_BL(),CX); + break; + case 0x0A: + biosfn_write_char_only(GET_AL(),GET_BH(),GET_BL(),CX); + break; + case 0x0C: + biosfn_write_pixel(GET_BH(),GET_AL(),CX,DX); + break; + case 0x0D: + biosfn_read_pixel(GET_BH(),CX,DX,&AX); + break; + case 0x0E: + // Ralf Brown Interrupt list is WRONG on bh(page) + // We do output only on the current page ! + biosfn_write_teletype(GET_AL(),0xff,GET_BL(),NO_ATTR); + break; + case 0x10: + // All other functions of group AH=0x10 rewritten in assembler + biosfn_perform_gray_scale_summing(BX,CX); + break; + case 0x11: + switch(GET_AL()) + { + case 0x00: + case 0x10: + biosfn_load_text_user_pat(GET_AL(),ES,BP,CX,DX,GET_BL(),GET_BH()); + break; + case 0x01: + case 0x11: + biosfn_load_text_8_14_pat(GET_AL(),GET_BL()); + break; + case 0x02: + case 0x12: + biosfn_load_text_8_8_pat(GET_AL(),GET_BL()); + break; + case 0x04: + case 0x14: + biosfn_load_text_8_16_pat(GET_AL(),GET_BL()); + break; + case 0x20: + biosfn_load_gfx_8_8_chars(ES,BP); + break; + case 0x21: + biosfn_load_gfx_user_chars(ES,BP,CX,GET_BL(),GET_DL()); + break; + case 0x22: + biosfn_load_gfx_8_14_chars(GET_BL()); + break; + case 0x23: + biosfn_load_gfx_8_8_dd_chars(GET_BL()); + break; + case 0x24: + biosfn_load_gfx_8_16_chars(GET_BL()); + break; + case 0x30: + biosfn_get_font_info(GET_BH(),&ES,&BP,&CX,&DX); + break; +#ifdef DEBUG + default: + unknown(); +#endif + } + + break; + case 0x12: + switch(GET_BL()) + { + case 0x20: + biosfn_alternate_prtsc(); + break; + case 0x35: + biosfn_switch_video_interface(GET_AL(),ES,DX); + SET_AL(0x12); + break; + case 0x36: + biosfn_enable_video_refresh_control(GET_AL()); + SET_AL(0x12); + break; +#ifdef DEBUG + default: + unknown(); +#endif + } + break; + case 0x13: + biosfn_write_string(GET_AL(),GET_BH(),GET_BL(),CX,GET_DH(),GET_DL(),ES,BP); + break; + case 0x1B: + biosfn_read_state_info(BX,ES,DI); + SET_AL(0x1B); + break; + case 0x1C: + switch(GET_AL()) + { + case 0x00: + biosfn_read_video_state_size(CX,&BX); + break; + case 0x01: + biosfn_save_video_state(CX,ES,BX); + break; + case 0x02: + biosfn_restore_video_state(CX,ES,BX); + break; +#ifdef DEBUG + default: + unknown(); +#endif + } + SET_AL(0x1C); + break; + +#ifdef VBE + case 0x4f: + if (vbe_has_vbe_display()) { + switch(GET_AL()) + { + case 0x00: + vbe_biosfn_return_controller_information(&AX,ES,DI); + break; + case 0x01: + vbe_biosfn_return_mode_information(&AX,CX,ES,DI); + break; + case 0x02: + vbe_biosfn_set_mode(&AX,BX,ES,DI); + break; + case 0x04: + vbe_biosfn_save_restore_state(&AX, CX, DX, ES, &BX); + break; + case 0x09: + //FIXME +#ifdef DEBUG + unimplemented(); +#endif + // function failed + AX=0x100; + break; + case 0x0A: + //FIXME +#ifdef DEBUG + unimplemented(); +#endif + // function failed + AX=0x100; + break; + default: +#ifdef DEBUG + unknown(); +#endif + // function failed + AX=0x100; + } + } + else { + // No VBE display + AX=0x0100; + } + break; +#endif + +#ifdef DEBUG + default: + unknown(); +#endif + } +} + +// ============================================================================================ +// +// BIOS functions +// +// ============================================================================================ + +static void biosfn_set_video_mode(mode) Bit8u mode; +{// mode: Bit 7 is 1 if no clear screen + + // Should we clear the screen ? + Bit8u noclearmem=mode&0x80; + Bit8u line,mmask,*palette,vpti; + Bit16u i,twidth,theightm1,cheight; + Bit8u modeset_ctl,video_ctl,vga_switches; + Bit16u crtc_addr; + +#ifdef VBE + if (vbe_has_vbe_display()) { + dispi_set_enable(VBE_DISPI_DISABLED); + } +#endif // def VBE + + // The real mode + mode=mode&0x7f; + + // find the entry in the video modes + line=find_vga_entry(mode); + +#ifdef DEBUG + printf("mode search %02x found line %02x\n",mode,line); +#endif + + if(line==0xFF) + return; + + vpti=line_to_vpti[line]; + twidth=video_param_table[vpti].twidth; + theightm1=video_param_table[vpti].theightm1; + cheight=video_param_table[vpti].cheight; + + // Read the bios vga control + video_ctl=read_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL); + + // Read the bios vga switches + vga_switches=read_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES); + + // Read the bios mode set control + modeset_ctl=read_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL); + + // Then we know the number of lines +// FIXME + + // if palette loading (bit 3 of modeset ctl = 0) + if((modeset_ctl&0x08)==0) + {// Set the PEL mask + outb(VGAREG_PEL_MASK,vga_modes[line].pelmask); + + // Set the whole dac always, from 0 + outb(VGAREG_DAC_WRITE_ADDRESS,0x00); + + // From which palette + switch(vga_modes[line].dacmodel) + {case 0: + palette=&palette0; + break; + case 1: + palette=&palette1; + break; + case 2: + palette=&palette2; + break; + case 3: + palette=&palette3; + break; + } + // Always 256*3 values + for(i=0;i<0x0100;i++) + {if(i<=dac_regs[vga_modes[line].dacmodel]) + {outb(VGAREG_DAC_DATA,palette[(i*3)+0]); + outb(VGAREG_DAC_DATA,palette[(i*3)+1]); + outb(VGAREG_DAC_DATA,palette[(i*3)+2]); + } + else + {outb(VGAREG_DAC_DATA,0); + outb(VGAREG_DAC_DATA,0); + outb(VGAREG_DAC_DATA,0); + } + } + if((modeset_ctl&0x02)==0x02) + { + biosfn_perform_gray_scale_summing(0x00, 0x100); + } + } + + // Reset Attribute Ctl flip-flop + inb(VGAREG_ACTL_RESET); + + // Set Attribute Ctl + for(i=0;i<=0x13;i++) + {outb(VGAREG_ACTL_ADDRESS,i); + outb(VGAREG_ACTL_WRITE_DATA,video_param_table[vpti].actl_regs[i]); + } + outb(VGAREG_ACTL_ADDRESS,0x14); + outb(VGAREG_ACTL_WRITE_DATA,0x00); + + // Set Sequencer Ctl + outb(VGAREG_SEQU_ADDRESS,0); + outb(VGAREG_SEQU_DATA,0x03); + for(i=1;i<=4;i++) + {outb(VGAREG_SEQU_ADDRESS,i); + outb(VGAREG_SEQU_DATA,video_param_table[vpti].sequ_regs[i - 1]); + } + + // Set Grafx Ctl + for(i=0;i<=8;i++) + {outb(VGAREG_GRDC_ADDRESS,i); + outb(VGAREG_GRDC_DATA,video_param_table[vpti].grdc_regs[i]); + } + + // Set CRTC address VGA or MDA + crtc_addr=vga_modes[line].memmodel==MTEXT?VGAREG_MDA_CRTC_ADDRESS:VGAREG_VGA_CRTC_ADDRESS; + + // Disable CRTC write protection + outw(crtc_addr,0x0011); + // Set CRTC regs + for(i=0;i<=0x18;i++) + {outb(crtc_addr,i); + outb(crtc_addr+1,video_param_table[vpti].crtc_regs[i]); + } + + // Set the misc register + outb(VGAREG_WRITE_MISC_OUTPUT,video_param_table[vpti].miscreg); + + // Enable video + outb(VGAREG_ACTL_ADDRESS,0x20); + inb(VGAREG_ACTL_RESET); + + if(noclearmem==0x00) + { + if(vga_modes[line].class==TEXT) + { + memsetw(vga_modes[line].sstart,0,0x0720,0x4000); // 32k + } + else + { + if(mode<0x0d) + { + memsetw(vga_modes[line].sstart,0,0x0000,0x4000); // 32k + } + else + { + outb( VGAREG_SEQU_ADDRESS, 0x02 ); + mmask = inb( VGAREG_SEQU_DATA ); + outb( VGAREG_SEQU_DATA, 0x0f ); // all planes + memsetw(vga_modes[line].sstart,0,0x0000,0x8000); // 64k + outb( VGAREG_SEQU_DATA, mmask ); + } + } + } + + // Set the BIOS mem + write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE,mode); + write_word(BIOSMEM_SEG,BIOSMEM_NB_COLS,twidth); + write_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE,*(Bit16u *)&video_param_table[vpti].slength_l); + write_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS,crtc_addr); + write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS,theightm1); + write_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT,cheight); + write_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL,(0x60|noclearmem)); + write_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES,0xF9); + write_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL,read_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL)&0x7f); + + // FIXME We nearly have the good tables. to be reworked + write_byte(BIOSMEM_SEG,BIOSMEM_DCC_INDEX,0x08); // 8 is VGA should be ok for now + write_word(BIOSMEM_SEG,BIOSMEM_VS_POINTER, video_save_pointer_table); + write_word(BIOSMEM_SEG,BIOSMEM_VS_POINTER+2, 0xc000); + + // FIXME + write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MSR,0x00); // Unavailable on vanilla vga, but... + write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAL,0x00); // Unavailable on vanilla vga, but... + + // Set cursor shape + if(vga_modes[line].class==TEXT) + { + biosfn_set_cursor_shape(0x06,0x07); + } + + // Set cursor pos for page 0..7 + for(i=0;i<8;i++) + biosfn_set_cursor_pos(i,0x0000); + + // Set active page 0 + biosfn_set_active_page(0x00); + + // Write the fonts in memory + if(vga_modes[line].class==TEXT) + { +ASM_START + ;; copy and activate 8x16 font + mov ax, #0x1104 + mov bl, #0x00 + int #0x10 + mov ax, #0x1103 + mov bl, #0x00 + int #0x10 +ASM_END + } + + // Set the ints 0x1F and 0x43 +ASM_START + SET_INT_VECTOR(0x1f, #0xC000, #_vgafont8+128*8) +ASM_END + + switch(cheight) + {case 8: +ASM_START + SET_INT_VECTOR(0x43, #0xC000, #_vgafont8) +ASM_END + break; + case 14: +ASM_START + SET_INT_VECTOR(0x43, #0xC000, #_vgafont14) +ASM_END + break; + case 16: +ASM_START + SET_INT_VECTOR(0x43, #0xC000, #_vgafont16) +ASM_END + break; + } +} + +// -------------------------------------------------------------------------------------------- +static void biosfn_set_cursor_shape (CH,CL) +Bit8u CH;Bit8u CL; +{Bit16u cheight,curs,crtc_addr; + Bit8u modeset_ctl; + + CH&=0x3f; + CL&=0x1f; + + curs=(CH<<8)+CL; + write_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE,curs); + + modeset_ctl=read_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL); + cheight = read_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT); + if((modeset_ctl&0x01) && (cheight>8) && (CL<8) && (CH<0x20)) + { + if(CL!=(CH+1)) + { + CH = ((CH+1) * cheight / 8) -1; + } + else + { + CH = ((CL+1) * cheight / 8) - 2; + } + CL = ((CL+1) * cheight / 8) - 1; + } + + // CTRC regs 0x0a and 0x0b + crtc_addr=read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS); + outb(crtc_addr,0x0a); + outb(crtc_addr+1,CH); + outb(crtc_addr,0x0b); + outb(crtc_addr+1,CL); +} + +// -------------------------------------------------------------------------------------------- +static void biosfn_set_cursor_pos (page, cursor) +Bit8u page;Bit16u cursor; +{ + Bit8u xcurs,ycurs,current; + Bit16u nbcols,nbrows,address,crtc_addr; + + // Should not happen... + if(page>7)return; + + // Bios cursor pos + write_word(BIOSMEM_SEG, BIOSMEM_CURSOR_POS+2*page, cursor); + + // Set the hardware cursor + current=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE); + if(page==current) + { + // Get the dimensions + nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS); + nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1; + + xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8; + + // Calculate the address knowing nbcols nbrows and page num + address=SCREEN_IO_START(nbcols,nbrows,page)+xcurs+ycurs*nbcols; + + // CRTC regs 0x0e and 0x0f + crtc_addr=read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS); + outb(crtc_addr,0x0e); + outb(crtc_addr+1,(address&0xff00)>>8); + outb(crtc_addr,0x0f); + outb(crtc_addr+1,address&0x00ff); + } +} + +// -------------------------------------------------------------------------------------------- +static void biosfn_get_cursor_pos (page,shape, pos) +Bit8u page;Bit16u *shape;Bit16u *pos; +{ + Bit16u ss=get_SS(); + + // Default + write_word(ss, shape, 0); + write_word(ss, pos, 0); + + if(page>7)return; + // FIXME should handle VGA 14/16 lines + write_word(ss,shape,read_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE)); + write_word(ss,pos,read_word(BIOSMEM_SEG,BIOSMEM_CURSOR_POS+page*2)); +} + +// -------------------------------------------------------------------------------------------- +static void biosfn_set_active_page (page) +Bit8u page; +{ + Bit16u cursor,dummy,crtc_addr; + Bit16u nbcols,nbrows,address; + Bit8u mode,line; + + if(page>7)return; + + // Get the mode + mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE); + line=find_vga_entry(mode); + if(line==0xFF)return; + + // Get pos curs pos for the right page + biosfn_get_cursor_pos(page,&dummy,&cursor); + + if(vga_modes[line].class==TEXT) + { + // Get the dimensions + nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS); + nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1; + + // Calculate the address knowing nbcols nbrows and page num + address=SCREEN_MEM_START(nbcols,nbrows,page); + write_word(BIOSMEM_SEG,BIOSMEM_CURRENT_START,address); + + // Start address + address=SCREEN_IO_START(nbcols,nbrows,page); + } + else + { + address = page * (*(Bit16u *)&video_param_table[line_to_vpti[line]].slength_l); + } + + // CRTC regs 0x0c and 0x0d + crtc_addr=read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS); + outb(crtc_addr,0x0c); + outb(crtc_addr+1,(address&0xff00)>>8); + outb(crtc_addr,0x0d); + outb(crtc_addr+1,address&0x00ff); + + // And change the BIOS page + write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE,page); + +#ifdef DEBUG + printf("Set active page %02x address %04x\n",page,address); +#endif + + // Display the cursor, now the page is active + biosfn_set_cursor_pos(page,cursor); +} + +// -------------------------------------------------------------------------------------------- +static void vgamem_copy_pl4(xstart,ysrc,ydest,cols,nbcols,cheight) +Bit8u xstart;Bit8u ysrc;Bit8u ydest;Bit8u cols;Bit8u nbcols;Bit8u cheight; +{ + Bit16u src,dest; + Bit8u i; + + src=ysrc*cheight*nbcols+xstart; + dest=ydest*cheight*nbcols+xstart; + outw(VGAREG_GRDC_ADDRESS, 0x0105); + for(i=0;i<cheight;i++) + { + memcpyb(0xa000,dest+i*nbcols,0xa000,src+i*nbcols,cols); + } + outw(VGAREG_GRDC_ADDRESS, 0x0005); +} + +// -------------------------------------------------------------------------------------------- +static void vgamem_fill_pl4(xstart,ystart,cols,nbcols,cheight,attr) +Bit8u xstart;Bit8u ystart;Bit8u cols;Bit8u nbcols;Bit8u cheight;Bit8u attr; +{ + Bit16u dest; + Bit8u i; + + dest=ystart*cheight*nbcols+xstart; + outw(VGAREG_GRDC_ADDRESS, 0x0205); + for(i=0;i<cheight;i++) + { + memsetb(0xa000,dest+i*nbcols,attr,cols); + } + outw(VGAREG_GRDC_ADDRESS, 0x0005); +} + +// -------------------------------------------------------------------------------------------- +static void vgamem_copy_cga(xstart,ysrc,ydest,cols,nbcols,cheight) +Bit8u xstart;Bit8u ysrc;Bit8u ydest;Bit8u cols;Bit8u nbcols;Bit8u cheight; +{ + Bit16u src,dest; + Bit8u i; + + src=((ysrc*cheight*nbcols)>>1)+xstart; + dest=((ydest*cheight*nbcols)>>1)+xstart; + for(i=0;i<cheight;i++) + { + if (i & 1) + memcpyb(0xb800,0x2000+dest+(i>>1)*nbcols,0xb800,0x2000+src+(i>>1)*nbcols,cols); + else + memcpyb(0xb800,dest+(i>>1)*nbcols,0xb800,src+(i>>1)*nbcols,cols); + } +} + +// -------------------------------------------------------------------------------------------- +static void vgamem_fill_cga(xstart,ystart,cols,nbcols,cheight,attr) +Bit8u xstart;Bit8u ystart;Bit8u cols;Bit8u nbcols;Bit8u cheight;Bit8u attr; +{ + Bit16u dest; + Bit8u i; + + dest=((ystart*cheight*nbcols)>>1)+xstart; + for(i=0;i<cheight;i++) + { + if (i & 1) + memsetb(0xb800,0x2000+dest+(i>>1)*nbcols,attr,cols); + else + memsetb(0xb800,dest+(i>>1)*nbcols,attr,cols); + } +} + +// -------------------------------------------------------------------------------------------- +static void biosfn_scroll (nblines,attr,rul,cul,rlr,clr,page,dir) +Bit8u nblines;Bit8u attr;Bit8u rul;Bit8u cul;Bit8u rlr;Bit8u clr;Bit8u page;Bit8u dir; +{ + // page == 0xFF if current + + Bit8u mode,line,cheight,bpp,cols; + Bit16u nbcols,nbrows,i; + Bit16u address; + + if(rul>rlr)return; + if(cul>clr)return; + + // Get the mode + mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE); + line=find_vga_entry(mode); + if(line==0xFF)return; + + // Get the dimensions + nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1; + nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS); + + // Get the current page + if(page==0xFF) + page=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE); + + if(rlr>=nbrows)rlr=nbrows-1; + if(clr>=nbcols)clr=nbcols-1; + if(nblines>nbrows)nblines=0; + cols=clr-cul+1; + + if(vga_modes[line].class==TEXT) + { + // Compute the address + address=SCREEN_MEM_START(nbcols,nbrows,page); +#ifdef DEBUG + printf("Scroll, address %04x (%04x %04x %02x)\n",address,nbrows,nbcols,page); +#endif + + if(nblines==0&&rul==0&&cul==0&&rlr==nbrows-1&&clr==nbcols-1) + { + memsetw(vga_modes[line].sstart,address,(Bit16u)attr*0x100+' ',nbrows*nbcols); + } + else + {// if Scroll up + if(dir==SCROLL_UP) + {for(i=rul;i<=rlr;i++) + { + if((i+nblines>rlr)||(nblines==0)) + memsetw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,(Bit16u)attr*0x100+' ',cols); + else + memcpyw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,vga_modes[line].sstart,((i+nblines)*nbcols+cul)*2,cols); + } + } + else + {for(i=rlr;i>=rul;i--) + { + if((i<rul+nblines)||(nblines==0)) + memsetw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,(Bit16u)attr*0x100+' ',cols); + else + memcpyw(vga_modes[line].sstart,address+(i*nbcols+cul)*2,vga_modes[line].sstart,((i-nblines)*nbcols+cul)*2,cols); + if (i>rlr) break; + } + } + } + } + else + { + // FIXME gfx mode not complete + cheight=video_param_table[line_to_vpti[line]].cheight; + switch(vga_modes[line].memmodel) + { + case PLANAR4: + case PLANAR1: + if(nblines==0&&rul==0&&cul==0&&rlr==nbrows-1&&clr==nbcols-1) + { + outw(VGAREG_GRDC_ADDRESS, 0x0205); + memsetb(vga_modes[line].sstart,0,attr,nbrows*nbcols*cheight); + outw(VGAREG_GRDC_ADDRESS, 0x0005); + } + else + {// if Scroll up + if(dir==SCROLL_UP) + {for(i=rul;i<=rlr;i++) + { + if((i+nblines>rlr)||(nblines==0)) + vgamem_fill_pl4(cul,i,cols,nbcols,cheight,attr); + else + vgamem_copy_pl4(cul,i+nblines,i,cols,nbcols,cheight); + } + } + else + {for(i=rlr;i>=rul;i--) + { + if((i<rul+nblines)||(nblines==0)) + vgamem_fill_pl4(cul,i,cols,nbcols,cheight,attr); + else + vgamem_copy_pl4(cul,i,i-nblines,cols,nbcols,cheight); + if (i>rlr) break; + } + } + } + break; + case CGA: + bpp=vga_modes[line].pixbits; + if(nblines==0&&rul==0&&cul==0&&rlr==nbrows-1&&clr==nbcols-1) + { + memsetb(vga_modes[line].sstart,0,attr,nbrows*nbcols*cheight*bpp); + } + else + { + if(bpp==2) + { + cul<<=1; + cols<<=1; + nbcols<<=1; + } + // if Scroll up + if(dir==SCROLL_UP) + {for(i=rul;i<=rlr;i++) + { + if((i+nblines>rlr)||(nblines==0)) + vgamem_fill_cga(cul,i,cols,nbcols,cheight,attr); + else + vgamem_copy_cga(cul,i+nblines,i,cols,nbcols,cheight); + } + } + else + {for(i=rlr;i>=rul;i--) + { + if((i<rul+nblines)||(nblines==0)) + vgamem_fill_cga(cul,i,cols,nbcols,cheight,attr); + else + vgamem_copy_cga(cul,i,i-nblines,cols,nbcols,cheight); + if (i>rlr) break; + } + } + } + break; +#ifdef DEBUG + default: + printf("Scroll in graphics mode "); + unimplemented(); +#endif + } + } +} + +// -------------------------------------------------------------------------------------------- +static void biosfn_read_char_attr (page,car) +Bit8u page;Bit16u *car; +{Bit16u ss=get_SS(); + Bit8u xcurs,ycurs,mode,line; + Bit16u nbcols,nbrows,address; + Bit16u cursor,dummy; + + // Get the mode + mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE); + line=find_vga_entry(mode); + if(line==0xFF)return; + + // Get the cursor pos for the page + biosfn_get_cursor_pos(page,&dummy,&cursor); + xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8; + + // Get the dimensions + nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1; + nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS); + + if(vga_modes[line].class==TEXT) + { + // Compute the address + address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+ycurs*nbcols)*2; + + write_word(ss,car,read_word(vga_modes[line].sstart,address)); + } + else + { + // FIXME gfx mode +#ifdef DEBUG + unimplemented(); +#endif + } +} + +// -------------------------------------------------------------------------------------------- +static void write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight) +Bit8u car;Bit8u attr;Bit8u xcurs;Bit8u ycurs;Bit8u nbcols;Bit8u cheight; +{ + Bit8u i,j,mask; + Bit8u *fdata; + Bit16u addr,dest,src; + + switch(cheight) + {case 14: + fdata = &vgafont14; + break; + case 16: + fdata = &vgafont16; + break; + default: + fdata = &vgafont8; + } + addr=xcurs+ycurs*cheight*nbcols; + src = car * cheight; + outw(VGAREG_SEQU_ADDRESS, 0x0f02); + outw(VGAREG_GRDC_ADDRESS, 0x0205); + if(attr&0x80) + { + outw(VGAREG_GRDC_ADDRESS, 0x1803); + } + else + { + outw(VGAREG_GRDC_ADDRESS, 0x0003); + } + for(i=0;i<cheight;i++) + { + dest=addr+i*nbcols; + for(j=0;j<8;j++) + { + mask=0x80>>j; + outw(VGAREG_GRDC_ADDRESS, (mask << 8) | 0x08); + read_byte(0xa000,dest); + if(fdata[src+i]&mask) + { + write_byte(0xa000,dest,attr&0x0f); + } + else + { + write_byte(0xa000,dest,0x00); + } + } + } +ASM_START + mov dx, # VGAREG_GRDC_ADDRESS + mov ax, #0xff08 + out dx, ax + mov ax, #0x0005 + out dx, ax + mov ax, #0x0003 + out dx, ax +ASM_END +} + +// -------------------------------------------------------------------------------------------- +static void write_gfx_char_cga(car,attr,xcurs,ycurs,nbcols,bpp) +Bit8u car;Bit8u attr;Bit8u xcurs;Bit8u ycurs;Bit8u nbcols;Bit8u bpp; +{ + Bit8u i,j,mask,data; + Bit8u *fdata; + Bit16u addr,dest,src; + + fdata = &vgafont8; + addr=(xcurs*bpp)+ycurs*320; + src = car * 8; + for(i=0;i<8;i++) + { + dest=addr+(i>>1)*80; + if (i & 1) dest += 0x2000; + mask = 0x80; + if (bpp == 1) + { + if (attr & 0x80) + { + data = read_byte(0xb800,dest); + } + else + { + data = 0x00; + } + for(j=0;j<8;j++) + { + if (fdata[src+i] & mask) + { + if (attr & 0x80) + { + data ^= (attr & 0x01) << (7-j); + } + else + { + data |= (attr & 0x01) << (7-j); + } + } + mask >>= 1; + } + write_byte(0xb800,dest,data); + } + else + { + while (mask > 0) + { + if (attr & 0x80) + { + data = read_byte(0xb800,dest); + } + else + { + data = 0x00; + } + for(j=0;j<4;j++) + { + if (fdata[src+i] & mask) + { + if (attr & 0x80) + { + data ^= (attr & 0x03) << ((3-j)*2); + } + else + { + data |= (attr & 0x03) << ((3-j)*2); + } + } + mask >>= 1; + } + write_byte(0xb800,dest,data); + dest += 1; + } + } + } +} + +// -------------------------------------------------------------------------------------------- +static void write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols) +Bit8u car;Bit8u attr;Bit8u xcurs;Bit8u ycurs;Bit8u nbcols; +{ + Bit8u i,j,mask,data; + Bit8u *fdata; + Bit16u addr,dest,src; + + fdata = &vgafont8; + addr=xcurs*8+ycurs*nbcols*64; + src = car * 8; + for(i=0;i<8;i++) + { + dest=addr+i*nbcols*8; + mask = 0x80; + for(j=0;j<8;j++) + { + data = 0x00; + if (fdata[src+i] & mask) + { + data = attr; + } + write_byte(0xa000,dest+j,data); + mask >>= 1; + } + } +} + +// -------------------------------------------------------------------------------------------- +static void biosfn_write_char_attr (car,page,attr,count) +Bit8u car;Bit8u page;Bit8u attr;Bit16u count; +{ + Bit8u cheight,xcurs,ycurs,mode,line,bpp; + Bit16u nbcols,nbrows,address; + Bit16u cursor,dummy; + + // Get the mode + mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE); + line=find_vga_entry(mode); + if(line==0xFF)return; + + // Get the cursor pos for the page + biosfn_get_cursor_pos(page,&dummy,&cursor); + xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8; + + // Get the dimensions + nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1; + nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS); + + if(vga_modes[line].class==TEXT) + { + // Compute the address + address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+ycurs*nbcols)*2; + + dummy=((Bit16u)attr<<8)+car; + memsetw(vga_modes[line].sstart,address,dummy,count); + } + else + { + // FIXME gfx mode not complete + cheight=video_param_table[line_to_vpti[line]].cheight; + bpp=vga_modes[line].pixbits; + while((count-->0) && (xcurs<nbcols)) + { + switch(vga_modes[line].memmodel) + { + case PLANAR4: + case PLANAR1: + write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight); + break; + case CGA: + write_gfx_char_cga(car,attr,xcurs,ycurs,nbcols,bpp); + break; + case LINEAR8: + write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols); + break; +#ifdef DEBUG + default: + unimplemented(); +#endif + } + xcurs++; + } + } +} + +// -------------------------------------------------------------------------------------------- +static void biosfn_write_char_only (car,page,attr,count) +Bit8u car;Bit8u page;Bit8u attr;Bit16u count; +{ + Bit8u cheight,xcurs,ycurs,mode,line,bpp; + Bit16u nbcols,nbrows,address; + Bit16u cursor,dummy; + + // Get the mode + mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE); + line=find_vga_entry(mode); + if(line==0xFF)return; + + // Get the cursor pos for the page + biosfn_get_cursor_pos(page,&dummy,&cursor); + xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8; + + // Get the dimensions + nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1; + nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS); + + if(vga_modes[line].class==TEXT) + { + // Compute the address + address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+ycurs*nbcols)*2; + + while(count-->0) + {write_byte(vga_modes[line].sstart,address,car); + address+=2; + } + } + else + { + // FIXME gfx mode not complete + cheight=video_param_table[line_to_vpti[line]].cheight; + bpp=vga_modes[line].pixbits; + while((count-->0) && (xcurs<nbcols)) + { + switch(vga_modes[line].memmodel) + { + case PLANAR4: + case PLANAR1: + write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight); + break; + case CGA: + write_gfx_char_cga(car,attr,xcurs,ycurs,nbcols,bpp); + break; + case LINEAR8: + write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols); + break; +#ifdef DEBUG + default: + unimplemented(); +#endif + } + xcurs++; + } + } +} + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_group_0B: + cmp bh, #0x00 + je biosfn_set_border_color + cmp bh, #0x01 + je biosfn_set_palette +#ifdef DEBUG + call _unknown +#endif + ret +biosfn_set_border_color: + push ax + push bx + push cx + push dx + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, #0x00 + out dx, al + mov al, bl + and al, #0x0f + test al, #0x08 + jz set_low_border + add al, #0x08 +set_low_border: + out dx, al + mov cl, #0x01 + and bl, #0x10 +set_intensity_loop: + mov dx, # VGAREG_ACTL_ADDRESS + mov al, cl + out dx, al + mov dx, # VGAREG_ACTL_READ_DATA + in al, dx + and al, #0xef + or al, bl + mov dx, # VGAREG_ACTL_ADDRESS + out dx, al + inc cl + cmp cl, #0x04 + jne set_intensity_loop + mov al, #0x20 + out dx, al + pop dx + pop cx + pop bx + pop ax + ret +biosfn_set_palette: + push ax + push bx + push cx + push dx + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov cl, #0x01 + and bl, #0x01 +set_cga_palette_loop: + mov dx, # VGAREG_ACTL_ADDRESS + mov al, cl + out dx, al + mov dx, # VGAREG_ACTL_READ_DATA + in al, dx + and al, #0xfe + or al, bl + mov dx, # VGAREG_ACTL_ADDRESS + out dx, al + inc cl + cmp cl, #0x04 + jne set_cga_palette_loop + mov al, #0x20 + out dx, al + pop dx + pop cx + pop bx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +static void biosfn_write_pixel (BH,AL,CX,DX) Bit8u BH;Bit8u AL;Bit16u CX;Bit16u DX; +{ + Bit8u mode,line,mask,attr,data; + Bit16u addr; + + // Get the mode + mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE); + line=find_vga_entry(mode); + if(line==0xFF)return; + if(vga_modes[line].class==TEXT)return; + + switch(vga_modes[line].memmodel) + { + case PLANAR4: + case PLANAR1: + addr = CX/8+DX*read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS); + mask = 0x80 >> (CX & 0x07); + outw(VGAREG_GRDC_ADDRESS, (mask << 8) | 0x08); + outw(VGAREG_GRDC_ADDRESS, 0x0205); + data = read_byte(0xa000,addr); + if (AL & 0x80) + { + outw(VGAREG_GRDC_ADDRESS, 0x1803); + } + write_byte(0xa000,addr,AL); +ASM_START + mov dx, # VGAREG_GRDC_ADDRESS + mov ax, #0xff08 + out dx, ax + mov ax, #0x0005 + out dx, ax + mov ax, #0x0003 + out dx, ax +ASM_END + break; + case CGA: + if(vga_modes[line].pixbits==2) + { + addr=(CX>>2)+(DX>>1)*80; + } + else + { + addr=(CX>>3)+(DX>>1)*80; + } + if (DX & 1) addr += 0x2000; + data = read_byte(0xb800,addr); + if(vga_modes[line].pixbits==2) + { + attr = (AL & 0x03) << ((3 - (CX & 0x03)) * 2); + mask = 0x03 << ((3 - (CX & 0x03)) * 2); + } + else + { + attr = (AL & 0x01) << (7 - (CX & 0x07)); + mask = 0x01 << (7 - (CX & 0x07)); + } + if (AL & 0x80) + { + data ^= attr; + } + else + { + data &= ~mask; + data |= attr; + } + write_byte(0xb800,addr,data); + break; + case LINEAR8: + addr=CX+DX*(read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS)*8); + write_byte(0xa000,addr,AL); + break; +#ifdef DEBUG + default: + unimplemented(); +#endif + } +} + +// -------------------------------------------------------------------------------------------- +static void biosfn_read_pixel (BH,CX,DX,AX) Bit8u BH;Bit16u CX;Bit16u DX;Bit16u *AX; +{ + Bit8u mode,line,mask,attr,data,i; + Bit16u addr; + Bit16u ss=get_SS(); + + // Get the mode + mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE); + line=find_vga_entry(mode); + if(line==0xFF)return; + if(vga_modes[line].class==TEXT)return; + + switch(vga_modes[line].memmodel) + { + case PLANAR4: + case PLANAR1: + addr = CX/8+DX*read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS); + mask = 0x80 >> (CX & 0x07); + attr = 0x00; + for(i=0;i<4;i++) + { + outw(VGAREG_GRDC_ADDRESS, (i << 8) | 0x04); + data = read_byte(0xa000,addr) & mask; + if (data > 0) attr |= (0x01 << i); + } + break; + case CGA: + addr=(CX>>2)+(DX>>1)*80; + if (DX & 1) addr += 0x2000; + data = read_byte(0xb800,addr); + if(vga_modes[line].pixbits==2) + { + attr = (data >> ((3 - (CX & 0x03)) * 2)) & 0x03; + } + else + { + attr = (data >> (7 - (CX & 0x07))) & 0x01; + } + break; + case LINEAR8: + addr=CX+DX*(read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS)*8); + attr=read_byte(0xa000,addr); + break; + default: +#ifdef DEBUG + unimplemented(); +#endif + attr = 0; + } + write_word(ss,AX,(read_word(ss,AX) & 0xff00) | attr); +} + +// -------------------------------------------------------------------------------------------- +static void biosfn_write_teletype (car, page, attr, flag) +Bit8u car;Bit8u page;Bit8u attr;Bit8u flag; +{// flag = WITH_ATTR / NO_ATTR + + Bit8u cheight,xcurs,ycurs,mode,line,bpp; + Bit16u nbcols,nbrows,address; + Bit16u cursor,dummy; + + // special case if page is 0xff, use current page + if(page==0xff) + page=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE); + + // Get the mode + mode=read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE); + line=find_vga_entry(mode); + if(line==0xFF)return; + + // Get the cursor pos for the page + biosfn_get_cursor_pos(page,&dummy,&cursor); + xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8; + + // Get the dimensions + nbrows=read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)+1; + nbcols=read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS); + + switch(car) + { + case 7: + //FIXME should beep + break; + + case 8: + if(xcurs>0)xcurs--; + break; + + case '\r': + xcurs=0; + break; + + case '\n': + ycurs++; + break; + + case '\t': + do + { + biosfn_write_teletype(' ',page,attr,flag); + biosfn_get_cursor_pos(page,&dummy,&cursor); + xcurs=cursor&0x00ff;ycurs=(cursor&0xff00)>>8; + }while(xcurs%8==0); + break; + + default: + + if(vga_modes[line].class==TEXT) + { + // Compute the address + address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+ycurs*nbcols)*2; + + // Write the char + write_byte(vga_modes[line].sstart,address,car); + + if(flag==WITH_ATTR) + write_byte(vga_modes[line].sstart,address+1,attr); + } + else + { + // FIXME gfx mode not complete + cheight=video_param_table[line_to_vpti[line]].cheight; + bpp=vga_modes[line].pixbits; + switch(vga_modes[line].memmodel) + { + case PLANAR4: + case PLANAR1: + write_gfx_char_pl4(car,attr,xcurs,ycurs,nbcols,cheight); + break; + case CGA: + write_gfx_char_cga(car,attr,xcurs,ycurs,nbcols,bpp); + break; + case LINEAR8: + write_gfx_char_lin(car,attr,xcurs,ycurs,nbcols); + break; +#ifdef DEBUG + default: + unimplemented(); +#endif + } + } + xcurs++; + } + + // Do we need to wrap ? + if(xcurs==nbcols) + {xcurs=0; + ycurs++; + } + + // Do we need to scroll ? + if(ycurs==nbrows) + { + if(vga_modes[line].class==TEXT) + { + address=SCREEN_MEM_START(nbcols,nbrows,page)+(xcurs+(ycurs-1)*nbcols)*2; + attr=read_byte(vga_modes[line].sstart,address+1); + biosfn_scroll(0x01,attr,0,0,nbrows-1,nbcols-1,page,SCROLL_UP); + } + else + { + biosfn_scroll(0x01,0x00,0,0,nbrows-1,nbcols-1,page,SCROLL_UP); + } + ycurs-=1; + } + + // Set the cursor for the page + cursor=ycurs; cursor<<=8; cursor+=xcurs; + biosfn_set_cursor_pos(page,cursor); +} + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_get_video_mode: + push ds + mov ax, # BIOSMEM_SEG + mov ds, ax + push bx + mov bx, # BIOSMEM_CURRENT_PAGE + mov al, [bx] + pop bx + mov bh, al + push bx + mov bx, # BIOSMEM_VIDEO_CTL + mov ah, [bx] + and ah, #0x80 + mov bx, # BIOSMEM_CURRENT_MODE + mov al, [bx] + or al, ah + mov bx, # BIOSMEM_NB_COLS + mov ah, [bx] + pop bx + pop ds + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_group_10: + cmp al, #0x00 + jne int10_test_1001 + jmp biosfn_set_single_palette_reg +int10_test_1001: + cmp al, #0x01 + jne int10_test_1002 + jmp biosfn_set_overscan_border_color +int10_test_1002: + cmp al, #0x02 + jne int10_test_1003 + jmp biosfn_set_all_palette_reg +int10_test_1003: + cmp al, #0x03 + jne int10_test_1007 + jmp biosfn_toggle_intensity +int10_test_1007: + cmp al, #0x07 + jne int10_test_1008 + jmp biosfn_get_single_palette_reg +int10_test_1008: + cmp al, #0x08 + jne int10_test_1009 + jmp biosfn_read_overscan_border_color +int10_test_1009: + cmp al, #0x09 + jne int10_test_1010 + jmp biosfn_get_all_palette_reg +int10_test_1010: + cmp al, #0x10 + jne int10_test_1012 + jmp biosfn_set_single_dac_reg +int10_test_1012: + cmp al, #0x12 + jne int10_test_1013 + jmp biosfn_set_all_dac_reg +int10_test_1013: + cmp al, #0x13 + jne int10_test_1015 + jmp biosfn_select_video_dac_color_page +int10_test_1015: + cmp al, #0x15 + jne int10_test_1017 + jmp biosfn_read_single_dac_reg +int10_test_1017: + cmp al, #0x17 + jne int10_test_1018 + jmp biosfn_read_all_dac_reg +int10_test_1018: + cmp al, #0x18 + jne int10_test_1019 + jmp biosfn_set_pel_mask +int10_test_1019: + cmp al, #0x19 + jne int10_test_101A + jmp biosfn_read_pel_mask +int10_test_101A: + cmp al, #0x1a + jne int10_group_10_unknown + jmp biosfn_read_video_dac_state +int10_group_10_unknown: +#ifdef DEBUG + call _unknown +#endif + ret + +biosfn_set_single_palette_reg: + cmp bl, #0x14 + ja no_actl_reg1 + push ax + push dx + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, bl + out dx, al + mov al, bh + out dx, al + mov al, #0x20 + out dx, al + pop dx + pop ax +no_actl_reg1: + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_set_overscan_border_color: + push bx + mov bl, #0x11 + call biosfn_set_single_palette_reg + pop bx + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_set_all_palette_reg: + push ax + push bx + push cx + push dx + mov bx, dx + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov cl, #0x00 + mov dx, # VGAREG_ACTL_ADDRESS +set_palette_loop: + mov al, cl + out dx, al + seg es + mov al, [bx] + out dx, al + inc bx + inc cl + cmp cl, #0x10 + jne set_palette_loop + mov al, #0x11 + out dx, al + seg es + mov al, [bx] + out dx, al + mov al, #0x20 + out dx, al + pop dx + pop cx + pop bx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_toggle_intensity: + push ax + push bx + push dx + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, #0x10 + out dx, al + mov dx, # VGAREG_ACTL_READ_DATA + in al, dx + and al, #0xf7 + and bl, #0x01 + shl bl, 3 + or al, bl + mov dx, # VGAREG_ACTL_ADDRESS + out dx, al + mov al, #0x20 + out dx, al + pop dx + pop bx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_get_single_palette_reg: + cmp bl, #0x14 + ja no_actl_reg2 + push ax + push dx + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, bl + out dx, al + mov dx, # VGAREG_ACTL_READ_DATA + in al, dx + mov bh, al + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, #0x20 + out dx, al + pop dx + pop ax +no_actl_reg2: + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_read_overscan_border_color: + push ax + push bx + mov bl, #0x11 + call biosfn_get_single_palette_reg + mov al, bh + pop bx + mov bh, al + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_get_all_palette_reg: + push ax + push bx + push cx + push dx + mov bx, dx + mov cl, #0x00 +get_palette_loop: + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, cl + out dx, al + mov dx, # VGAREG_ACTL_READ_DATA + in al, dx + seg es + mov [bx], al + inc bx + inc cl + cmp cl, #0x10 + jne get_palette_loop + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, #0x11 + out dx, al + mov dx, # VGAREG_ACTL_READ_DATA + in al, dx + seg es + mov [bx], al + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, #0x20 + out dx, al + pop dx + pop cx + pop bx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_set_single_dac_reg: + push ax + push dx + mov dx, # VGAREG_DAC_WRITE_ADDRESS + mov al, bl + out dx, al + mov dx, # VGAREG_DAC_DATA + pop ax + push ax + mov al, ah + out dx, al + mov al, ch + out dx, al + mov al, cl + out dx, al + pop dx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_set_all_dac_reg: + push ax + push bx + push cx + push dx + mov dx, # VGAREG_DAC_WRITE_ADDRESS + mov al, bl + out dx, al + pop dx + push dx + mov bx, dx + mov dx, # VGAREG_DAC_DATA +set_dac_loop: + seg es + mov al, [bx] + out dx, al + inc bx + seg es + mov al, [bx] + out dx, al + inc bx + seg es + mov al, [bx] + out dx, al + inc bx + dec cx + jnz set_dac_loop + pop dx + pop cx + pop bx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_select_video_dac_color_page: + push ax + push bx + push dx + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, #0x10 + out dx, al + mov dx, # VGAREG_ACTL_READ_DATA + in al, dx + and bl, #0x01 + jnz set_dac_page + and al, #0x7f + shl bh, 7 + or al, bh + mov dx, # VGAREG_ACTL_ADDRESS + out dx, al + jmp set_actl_normal +set_dac_page: + push ax + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, #0x14 + out dx, al + pop ax + and al, #0x80 + jnz set_dac_16_page + shl bh, 2 +set_dac_16_page: + and bh, #0x0f + mov al, bh + out dx, al +set_actl_normal: + mov al, #0x20 + out dx, al + pop dx + pop bx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_read_single_dac_reg: + push ax + push dx + mov dx, # VGAREG_DAC_READ_ADDRESS + mov al, bl + out dx, al + pop ax + mov ah, al + mov dx, # VGAREG_DAC_DATA + in al, dx + xchg al, ah + push ax + in al, dx + mov ch, al + in al, dx + mov cl, al + pop dx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_read_all_dac_reg: + push ax + push bx + push cx + push dx + mov dx, # VGAREG_DAC_READ_ADDRESS + mov al, bl + out dx, al + pop dx + push dx + mov bx, dx + mov dx, # VGAREG_DAC_DATA +read_dac_loop: + in al, dx + seg es + mov [bx], al + inc bx + in al, dx + seg es + mov [bx], al + inc bx + in al, dx + seg es + mov [bx], al + inc bx + dec cx + jnz read_dac_loop + pop dx + pop cx + pop bx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_set_pel_mask: + push ax + push dx + mov dx, # VGAREG_PEL_MASK + mov al, bl + out dx, al + pop dx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_read_pel_mask: + push ax + push dx + mov dx, # VGAREG_PEL_MASK + in al, dx + mov bl, al + pop dx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_read_video_dac_state: + push ax + push dx + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, #0x10 + out dx, al + mov dx, # VGAREG_ACTL_READ_DATA + in al, dx + mov bl, al + shr bl, 7 + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, #0x14 + out dx, al + mov dx, # VGAREG_ACTL_READ_DATA + in al, dx + mov bh, al + and bh, #0x0f + test bl, #0x01 + jnz get_dac_16_page + shr bh, 2 +get_dac_16_page: + mov dx, # VGAREG_ACTL_RESET + in al, dx + mov dx, # VGAREG_ACTL_ADDRESS + mov al, #0x20 + out dx, al + pop dx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +static void biosfn_perform_gray_scale_summing (start,count) +Bit16u start;Bit16u count; +{Bit8u r,g,b; + Bit16u i; + Bit16u index; + + inb(VGAREG_ACTL_RESET); + outb(VGAREG_ACTL_ADDRESS,0x00); + + for( index = 0; index < count; index++ ) + { + // set read address and switch to read mode + outb(VGAREG_DAC_READ_ADDRESS,start); + // get 6-bit wide RGB data values + r=inb( VGAREG_DAC_DATA ); + g=inb( VGAREG_DAC_DATA ); + b=inb( VGAREG_DAC_DATA ); + + // intensity = ( 0.3 * Red ) + ( 0.59 * Green ) + ( 0.11 * Blue ) + i = ( ( 77*r + 151*g + 28*b ) + 0x80 ) >> 8; + + if(i>0x3f)i=0x3f; + + // set write address and switch to write mode + outb(VGAREG_DAC_WRITE_ADDRESS,start); + // write new intensity value + outb( VGAREG_DAC_DATA, i&0xff ); + outb( VGAREG_DAC_DATA, i&0xff ); + outb( VGAREG_DAC_DATA, i&0xff ); + start++; + } + inb(VGAREG_ACTL_RESET); + outb(VGAREG_ACTL_ADDRESS,0x20); +} + +// -------------------------------------------------------------------------------------------- +static void get_font_access() +{ +ASM_START + mov dx, # VGAREG_SEQU_ADDRESS + mov ax, #0x0100 + out dx, ax + mov ax, #0x0402 + out dx, ax + mov ax, #0x0704 + out dx, ax + mov ax, #0x0300 + out dx, ax + mov dx, # VGAREG_GRDC_ADDRESS + mov ax, #0x0204 + out dx, ax + mov ax, #0x0005 + out dx, ax + mov ax, #0x0406 + out dx, ax +ASM_END +} + +static void release_font_access() +{ +ASM_START + mov dx, # VGAREG_SEQU_ADDRESS + mov ax, #0x0100 + out dx, ax + mov ax, #0x0302 + out dx, ax + mov ax, #0x0304 + out dx, ax + mov ax, #0x0300 + out dx, ax + mov dx, # VGAREG_READ_MISC_OUTPUT + in al, dx + and al, #0x01 + shl al, 2 + or al, #0x0a + mov ah, al + mov al, #0x06 + mov dx, # VGAREG_GRDC_ADDRESS + out dx, ax + mov ax, #0x0004 + out dx, ax + mov ax, #0x1005 + out dx, ax +ASM_END +} + +ASM_START +idiv_u: + xor dx,dx + div bx + ret +ASM_END + +static void set_scan_lines(lines) Bit8u lines; +{ + Bit16u crtc_addr,cols,page,vde; + Bit8u crtc_r9,ovl,rows; + + crtc_addr = read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS); + outb(crtc_addr, 0x09); + crtc_r9 = inb(crtc_addr+1); + crtc_r9 = (crtc_r9 & 0xe0) | (lines - 1); + outb(crtc_addr+1, crtc_r9); + if(lines==8) + { + biosfn_set_cursor_shape(0x06,0x07); + } + else + { + biosfn_set_cursor_shape(lines-4,lines-3); + } + write_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT, lines); + outb(crtc_addr, 0x12); + vde = inb(crtc_addr+1); + outb(crtc_addr, 0x07); + ovl = inb(crtc_addr+1); + vde += (((ovl & 0x02) << 7) + ((ovl & 0x40) << 3) + 1); + rows = vde / lines; + write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, rows-1); + cols = read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS); + write_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE, rows * cols * 2); +} + +static void biosfn_load_text_user_pat (AL,ES,BP,CX,DX,BL,BH) Bit8u AL;Bit16u ES;Bit16u BP;Bit16u CX;Bit16u DX;Bit8u BL;Bit8u BH; +{ + Bit16u blockaddr,dest,i,src; + + get_font_access(); + blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11); + for(i=0;i<CX;i++) + { + src = BP + i * BH; + dest = blockaddr + (DX + i) * 32; + memcpyb(0xA000, dest, ES, src, BH); + } + release_font_access(); + if(AL>=0x10) + { + set_scan_lines(BH); + } +} + +static void biosfn_load_text_8_14_pat (AL,BL) Bit8u AL;Bit8u BL; +{ + Bit16u blockaddr,dest,i,src; + + get_font_access(); + blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11); + for(i=0;i<0x100;i++) + { + src = i * 14; + dest = blockaddr + i * 32; + memcpyb(0xA000, dest, 0xC000, vgafont14+src, 14); + } + release_font_access(); + if(AL>=0x10) + { + set_scan_lines(14); + } +} + +static void biosfn_load_text_8_8_pat (AL,BL) Bit8u AL;Bit8u BL; +{ + Bit16u blockaddr,dest,i,src; + + get_font_access(); + blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11); + for(i=0;i<0x100;i++) + { + src = i * 8; + dest = blockaddr + i * 32; + memcpyb(0xA000, dest, 0xC000, vgafont8+src, 8); + } + release_font_access(); + if(AL>=0x10) + { + set_scan_lines(8); + } +} + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_set_text_block_specifier: + push ax + push dx + mov dx, # VGAREG_SEQU_ADDRESS + mov ah, bl + mov al, #0x03 + out dx, ax + pop dx + pop ax + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +static void biosfn_load_text_8_16_pat (AL,BL) Bit8u AL;Bit8u BL; +{ + Bit16u blockaddr,dest,i,src; + + get_font_access(); + blockaddr = ((BL & 0x03) << 14) + ((BL & 0x04) << 11); + for(i=0;i<0x100;i++) + { + src = i * 16; + dest = blockaddr + i * 32; + memcpyb(0xA000, dest, 0xC000, vgafont16+src, 16); + } + release_font_access(); + if(AL>=0x10) + { + set_scan_lines(16); + } +} + +static void biosfn_load_gfx_8_8_chars (ES,BP) Bit16u ES;Bit16u BP; +{ +#ifdef DEBUG + unimplemented(); +#endif +} +static void biosfn_load_gfx_user_chars (ES,BP,CX,BL,DL) Bit16u ES;Bit16u BP;Bit16u CX;Bit8u BL;Bit8u DL; +{ +#ifdef DEBUG + unimplemented(); +#endif +} +static void biosfn_load_gfx_8_14_chars (BL) Bit8u BL; +{ +#ifdef DEBUG + unimplemented(); +#endif +} +static void biosfn_load_gfx_8_8_dd_chars (BL) Bit8u BL; +{ +#ifdef DEBUG + unimplemented(); +#endif +} +static void biosfn_load_gfx_8_16_chars (BL) Bit8u BL; +{ +#ifdef DEBUG + unimplemented(); +#endif +} +// -------------------------------------------------------------------------------------------- +static void biosfn_get_font_info (BH,ES,BP,CX,DX) +Bit8u BH;Bit16u *ES;Bit16u *BP;Bit16u *CX;Bit16u *DX; +{Bit16u ss=get_SS(); + + switch(BH) + {case 0x00: + write_word(ss,ES,read_word(0x00,0x1f*4)); + write_word(ss,BP,read_word(0x00,(0x1f*4)+2)); + break; + case 0x01: + write_word(ss,ES,read_word(0x00,0x43*4)); + write_word(ss,BP,read_word(0x00,(0x43*4)+2)); + break; + case 0x02: + write_word(ss,ES,0xC000); + write_word(ss,BP,vgafont14); + break; + case 0x03: + write_word(ss,ES,0xC000); + write_word(ss,BP,vgafont8); + break; + case 0x04: + write_word(ss,ES,0xC000); + write_word(ss,BP,vgafont8+128*8); + break; + case 0x05: + write_word(ss,ES,0xC000); + write_word(ss,BP,vgafont14alt); + break; + case 0x06: + write_word(ss,ES,0xC000); + write_word(ss,BP,vgafont16); + break; + case 0x07: + write_word(ss,ES,0xC000); + write_word(ss,BP,vgafont16alt); + break; + default: + #ifdef DEBUG + printf("Get font info BH(%02x) was discarded\n",BH); + #endif + return; + } + // Set byte/char of on screen font + write_word(ss,CX,(Bit16u)read_byte(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT)); + + // Set Highest char row + write_word(ss,DX,(Bit16u)read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)); +} + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_get_ega_info: + push ds + push ax + mov ax, # BIOSMEM_SEG + mov ds, ax + xor ch, ch + mov bx, # BIOSMEM_SWITCHES + mov cl, [bx] + and cl, #0x0f + mov bx, # BIOSMEM_CRTC_ADDRESS + mov ax, [bx] + mov bx, #0x0003 + cmp ax, # VGAREG_MDA_CRTC_ADDRESS + jne mode_ega_color + mov bh, #0x01 +mode_ega_color: + pop ax + pop ds + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +static void biosfn_alternate_prtsc() +{ +#ifdef DEBUG + unimplemented(); +#endif +} + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_select_vert_res: + +; res : 00 200 lines, 01 350 lines, 02 400 lines + + push ds + push bx + push dx + mov dl, al + mov ax, # BIOSMEM_SEG + mov ds, ax + mov bx, # BIOSMEM_MODESET_CTL + mov al, [bx] + mov bx, # BIOSMEM_SWITCHES + mov ah, [bx] + cmp dl, #0x01 + je vert_res_350 + jb vert_res_200 + cmp dl, #0x02 + je vert_res_400 +#ifdef DEBUG + mov al, dl + xor ah, ah + push ax + mov bx, #msg_vert_res + push bx + call _printf + add sp, #4 +#endif + jmp set_retcode +vert_res_400: + + ; reset modeset ctl bit 7 and set bit 4 + ; set switches bit 3-0 to 0x09 + + and al, #0x7f + or al, #0x10 + and ah, #0xf0 + or ah, #0x09 + jnz set_vert_res +vert_res_350: + + ; reset modeset ctl bit 7 and bit 4 + ; set switches bit 3-0 to 0x09 + + and al, #0x6f + and ah, #0xf0 + or ah, #0x09 + jnz set_vert_res +vert_res_200: + + ; set modeset ctl bit 7 and reset bit 4 + ; set switches bit 3-0 to 0x08 + + and al, #0xef + or al, #0x80 + and ah, #0xf0 + or ah, #0x08 +set_vert_res: + mov bx, # BIOSMEM_MODESET_CTL + mov [bx], al + mov bx, # BIOSMEM_SWITCHES + mov [bx], ah +set_retcode: + mov ax, #0x1212 + pop dx + pop bx + pop ds + ret + +#ifdef DEBUG +msg_vert_res: +.ascii "Select vert res (%02x) was discarded" +.byte 0x0d,0x0a,0x00 +#endif + + +biosfn_enable_default_palette_loading: + push ds + push bx + push dx + mov dl, al + and dl, #0x01 + shl dl, 3 + mov ax, # BIOSMEM_SEG + mov ds, ax + mov bx, # BIOSMEM_MODESET_CTL + mov al, [bx] + and al, #0xf7 + or al, dl + mov [bx], al + mov ax, #0x1212 + pop dx + pop bx + pop ds + ret + + +biosfn_enable_video_addressing: + push bx + push dx + mov bl, al + and bl, #0x01 + xor bl, #0x01 + shl bl, 1 + mov dx, # VGAREG_READ_MISC_OUTPUT + in al, dx + and al, #0xfd + or al, bl + mov dx, # VGAREG_WRITE_MISC_OUTPUT + out dx, al + mov ax, #0x1212 + pop dx + pop bx + ret + + +biosfn_enable_grayscale_summing: + push ds + push bx + push dx + mov dl, al + and dl, #0x01 + xor dl, #0x01 + shl dl, 1 + mov ax, # BIOSMEM_SEG + mov ds, ax + mov bx, # BIOSMEM_MODESET_CTL + mov al, [bx] + and al, #0xfd + or al, dl + mov [bx], al + mov ax, #0x1212 + pop dx + pop bx + pop ds + ret + + +biosfn_enable_cursor_emulation: + push ds + push bx + push dx + mov dl, al + and dl, #0x01 + xor dl, #0x01 + mov ax, # BIOSMEM_SEG + mov ds, ax + mov bx, # BIOSMEM_MODESET_CTL + mov al, [bx] + and al, #0xfe + or al, dl + mov [bx], al + mov ax, #0x1212 + pop dx + pop bx + pop ds + ret +ASM_END + +// -------------------------------------------------------------------------------------------- +static void biosfn_switch_video_interface (AL,ES,DX) Bit8u AL;Bit16u ES;Bit16u DX; +{ +#ifdef DEBUG + unimplemented(); +#endif +} +static void biosfn_enable_video_refresh_control (AL) Bit8u AL; +{ +#ifdef DEBUG + unimplemented(); +#endif +} + +// -------------------------------------------------------------------------------------------- +static void biosfn_write_string (flag,page,attr,count,row,col,seg,offset) +Bit8u flag;Bit8u page;Bit8u attr;Bit16u count;Bit8u row;Bit8u col;Bit16u seg;Bit16u offset; +{ + Bit16u newcurs,oldcurs,dummy; + Bit8u car,carattr; + + // Read curs info for the page + biosfn_get_cursor_pos(page,&dummy,&oldcurs); + + // if row=0xff special case : use current cursor position + if(row==0xff) + {col=oldcurs&0x00ff; + row=(oldcurs&0xff00)>>8; + } + + newcurs=row; newcurs<<=8; newcurs+=col; + biosfn_set_cursor_pos(page,newcurs); + + while(count--!=0) + { + car=read_byte(seg,offset++); + if((flag&0x02)!=0) + attr=read_byte(seg,offset++); + + biosfn_write_teletype(car,page,attr,WITH_ATTR); + } + + // Set back curs pos + if((flag&0x01)==0) + biosfn_set_cursor_pos(page,oldcurs); +} + +// -------------------------------------------------------------------------------------------- +ASM_START +biosfn_group_1A: + cmp al, #0x00 + je biosfn_read_display_code + cmp al, #0x01 + je biosfn_set_display_code +#ifdef DEBUG + call _unknown +#endif + ret +biosfn_read_display_code: + push ds + push ax + mov ax, # BIOSMEM_SEG + mov ds, ax + mov bx, # BIOSMEM_DCC_INDEX + mov al, [bx] + mov bl, al + xor bh, bh + pop ax + mov al, ah + pop ds + ret +biosfn_set_display_code: + push ds + push ax + push bx + mov ax, # BIOSMEM_SEG + mov ds, ax + mov ax, bx + mov bx, # BIOSMEM_DCC_INDEX + mov [bx], al +#ifdef DEBUG + mov al, ah + xor ah, ah + push ax + mov bx, #msg_alt_dcc + push bx + call _printf + add sp, #4 +#endif + pop bx + pop ax + mov al, ah + pop ds + ret + +#ifdef DEBUG +msg_alt_dcc: +.ascii "Alternate Display code (%02x) was discarded" +.byte 0x0d,0x0a,0x00 +#endif +ASM_END + +// -------------------------------------------------------------------------------------------- +static void biosfn_read_state_info (BX,ES,DI) +Bit16u BX;Bit16u ES;Bit16u DI; +{ + // Address of static functionality table + write_word(ES,DI+0x00,&static_functionality); + write_word(ES,DI+0x02,0xC000); + + // Hard coded copy from BIOS area. Should it be cleaner ? + memcpyb(ES,DI+0x04,BIOSMEM_SEG,0x49,30); + memcpyb(ES,DI+0x22,BIOSMEM_SEG,0x84,3); + + write_byte(ES,DI+0x25,read_byte(BIOSMEM_SEG,BIOSMEM_DCC_INDEX)); + write_byte(ES,DI+0x26,0); + write_byte(ES,DI+0x27,16); + write_byte(ES,DI+0x28,0); + write_byte(ES,DI+0x29,8); + write_byte(ES,DI+0x2a,2); + write_byte(ES,DI+0x2b,0); + write_byte(ES,DI+0x2c,0); + write_byte(ES,DI+0x31,3); + write_byte(ES,DI+0x32,0); + + memsetb(ES,DI+0x33,0,13); +} + +// -------------------------------------------------------------------------------------------- +// -------------------------------------------------------------------------------------------- +static Bit16u biosfn_read_video_state_size2 (CX) + Bit16u CX; +{ + Bit16u size; + size = 0; + if (CX & 1) { + size += 0x46; + } + if (CX & 2) { + size += (5 + 8 + 5) * 2 + 6; + } + if (CX & 4) { + size += 3 + 256 * 3 + 1; +} + return size; +} + +static void biosfn_read_video_state_size (CX, BX) + Bit16u CX; Bit16u *BX; +{ + Bit16u ss=get_SS(); + write_word(ss, BX, biosfn_read_video_state_size2(CX)); +} + +static Bit16u biosfn_save_video_state (CX,ES,BX) + Bit16u CX;Bit16u ES;Bit16u BX; +{ + Bit16u i, v, crtc_addr, ar_index; + + crtc_addr = read_word(BIOSMEM_SEG, BIOSMEM_CRTC_ADDRESS); + if (CX & 1) { + write_byte(ES, BX, inb(VGAREG_SEQU_ADDRESS)); BX++; + write_byte(ES, BX, inb(crtc_addr)); BX++; + write_byte(ES, BX, inb(VGAREG_GRDC_ADDRESS)); BX++; + inb(VGAREG_ACTL_RESET); + ar_index = inb(VGAREG_ACTL_ADDRESS); + write_byte(ES, BX, ar_index); BX++; + write_byte(ES, BX, inb(VGAREG_READ_FEATURE_CTL)); BX++; + + for(i=1;i<=4;i++){ + outb(VGAREG_SEQU_ADDRESS, i); + write_byte(ES, BX, inb(VGAREG_SEQU_DATA)); BX++; + } + outb(VGAREG_SEQU_ADDRESS, 0); + write_byte(ES, BX, inb(VGAREG_SEQU_DATA)); BX++; + + for(i=0;i<=0x18;i++) { + outb(crtc_addr,i); + write_byte(ES, BX, inb(crtc_addr+1)); BX++; + } + + for(i=0;i<=0x13;i++) { + inb(VGAREG_ACTL_RESET); + outb(VGAREG_ACTL_ADDRESS, i | (ar_index & 0x20)); + write_byte(ES, BX, inb(VGAREG_ACTL_READ_DATA)); BX++; + } + inb(VGAREG_ACTL_RESET); + + for(i=0;i<=8;i++) { + outb(VGAREG_GRDC_ADDRESS,i); + write_byte(ES, BX, inb(VGAREG_GRDC_DATA)); BX++; + } + + write_word(ES, BX, crtc_addr); BX+= 2; + + /* XXX: read plane latches */ + write_byte(ES, BX, 0); BX++; + write_byte(ES, BX, 0); BX++; + write_byte(ES, BX, 0); BX++; + write_byte(ES, BX, 0); BX++; + } + if (CX & 2) { + write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE)); BX++; + write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_NB_COLS)); BX += 2; + write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE)); BX += 2; + write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS)); BX += 2; + write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS)); BX++; + write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT)); BX += 2; + write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL)); BX++; + write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES)); BX++; + write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL)); BX++; + write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE)); BX += 2; + for(i=0;i<8;i++) { + write_word(ES, BX, read_word(BIOSMEM_SEG, BIOSMEM_CURSOR_POS+2*i)); + BX += 2; + } + write_word(ES, BX, read_word(BIOSMEM_SEG,BIOSMEM_CURRENT_START)); BX += 2; + write_byte(ES, BX, read_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE)); BX++; + /* current font */ + write_word(ES, BX, read_word(0, 0x1f * 4)); BX += 2; + write_word(ES, BX, read_word(0, 0x1f * 4 + 2)); BX += 2; + write_word(ES, BX, read_word(0, 0x43 * 4)); BX += 2; + write_word(ES, BX, read_word(0, 0x43 * 4 + 2)); BX += 2; + } + if (CX & 4) { + /* XXX: check this */ + write_byte(ES, BX, inb(VGAREG_DAC_STATE)); BX++; /* read/write mode dac */ + write_byte(ES, BX, inb(VGAREG_DAC_WRITE_ADDRESS)); BX++; /* pix address */ + write_byte(ES, BX, inb(VGAREG_PEL_MASK)); BX++; + // Set the whole dac always, from 0 + outb(VGAREG_DAC_WRITE_ADDRESS,0x00); + for(i=0;i<256*3;i++) { + write_byte(ES, BX, inb(VGAREG_DAC_DATA)); BX++; + } + write_byte(ES, BX, 0); BX++; /* color select register */ + } + return BX; +} + +static Bit16u biosfn_restore_video_state (CX,ES,BX) + Bit16u CX;Bit16u ES;Bit16u BX; +{ + Bit16u i, crtc_addr, v, addr1, ar_index; + + if (CX & 1) { + // Reset Attribute Ctl flip-flop + inb(VGAREG_ACTL_RESET); + + crtc_addr = read_word(ES, BX + 0x40); + addr1 = BX; + BX += 5; + + for(i=1;i<=4;i++){ + outb(VGAREG_SEQU_ADDRESS, i); + outb(VGAREG_SEQU_DATA, read_byte(ES, BX)); BX++; + } + outb(VGAREG_SEQU_ADDRESS, 0); + outb(VGAREG_SEQU_DATA, read_byte(ES, BX)); BX++; + + // Disable CRTC write protection + outw(crtc_addr,0x0011); + // Set CRTC regs + for(i=0;i<=0x18;i++) { + if (i != 0x11) { + outb(crtc_addr,i); + outb(crtc_addr+1, read_byte(ES, BX)); + } + BX++; + } + // select crtc base address + v = inb(VGAREG_READ_MISC_OUTPUT) & ~0x01; + if (crtc_addr = 0x3d4) + v |= 0x01; + outb(VGAREG_WRITE_MISC_OUTPUT, v); + + // enable write protection if needed + outb(crtc_addr, 0x11); + outb(crtc_addr+1, read_byte(ES, BX - 0x18 + 0x11)); + + // Set Attribute Ctl + ar_index = read_byte(ES, addr1 + 0x03); + inb(VGAREG_ACTL_RESET); + for(i=0;i<=0x13;i++) { + outb(VGAREG_ACTL_ADDRESS, i | (ar_index & 0x20)); + outb(VGAREG_ACTL_WRITE_DATA, read_byte(ES, BX)); BX++; + } + outb(VGAREG_ACTL_ADDRESS, ar_index); + inb(VGAREG_ACTL_RESET); + + for(i=0;i<=8;i++) { + outb(VGAREG_GRDC_ADDRESS,i); + outb(VGAREG_GRDC_DATA, read_byte(ES, BX)); BX++; + } + BX += 2; /* crtc_addr */ + BX += 4; /* plane latches */ + + outb(VGAREG_SEQU_ADDRESS, read_byte(ES, addr1)); addr1++; + outb(crtc_addr, read_byte(ES, addr1)); addr1++; + outb(VGAREG_GRDC_ADDRESS, read_byte(ES, addr1)); addr1++; + addr1++; + outb(crtc_addr - 0x4 + 0xa, read_byte(ES, addr1)); addr1++; + } + if (CX & 2) { + write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_MODE, read_byte(ES, BX)); BX++; + write_word(BIOSMEM_SEG,BIOSMEM_NB_COLS, read_word(ES, BX)); BX += 2; + write_word(BIOSMEM_SEG,BIOSMEM_PAGE_SIZE, read_word(ES, BX)); BX += 2; + write_word(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS, read_word(ES, BX)); BX += 2; + write_byte(BIOSMEM_SEG,BIOSMEM_NB_ROWS, read_byte(ES, BX)); BX++; + write_word(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT, read_word(ES, BX)); BX += 2; + write_byte(BIOSMEM_SEG,BIOSMEM_VIDEO_CTL, read_byte(ES, BX)); BX++; + write_byte(BIOSMEM_SEG,BIOSMEM_SWITCHES, read_byte(ES, BX)); BX++; + write_byte(BIOSMEM_SEG,BIOSMEM_MODESET_CTL, read_byte(ES, BX)); BX++; + write_word(BIOSMEM_SEG,BIOSMEM_CURSOR_TYPE, read_word(ES, BX)); BX += 2; + for(i=0;i<8;i++) { + write_word(BIOSMEM_SEG, BIOSMEM_CURSOR_POS+2*i, read_word(ES, BX)); + BX += 2; + } + write_word(BIOSMEM_SEG,BIOSMEM_CURRENT_START, read_word(ES, BX)); BX += 2; + write_byte(BIOSMEM_SEG,BIOSMEM_CURRENT_PAGE, read_byte(ES, BX)); BX++; + /* current font */ + write_word(0, 0x1f * 4, read_word(ES, BX)); BX += 2; + write_word(0, 0x1f * 4 + 2, read_word(ES, BX)); BX += 2; + write_word(0, 0x43 * 4, read_word(ES, BX)); BX += 2; + write_word(0, 0x43 * 4 + 2, read_word(ES, BX)); BX += 2; + } + if (CX & 4) { + BX++; + v = read_byte(ES, BX); BX++; + outb(VGAREG_PEL_MASK, read_byte(ES, BX)); BX++; + // Set the whole dac always, from 0 + outb(VGAREG_DAC_WRITE_ADDRESS,0x00); + for(i=0;i<256*3;i++) { + outb(VGAREG_DAC_DATA, read_byte(ES, BX)); BX++; + } + BX++; + outb(VGAREG_DAC_WRITE_ADDRESS, v); + } + return BX; +} + +// ============================================================================================ +// +// Video Utils +// +// ============================================================================================ + +// -------------------------------------------------------------------------------------------- +static Bit8u find_vga_entry(mode) +Bit8u mode; +{ + Bit8u i,line=0xFF; + for(i=0;i<=MODE_MAX;i++) + if(vga_modes[i].svgamode==mode) + {line=i; + break; + } + return line; +} + +/* =========================================================== */ +/* + * Misc Utils +*/ +/* =========================================================== */ + +// -------------------------------------------------------------------------------------------- +static void memsetb(seg,offset,value,count) + Bit16u seg; + Bit16u offset; + Bit16u value; + Bit16u count; +{ +ASM_START + push bp + mov bp, sp + + push ax + push cx + push es + push di + + mov cx, 10[bp] ; count + cmp cx, #0x00 + je memsetb_end + mov ax, 4[bp] ; segment + mov es, ax + mov ax, 6[bp] ; offset + mov di, ax + mov al, 8[bp] ; value + cld + rep + stosb + +memsetb_end: + pop di + pop es + pop cx + pop ax + + pop bp +ASM_END +} + +// -------------------------------------------------------------------------------------------- +static void memsetw(seg,offset,value,count) + Bit16u seg; + Bit16u offset; + Bit16u value; + Bit16u count; +{ +ASM_START + push bp + mov bp, sp + + push ax + push cx + push es + push di + + mov cx, 10[bp] ; count + cmp cx, #0x00 + je memsetw_end + mov ax, 4[bp] ; segment + mov es, ax + mov ax, 6[bp] ; offset + mov di, ax + mov ax, 8[bp] ; value + cld + rep + stosw + +memsetw_end: + pop di + pop es + pop cx + pop ax + + pop bp +ASM_END +} + +// -------------------------------------------------------------------------------------------- +static void memcpyb(dseg,doffset,sseg,soffset,count) + Bit16u dseg; + Bit16u doffset; + Bit16u sseg; + Bit16u soffset; + Bit16u count; +{ +ASM_START + push bp + mov bp, sp + + push ax + push cx + push es + push di + push ds + push si + + mov cx, 12[bp] ; count + cmp cx, #0x0000 + je memcpyb_end + mov ax, 4[bp] ; dsegment + mov es, ax + mov ax, 6[bp] ; doffset + mov di, ax + mov ax, 8[bp] ; ssegment + mov ds, ax + mov ax, 10[bp] ; soffset + mov si, ax + cld + rep + movsb + +memcpyb_end: + pop si + pop ds + pop di + pop es + pop cx + pop ax + + pop bp +ASM_END +} + +// -------------------------------------------------------------------------------------------- +static void memcpyw(dseg,doffset,sseg,soffset,count) + Bit16u dseg; + Bit16u doffset; + Bit16u sseg; + Bit16u soffset; + Bit16u count; +{ +ASM_START + push bp + mov bp, sp + + push ax + push cx + push es + push di + push ds + push si + + mov cx, 12[bp] ; count + cmp cx, #0x0000 + je memcpyw_end + mov ax, 4[bp] ; dsegment + mov es, ax + mov ax, 6[bp] ; doffset + mov di, ax + mov ax, 8[bp] ; ssegment + mov ds, ax + mov ax, 10[bp] ; soffset + mov si, ax + cld + rep + movsw + +memcpyw_end: + pop si + pop ds + pop di + pop es + pop cx + pop ax + + pop bp +ASM_END +} + +/* =========================================================== */ +/* + * These functions where ripped from Kevin's rombios.c +*/ +/* =========================================================== */ + +// -------------------------------------------------------------------------------------------- +static Bit8u +read_byte(seg, offset) + Bit16u seg; + Bit16u offset; +{ +ASM_START + push bp + mov bp, sp + + push bx + push ds + mov ax, 4[bp] ; segment + mov ds, ax + mov bx, 6[bp] ; offset + mov al, [bx] + ;; al = return value (byte) + pop ds + pop bx + + pop bp +ASM_END +} + +// -------------------------------------------------------------------------------------------- +static Bit16u +read_word(seg, offset) + Bit16u seg; + Bit16u offset; +{ +ASM_START + push bp + mov bp, sp + + push bx + push ds + mov ax, 4[bp] ; segment + mov ds, ax + mov bx, 6[bp] ; offset + mov ax, [bx] + ;; ax = return value (word) + pop ds + pop bx + + pop bp +ASM_END +} + +// -------------------------------------------------------------------------------------------- +static void +write_byte(seg, offset, data) + Bit16u seg; + Bit16u offset; + Bit8u data; +{ +ASM_START + push bp + mov bp, sp + + push ax + push bx + push ds + mov ax, 4[bp] ; segment + mov ds, ax + mov bx, 6[bp] ; offset + mov al, 8[bp] ; data byte + mov [bx], al ; write data byte + pop ds + pop bx + pop ax + + pop bp +ASM_END +} + +// -------------------------------------------------------------------------------------------- +static void +write_word(seg, offset, data) + Bit16u seg; + Bit16u offset; + Bit16u data; +{ +ASM_START + push bp + mov bp, sp + + push ax + push bx + push ds + mov ax, 4[bp] ; segment + mov ds, ax + mov bx, 6[bp] ; offset + mov ax, 8[bp] ; data word + mov [bx], ax ; write data word + pop ds + pop bx + pop ax + + pop bp +ASM_END +} + +// -------------------------------------------------------------------------------------------- + Bit8u +inb(port) + Bit16u port; +{ +ASM_START + push bp + mov bp, sp + + push dx + mov dx, 4[bp] + in al, dx + pop dx + + pop bp +ASM_END +} + + Bit16u +inw(port) + Bit16u port; +{ +ASM_START + push bp + mov bp, sp + + push dx + mov dx, 4[bp] + in ax, dx + pop dx + + pop bp +ASM_END +} + +// -------------------------------------------------------------------------------------------- + void +outb(port, val) + Bit16u port; + Bit8u val; +{ +ASM_START + push bp + mov bp, sp + + push ax + push dx + mov dx, 4[bp] + mov al, 6[bp] + out dx, al + pop dx + pop ax + + pop bp +ASM_END +} + +// -------------------------------------------------------------------------------------------- + void +outw(port, val) + Bit16u port; + Bit16u val; +{ +ASM_START + push bp + mov bp, sp + + push ax + push dx + mov dx, 4[bp] + mov ax, 6[bp] + out dx, ax + pop dx + pop ax + + pop bp +ASM_END +} + +Bit16u get_SS() +{ +ASM_START + mov ax, ss +ASM_END +} + +#ifdef DEBUG +void unimplemented() +{ + printf("--> Unimplemented\n"); +} + +void unknown() +{ + printf("--> Unknown int10\n"); +} +#endif + +// -------------------------------------------------------------------------------------------- +#if defined(USE_BX_INFO) || defined(DEBUG) || defined(CIRRUS_DEBUG) +void printf(s) + Bit8u *s; +{ + Bit8u c, format_char; + Boolean in_format; + unsigned format_width, i; + Bit16u *arg_ptr; + Bit16u arg_seg, arg, digit, nibble, shift_count; + + arg_ptr = &s; + arg_seg = get_SS(); + + in_format = 0; + format_width = 0; + + while (c = read_byte(0xc000, s)) { + if ( c == '%' ) { + in_format = 1; + format_width = 0; + } + else if (in_format) { + if ( (c>='0') && (c<='9') ) { + format_width = (format_width * 10) + (c - '0'); + } + else if (c == 'x') { + arg_ptr++; // increment to next arg + arg = read_word(arg_seg, arg_ptr); + if (format_width == 0) + format_width = 4; + i = 0; + digit = format_width - 1; + for (i=0; i<format_width; i++) { + nibble = (arg >> (4 * digit)) & 0x000f; + if (nibble <= 9) + outb(0x0500, nibble + '0'); + else + outb(0x0500, (nibble - 10) + 'A'); + digit--; + } + in_format = 0; + } + //else if (c == 'd') { + // in_format = 0; + // } + } + else { + outb(0x0500, c); + } + s ++; + } +} +#endif + +ASM_START + ; get LFB address from PCI + ; in - ax: PCI device vendor + ; out - ax: LFB address (high 16 bit) + ;; NOTE - may be called in protected mode +_pci_get_lfb_addr: + push bx + push cx + push dx + push eax + mov bx, ax + xor cx, cx + mov dl, #0x00 + call pci_read_reg + cmp ax, #0xffff + jz pci_get_lfb_addr_fail + pci_get_lfb_addr_next_dev: + mov dl, #0x00 + call pci_read_reg + cmp ax, bx ;; check vendor + jz pci_get_lfb_addr_found + add cx, #0x8 + cmp cx, #0x200 ;; search bus #0 and #1 + jb pci_get_lfb_addr_next_dev + pci_get_lfb_addr_fail: + xor dx, dx ;; no LFB + jmp pci_get_lfb_addr_return + pci_get_lfb_addr_found: + mov dl, #0x10 ;; I/O space #0 + call pci_read_reg + test ax, #0xfff1 + jz pci_get_lfb_addr_success + mov dl, #0x14 ;; I/O space #1 + call pci_read_reg + test ax, #0xfff1 + jnz pci_get_lfb_addr_fail + pci_get_lfb_addr_success: + shr eax, #16 + mov dx, ax ;; LFB address + pci_get_lfb_addr_return: + pop eax + mov ax, dx + pop dx + pop cx + pop bx + ret + + ; read PCI register + ; in - cx: device/function + ; in - dl: register + ; out - eax: value +pci_read_reg: + mov eax, #0x00800000 + mov ax, cx + shl eax, #8 + mov al, dl + mov dx, #0xcf8 + out dx, eax + add dl, #4 + in eax, dx + ret +ASM_END + +#ifdef VBE +#include "vbe.c" +#endif + +#ifdef CIRRUS +#include "clext.c" +#endif + +// -------------------------------------------------------------------------------------------- + +ASM_START +;; DATA_SEG_DEFS_HERE +ASM_END + +ASM_START +.ascii "vgabios ends here" +.byte 0x00 +vgabios_end: +.byte 0xCB +;; BLOCK_STRINGS_BEGIN +ASM_END |