diff options
Diffstat (limited to 'qemu/roms/SLOF/board-js2x/slof/helper.fs')
| -rw-r--r-- | qemu/roms/SLOF/board-js2x/slof/helper.fs | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/qemu/roms/SLOF/board-js2x/slof/helper.fs b/qemu/roms/SLOF/board-js2x/slof/helper.fs index 34d60da1f..1e2b03063 100644 --- a/qemu/roms/SLOF/board-js2x/slof/helper.fs +++ b/qemu/roms/SLOF/board-js2x/slof/helper.fs @@ -26,3 +26,14 @@ s" , " $cat bdate2human $cat encode-string THEN ; + +: invert-region ( addr len -- ) + 2dup or 7 and CASE + 0 OF 3 rshift 0 ?DO dup dup rx@ -1 xor swap rx! xa1+ LOOP ENDOF + 4 OF 2 rshift 0 ?DO dup dup rl@ -1 xor swap rl! la1+ LOOP ENDOF + 3 and + 2 OF 1 rshift 0 ?DO dup dup rw@ -1 xor swap rw! wa1+ LOOP ENDOF + dup OF 0 ?DO dup dup rb@ -1 xor swap rb! 1+ LOOP ENDOF + ENDCASE + drop +; |