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- add int15 function 86 support

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This commit is contained in:
Christophe Bothamy 2003-01-18 19:20:52 +00:00
parent 6ff44748da
commit 5e509b80c9
1 changed files with 46 additions and 5 deletions
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51
bochs/bios/rombios.c
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: rombios.c,v 1.89 2003-01-14 18:03:31 cbothamy Exp $
// $Id: rombios.c,v 1.90 2003-01-18 19:20:52 cbothamy Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
@ -928,10 +928,10 @@ Bit16u cdrom_boot();
#endif // BX_ELTORITO_BOOT
static char bios_cvs_version_string[] = "$Revision: 1.89 $";
static char bios_date_string[] = "$Date: 2003-01-14 18:03:31 $";
static char bios_cvs_version_string[] = "$Revision: 1.90 $";
static char bios_date_string[] = "$Date: 2003-01-18 19:20:52 $";
static char CVSID[] = "$Id: rombios.c,v 1.89 2003-01-14 18:03:31 cbothamy Exp $";
static char CVSID[] = "$Id: rombios.c,v 1.90 2003-01-18 19:20:52 cbothamy Exp $";
/* Offset to skip the CVS $Id: prefix */
#define bios_version_string (CVSID + 4)
@ -3321,7 +3321,7 @@ int15_function(regs, ES, DS, FLAGS)
Bit8u ret, mouse_data1, mouse_data2, mouse_data3;
Bit8u comm_byte, mf2_state;
Bit32u extended_memory_size=0; // 64bits long
Bit16u CX;
Bit16u CX,DX;
BX_DEBUG_INT15("int15 AX=%04x\n",regs.u.r16.ax);
@ -3352,6 +3352,47 @@ BX_DEBUG_INT15("int15 AX=%04x\n",regs.u.r16.ax);
regs.u.r8.ah = 0; // "ok ejection may proceed"
break;
case 0x86:
// Wait for CX:DX microseconds. currently using the
// refresh request port 0x61 bit4, toggling every 15usec
CX = regs.u.r16.cx;
DX = regs.u.r16.dx;
ASM_START
sti
;; Get the count in eax
mov bx, sp
SEG SS
mov ax, _int15_function.CX [bx]
shl eax, #16
SEG SS
mov ax, _int15_function.DX [bx]
;; convert to numbers of 15usec ticks
mov ebx, #15
xor edx, edx
div eax, ebx
mov ecx, eax
;; wait for ecx number of refresh requests
in al, #0x61
and al,#0x10
mov ah, al
int1586_tick:
in al, #0x61
and al,#0x10
cmp al, ah
je int1586_tick
mov ah, al
dec ecx
jnz int1586_tick
ASM_END
break;
case 0x87:
#if BX_CPU < 3
# error "Int15 function 87h not supported on < 80386"