diff options
Diffstat (limited to 'memdisk/memdisk.asm')
| -rw-r--r-- | memdisk/memdisk.asm | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/memdisk/memdisk.asm b/memdisk/memdisk.asm index 09055d8f..1d3d39de 100644 --- a/memdisk/memdisk.asm +++ b/memdisk/memdisk.asm @@ -6,7 +6,7 @@ ; A program to emulate an INT 13h disk BIOS from a "disk" in extended ; memory. ; -; Copyright (C) 2001-2006 H. Peter Anvin +; Copyright (C) 2001-2007 H. Peter Anvin ; ; This program is free software; you can redistribute it and/or modify ; it under the terms of the GNU General Public License as published by @@ -152,8 +152,8 @@ Int13Start: mov bp,sp ; Point BP to the entry stack frame TRACER 'F' ; Note: AH == P_AH here - cmp ah,Int13FuncsMax - jae Invalid_jump + cmp ah,[Int13MaxFunc] + ja Invalid_jump xor al,al ; AL = 0 is standard entry condition mov di,ax shr di,7 ; Convert AH to an offset in DI @@ -870,7 +870,7 @@ Int13Funcs dw Reset ; 00h - RESET %endif Int13FuncsEnd equ $ -Int13FuncsMax equ (Int13FuncsEnd-Int13Funcs) >> 1 +Int13FuncsCnt equ (Int13FuncsEnd-Int13Funcs) >> 1 %if EDD EDD_DPT: @@ -933,8 +933,9 @@ OldInt15 dd 0 ; INT 15h in chain OldDosMem dw 0 ; Old position of DOS mem end BootLoaderID db 0 ; Boot loader ID from header ; ---- MDI structure ends here --- - db 0, 0, 0 ; pad +Int13MaxFunc db Int13FuncsCnt-1 ; Max INT 13h function (to disable EDD) + db 0, 0 ; pad MemInt1588 dw 0 ; 1MB-65MB memory amount (1K) Cylinders dw 0 ; Cylinder count |