diff options
Diffstat (limited to 'qemu/roms/openbios/drivers/vga_set_mode.c')
| -rw-r--r-- | qemu/roms/openbios/drivers/vga_set_mode.c | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/qemu/roms/openbios/drivers/vga_set_mode.c b/qemu/roms/openbios/drivers/vga_set_mode.c deleted file mode 100644 index 339ad2966..000000000 --- a/qemu/roms/openbios/drivers/vga_set_mode.c +++ /dev/null @@ -1,148 +0,0 @@ -/* - * $Id$ - * $Source$ - * - * by - * Steve M. Gehlbach <steve@kesa.com> - * - * These routines set graphics mode and alpha mode - * for switching back and forth. - * - * Register settings are - * more or less as follows: - * - * Register Graphics Alpha - * 16 color - * ------------------------------------------------ - * GDC_MODE 0x00 0x10 - * GDC_MISC 0x05 0x0e - * SEQ_MEMORY_MODE 0x06 0x02 - * SEQ_PLANE_WRITE 0x0f 0x03 - * CRTC_CURSOR_START 0x20 0x00 - * CRTC_CURSOR_END 0x00 CHAR_HEIGHT-1 - * CRTC_MODE 0xe3 0xa3 - * CRTC_MAX_SCAN 0x40 0x40 | CHAR_HEIGHT-1 - * ATC_MODE 0x01 0x0c - * - */ - -#include "asm/io.h" -#include "vga.h" - -void vga_set_gmode (void) { - u8 byte; - - byte = read_att_b(ATC_MODE) & ~0x0f; - write_att(byte|0x1, ATC_MODE); -// -// display is off at this point - - byte = read_seq_b(SEQ_PLANE_WRITE) & ~0xf; - write_seq(byte|0xf,SEQ_PLANE_WRITE); // all planes - byte = read_seq_b(SEQ_MEMORY_MODE); - write_seq(byte|4,SEQ_MEMORY_MODE); - - byte = read_gra_b(GDC_MODE) & ~0x10; - write_gra(byte,GDC_MODE); - write_gra(0x05, GDC_MISC); - - write_crtc(0x20, CRTC_CURSOR_START); - write_crtc(0x00, CRTC_CURSOR_END); - byte = read_crtc_b(CRTC_MODE) & ~0xe0; - write_crtc(byte|0xe0, CRTC_MODE); - byte = read_crtc_b(CRTC_MAX_SCAN) & ~0x01f; - write_crtc(byte, CRTC_MAX_SCAN); - - byte = inb(MIS_R); // get 3c2 value by reading 3cc - outb(byte & ~0xc,MIS_W); // clear last bits to set 25Mhz clock and low page - - -// turn on display, disable access to attr palette - inb(IS1_RC); - outb(0x20, ATT_IW); -} - -void vga_set_amode (void) { - u8 byte; - write_att(0x0c, ATC_MODE); - - //reset palette to normal in the case it was changed - write_att(0x0, ATC_COLOR_PAGE); -// -// display is off at this point - - write_seq(0x3,SEQ_PLANE_WRITE); // planes 0 & 1 - byte = read_seq_b(SEQ_MEMORY_MODE) & ~0x04; - write_seq(byte,SEQ_MEMORY_MODE); - - byte = read_gra_b(GDC_MODE) & ~0x60; - write_gra(byte|0x10,GDC_MODE); - - write_gra(0x0e, GDC_MISC); - - write_crtc(0x00, CRTC_CURSOR_START); - write_crtc(CHAR_HEIGHT-1, CRTC_CURSOR_END); - - byte = read_crtc_b(CRTC_MODE) & ~0xe0; - write_crtc(byte|0xa0, CRTC_MODE); - byte = read_crtc_b(CRTC_MAX_SCAN) & ~0x01f; - write_crtc(byte | (CHAR_HEIGHT-1), CRTC_MAX_SCAN); - - -// turn on display, disable access to attr palette - inb(IS1_RC); - outb(0x20, ATT_IW); -} - -/* - * by Steve M. Gehlbach, Ph.D. <steve@kesa.com> - * - * vga_font_load loads a font into font memory. It - * assumes alpha mode has been set. - * - * The font load code follows technique used - * in the tiara project, which came from - * the Universal Talkware Boot Loader, - * http://www.talkware.net. - */ - -void vga_font_load(unsigned char *vidmem, const unsigned char *font, int height, int num_chars) { - -/* Note: the font table is 'height' long but the font storage area - * is 32 bytes long. - */ - - int i,j; - u8 byte; - - // set sequencer map 2, odd/even off - byte = read_seq_b(SEQ_PLANE_WRITE) & ~0xf; - write_seq(byte|4,SEQ_PLANE_WRITE); - byte = read_seq_b(SEQ_MEMORY_MODE); - write_seq(byte|4,SEQ_MEMORY_MODE); - - // select graphics map 2, odd/even off, map starts at 0xa0000 - write_gra(2,GDC_PLANE_READ); - byte = read_gra_b(GDC_MODE) & ~0x10; - write_gra(byte,GDC_MODE); - write_gra(0,GDC_MISC); - - for (i = 0 ; i < num_chars ; i++) { - for (j = 0 ; j < height ; j++) { - vidmem[i*32+j] = font[i*16+j]; - } - } - - // set sequencer back to maps 0,1, odd/even on - byte = read_seq_b(SEQ_PLANE_WRITE) & ~0xf; - write_seq(byte|3,SEQ_PLANE_WRITE); - byte = read_seq_b(SEQ_MEMORY_MODE) & ~0x4; - write_seq(byte,SEQ_MEMORY_MODE); - - // select graphics back to map 0,1, odd/even on - write_gra(0,GDC_PLANE_READ); - byte = read_gra_b(GDC_MODE); - write_gra(byte|0x10,GDC_MODE); - write_gra(0xe,GDC_MISC); - -} |