613 lines
19 KiB
C
613 lines
19 KiB
C
/**************************************************************************\
|
|
|
|
$Header: $
|
|
|
|
$Log: $
|
|
|
|
\**************************************************************************/
|
|
|
|
#include "switches.h"
|
|
|
|
#if ((!defined (WINDOWS_NT)) || (USE_DDC_CODE))
|
|
|
|
#ifndef WINDOWS_NT
|
|
#include <dos.h>
|
|
#endif
|
|
|
|
#include "bind.h"
|
|
#include "defbind.h"
|
|
#include "edid.h"
|
|
|
|
#ifdef WINDOWS_NT
|
|
BOOLEAN bGetIdentifier(dword dwIdentifier, byte* romAddr, long* StartIndex);
|
|
|
|
#if defined(ALLOC_PRAGMA)
|
|
#pragma alloc_text(PAGE,ReportDDCcapabilities)
|
|
#pragma alloc_text(PAGE,ReadEdid)
|
|
#pragma alloc_text(PAGE,InDDCTable)
|
|
#pragma alloc_text(PAGE,bGetIdentifier)
|
|
#endif
|
|
|
|
#define PCI_BIOS_BASE 0x000e0000
|
|
#define PCI_BIOS_LENGTH 0x00020000
|
|
|
|
extern PUCHAR setmgaselNoV(dword MgaSel, dword phyadr, dword limit);
|
|
extern PVOID pMgaDeviceExtension;
|
|
|
|
// I'm having trouble compiling...
|
|
dword CLMFarCall[2];
|
|
dword CLMCallAddress;
|
|
|
|
#endif /* #ifdef WINDOWS_NT */
|
|
|
|
#ifdef _WINDOWS_DLL16
|
|
#include "windows.h"
|
|
#endif
|
|
|
|
#define DEBUG 0
|
|
#define COMPAQ 0
|
|
#define BIOSCOMPAQ 0xFF000
|
|
|
|
byte SupportDDC = FALSE;
|
|
EDID DataEdid;
|
|
|
|
byte whichBios;
|
|
byte BiosEntry[6];
|
|
byte DataEdidFarPtr[6];
|
|
dword physicalAddr;
|
|
dword lenghtService;
|
|
dword OffsetEntryPoint;
|
|
|
|
VesaSet VesaParam[15] = {
|
|
/*00*/{ 640, 480, 75, 0, 31500, 640, 16, 64, 120, 0, 480, 1, 3, 16, 0, 0, 0, 0, 0 ,
|
|
31500, 640, 16, 64, 120, 0, 480, 1, 3, 16, 0, 0, 0, 0, 0 ,
|
|
31500, 640, 16, 64, 120, 0, 480, 1, 3, 16, 0, 0, 0, 0, 0},
|
|
/*01*/{ 640, 480, 72, 0, 31500, 640, 24, 40, 128, 0, 480, 9, 3, 28, 0, 0, 0, 0, 0 ,
|
|
31500, 640, 24, 40, 128, 0, 480, 9, 3, 28, 0, 0, 0, 0, 0 ,
|
|
31500, 640, 24, 40, 128, 0, 480, 9, 3, 28, 0, 0, 0, 0, 0},
|
|
/*02*/{ 640, 480, 60, 0, 25175, 640, 16, 96, 48, 0, 480, 11, 2, 32, 0, 0, 0, 0, 0 ,
|
|
25175, 640, 16, 96, 48, 0, 480, 11, 2, 32, 0, 0, 0, 0, 0 ,
|
|
25175, 640, 16, 96, 48, 0, 480, 11, 2, 32, 0, 0, 0, 0, 0},
|
|
/*03*/{ 800, 600, 75, 0, 49500, 800, 16, 80, 160, 1, 600, 1, 3, 21, 0, 0, 0, 1, 1 ,
|
|
49500, 800, 32, 64, 160, 1, 600, 1, 3, 21, 0, 0, 0, 1, 1 ,
|
|
49500, 800, 32, 64, 160, 1, 600, 1, 3, 21, 0, 0, 0, 1, 1},
|
|
/*04*/{ 800, 600, 72, 0, 50000, 800, 56, 120, 64, 0, 600, 37, 6, 23, 0, 0, 0, 1, 1 ,
|
|
50000, 800, 56, 120, 64, 0, 600, 37, 6, 23, 0, 0, 0, 1, 1 ,
|
|
50000, 800, 56, 120, 64, 0, 600, 37, 6, 23, 0, 0, 0, 1, 1},
|
|
/*05*/{ 800, 600, 60, 0, 40000, 800, 40, 128, 88, 0, 600, 1, 4, 23, 0, 0, 0, 1, 1 ,
|
|
40000, 800, 40, 128, 88, 0, 600, 1, 4, 23, 0, 0, 0, 1, 1 ,
|
|
40000, 800, 32, 128, 88, 0, 600, 1, 4, 23, 0, 0, 0, 1, 1},
|
|
/*06*/{ 800, 600, 56, 0, 37800, 800, 32, 128, 128, 0, 600, 2, 4, 14, 0, 0, 0, 1, 1 ,
|
|
37800, 800, 32, 128, 128, 0, 600, 2, 4, 14, 0, 0, 0, 1, 1 ,
|
|
37800, 800, 32, 128, 128, 0, 600, 2, 4, 14, 0, 0, 0, 1, 1},
|
|
/*07*/{ 1024, 768, 75, 0, 78750, 1024, 16, 96, 176, 1, 768, 1, 3, 28, 0, 0, 0, 1, 1 ,
|
|
78750, 1024, 16, 96, 176, 1, 768, 1, 3, 28, 0, 0, 0, 1, 1 ,
|
|
78750, 1024, 16, 96, 176, 1, 768, 1, 3, 28, 0, 0, 0, 1, 1},
|
|
/*08*/{ 1024, 768, 70, 0, 75000, 1024, 24, 136, 144, 0, 768, 3, 6, 29, 0, 0, 0, 0, 0 ,
|
|
75000, 1024, 32, 128, 144, 0, 768, 3, 6, 29, 0, 0, 0, 0, 0 ,
|
|
75000, 1024, 40, 128, 160, 0, 768, 3, 6, 29, 0, 0, 0, 0, 0},
|
|
/*09*/{ 1024, 768, 60, 0, 65000, 1024, 24, 136, 160, 0, 768, 3, 6, 29, 0, 0, 0, 0, 0 ,
|
|
65000, 1024, 24, 136, 160, 0, 768, 3, 6, 29, 0, 0, 0, 0, 0 ,
|
|
65000, 1024, 32, 136, 160, 0, 768, 3, 6, 29, 0, 0, 0, 0, 0},
|
|
/*10*/{ 1024, 768, 87, 0, 44900, 1024, 32, 128, 64, 0, 384, 1, 4, 21, 0, 0, 1, 1, 1 ,
|
|
44900, 1024, 32, 128, 64, 0, 384, 1, 4, 21, 0, 0, 1, 1, 1 ,
|
|
44900, 1024, 32, 128, 64, 0, 384, 1, 4, 21, 0, 0, 1, 1, 1},
|
|
/*11*/{ 1280, 1024, 75, 0, 135600, 1280, 16, 144, 248, 1, 1024, 2, 3, 37, 0, 0, 0, 1, 1 ,
|
|
135600, 1280, 32, 128, 256, 1, 1024, 2, 3, 37, 0, 0, 0, 1, 1 ,
|
|
135600, 1280, 32, 128, 256, 1, 1024, 2, 3, 37, 0, 0, 0, 1, 1},
|
|
{(word)-1}
|
|
};
|
|
|
|
|
|
#ifdef OS2
|
|
extern int pDdcInfoLen;
|
|
#endif//!OS2
|
|
|
|
byte ReportDDCcapabilities(void)
|
|
{
|
|
|
|
#ifdef OS2
|
|
if(pDdcInfoLen)
|
|
return (TRUE);
|
|
else
|
|
return (FALSE);
|
|
#else//!OS2
|
|
|
|
#if (USE_DDC_CODE)
|
|
PUCHAR romAddr = 0;
|
|
PUCHAR BiosAddr;
|
|
long StartIndex;
|
|
SHORT wNumPages;
|
|
#else
|
|
volatile byte _Far* BiosAddr;
|
|
union _REGS r;
|
|
#endif
|
|
|
|
word i,j;
|
|
byte SupportFunction,DisplayCapabilities;
|
|
dword sel;
|
|
char *BiosId[] = { {"COMPAQ"}, {"OTHERS"} };
|
|
|
|
whichBios = 0;
|
|
SupportFunction = 0;
|
|
|
|
#if (USE_DDC_CODE)
|
|
// getmgasel() always returns 0 on WinNT, and it does not matter.
|
|
sel = getmgasel();
|
|
#else
|
|
if ((sel = getmgasel()) != 0)
|
|
#endif
|
|
{
|
|
/* search for a particular BIOS */
|
|
#if (USE_DDC_CODE)
|
|
if ((BiosAddr = setmgaselNoV(sel, BIOSCOMPAQ, 1)) != NULL)
|
|
#else
|
|
if ((BiosAddr = setmgasel(sel, BIOSCOMPAQ, 1)) != NULL)
|
|
#endif
|
|
{
|
|
for(i = 0x0FEA, j = 0; i < 0x0FF0 ; i++, j++)
|
|
{
|
|
if (*(BiosAddr + i) != BiosId[0][j])
|
|
{
|
|
whichBios = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if (USE_DDC_CODE)
|
|
VideoPortFreeDeviceBase(pMgaDeviceExtension, BiosAddr);
|
|
#endif
|
|
|
|
/* Verify the DDC capabilities */
|
|
switch (whichBios)
|
|
{
|
|
case COMPAQ:
|
|
{
|
|
|
|
#if (USE_DDC_CODE)
|
|
sel = getmgasel();
|
|
if ((romAddr = setmgaselNoV(sel, PCI_BIOS_BASE, 0x20)) == NULL)
|
|
{
|
|
return(FALSE);
|
|
}
|
|
|
|
StartIndex = 0;
|
|
if (!bGetIdentifier('MLC$', romAddr, &StartIndex))
|
|
{
|
|
// We didn't find anything!
|
|
VideoPortFreeDeviceBase(pMgaDeviceExtension, romAddr);
|
|
return(FALSE);
|
|
}
|
|
else
|
|
{
|
|
wNumPages = (SHORT)(lenghtService / (4*1024));
|
|
wNumPages = (wNumPages != 0) ? wNumPages : 1;
|
|
CLMCallAddress = (dword)setmgaselNoV(sel, physicalAddr,
|
|
wNumPages);
|
|
if (CLMCallAddress == (dword)NULL)
|
|
{
|
|
DisplayCapabilities = FALSE;
|
|
}
|
|
else
|
|
{
|
|
CLMFarCall[0] = CLMCallAddress + OffsetEntryPoint;
|
|
// We know this is for Compaq.
|
|
_asm
|
|
{
|
|
xor ebx,ebx
|
|
lea eax, CLMFarCall
|
|
mov bx, cs
|
|
mov [eax+4], ebx
|
|
mov eax, 0xe813
|
|
mov bx, 0x0100
|
|
call fword ptr CLMFarCall
|
|
jc NoCaps
|
|
test ah, ah
|
|
jnz NoCaps
|
|
and bl, bh
|
|
test bl, 0x02
|
|
jz NoCaps
|
|
mov DisplayCapabilities, TRUE
|
|
jmp AllSet
|
|
|
|
NoCaps:
|
|
mov DisplayCapabilities, FALSE
|
|
|
|
AllSet:
|
|
}
|
|
VideoPortFreeDeviceBase(pMgaDeviceExtension,
|
|
(PUCHAR)CLMCallAddress);
|
|
}
|
|
VideoPortFreeDeviceBase(pMgaDeviceExtension, romAddr);
|
|
}
|
|
#else /* #if (USE_DDC_CODE) */
|
|
|
|
#ifdef __WATCOMC__
|
|
r.w.ax = 0xe813;
|
|
#else
|
|
r.x.ax = 0xe813;
|
|
#endif
|
|
r.h.bh = 0x01;
|
|
r.h.bl = 0x00;
|
|
|
|
_int86(0x15, &r, &r);
|
|
|
|
/*** INT 15h function supported ***/
|
|
#ifdef __WATCOMC__
|
|
if (!r.w.cflag && !r.h.ah)
|
|
#else
|
|
if (!r.x.cflag && !r.h.ah)
|
|
#endif
|
|
SupportFunction = TRUE;
|
|
else
|
|
SupportFunction = FALSE;
|
|
|
|
/*** System and monitor support DDC2 ***/
|
|
if((r.h.bh & 0x02) && (r.h.bl & 0x02) && SupportFunction)
|
|
DisplayCapabilities = TRUE;
|
|
else
|
|
DisplayCapabilities = FALSE;
|
|
|
|
#endif /* #if (USE_DDC_CODE) */
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
DisplayCapabilities = FALSE;
|
|
break;
|
|
}
|
|
} /* end case */
|
|
} /* end if */
|
|
|
|
#if DEBUG
|
|
printf ("\n SupportFunction = %d",SupportFunction);
|
|
printf ("\n whichBios = %d",whichBios);
|
|
getch();
|
|
#endif
|
|
|
|
return (DisplayCapabilities);
|
|
#endif//!OS2 & else
|
|
}
|
|
|
|
#ifdef _WINDOWS_DLL16
|
|
|
|
byte ReadEdid(void)
|
|
{
|
|
union REGS r;
|
|
struct SREGS s = {0};
|
|
RealIntStruct regReel = {0};
|
|
dword lineaireDosMem;
|
|
word i, sel, seg;
|
|
byte _far *ddcData;
|
|
EDID *DataEdidPtr;
|
|
|
|
/* Allocate a dos memory bloc of 128 bytes */
|
|
lineaireDosMem = GlobalDosAlloc(128);
|
|
if (!lineaireDosMem)
|
|
return 0;
|
|
|
|
seg = lineaireDosMem >> 16;
|
|
sel = lineaireDosMem & 0xffff;
|
|
|
|
regReel.eax = 0xe813;
|
|
regReel.ebx = 00;
|
|
regReel.ds = seg;
|
|
regReel.esi = 0;
|
|
regReel.sp = 0;
|
|
regReel.ss = 0;
|
|
|
|
r.x.ax = 0x300;
|
|
r.x.bx = 0x115;
|
|
r.x.cx = 0x00;
|
|
r.x.di = OFFSETOF(®Reel);
|
|
s.es = SELECTOROF(®Reel);
|
|
int86x(0x31, &r, &r, &s);
|
|
|
|
if ( !r.x.cflag )
|
|
{
|
|
DataEdidPtr = &DataEdid;
|
|
ddcData = (byte _far *)MAKELP(sel, 0);
|
|
for (i = 0; i < 128; i++)
|
|
*(((byte *) DataEdidPtr) + i) = ddcData[i];
|
|
|
|
if( DataEdid.established_timings.est_timings_I & 0x20 )
|
|
VesaParam[2].Support = TRUE; /* 640X480X60Hz */
|
|
if( DataEdid.established_timings.est_timings_I & 0x08 )
|
|
VesaParam[1].Support = TRUE; /* 640X480X72Hz */
|
|
if( DataEdid.established_timings.est_timings_I & 0x04 )
|
|
VesaParam[0].Support = TRUE; /* 640X480X75Hz */
|
|
if( DataEdid.established_timings.est_timings_I & 0x02 )
|
|
VesaParam[6].Support = TRUE; /* 800X600X56Hz */
|
|
if( DataEdid.established_timings.est_timings_I & 0x01 )
|
|
VesaParam[5].Support = TRUE; /* 800X600X60Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x80 )
|
|
VesaParam[4].Support = TRUE; /* 800X600X72Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x40 )
|
|
VesaParam[3].Support = TRUE; /* 800X600X75Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x10 )
|
|
VesaParam[10].Support = TRUE;/* 1024X768X87Hz I */
|
|
if( DataEdid.established_timings.est_timings_II & 0x08 )
|
|
VesaParam[9].Support = TRUE; /* 1024X768X60Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x04 )
|
|
VesaParam[8].Support = TRUE;/* 1024X768X70Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x02 )
|
|
VesaParam[7].Support = TRUE; /* 1024X768X75Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x01 )
|
|
VesaParam[11].Support = TRUE;/* 1280X1024X75Hz */
|
|
}
|
|
|
|
GlobalDosFree( sel );
|
|
|
|
if (!r.x.cflag)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
#else /* #ifdef _WINDOWS_DLL16 */
|
|
|
|
byte ReadEdid(void)
|
|
{
|
|
#ifndef OS2 //[nPhung] 13-Dec-1994
|
|
|
|
#ifndef WINDOWS_NT
|
|
dword bios32add;
|
|
volatile byte _far *romAddr = 0;
|
|
int i,j,sum;
|
|
#endif
|
|
|
|
dword sel;
|
|
|
|
/* Search for Bios32 Service Directory */
|
|
byte find = 0;
|
|
|
|
#if (USE_DDC_CODE)
|
|
long StartIndex;
|
|
SHORT wNumPages;
|
|
PUCHAR romAddr = 0;
|
|
|
|
StartIndex = 0;
|
|
|
|
sel = getmgasel();
|
|
if ((romAddr = setmgaselNoV(sel, PCI_BIOS_BASE, 0x20)) == NULL)
|
|
return(FALSE);
|
|
|
|
do
|
|
{
|
|
if (!bGetIdentifier('MLC$', romAddr, &StartIndex))
|
|
{
|
|
// We went through the whole region.
|
|
VideoPortFreeDeviceBase(pMgaDeviceExtension, romAddr);
|
|
return(FALSE);
|
|
}
|
|
else
|
|
{
|
|
wNumPages = (SHORT)(lenghtService / (4*1024));
|
|
wNumPages = (wNumPages != 0) ? wNumPages : 1;
|
|
CLMCallAddress = (dword)setmgaselNoV(sel, physicalAddr, wNumPages);
|
|
if (CLMCallAddress != (dword)NULL)
|
|
{
|
|
CLMFarCall[0] = CLMCallAddress + OffsetEntryPoint;
|
|
|
|
_asm
|
|
{
|
|
xor ebx, ebx
|
|
lea eax, CLMFarCall
|
|
mov bx, cs
|
|
mov [eax+4], ebx
|
|
mov ax, 0xe813;
|
|
mov bx, 0
|
|
lea esi, DataEdid
|
|
call fword ptr CLMFarCall
|
|
mov find, al
|
|
}
|
|
VideoPortFreeDeviceBase(pMgaDeviceExtension,
|
|
(PUCHAR)CLMCallAddress);
|
|
}
|
|
}
|
|
} while (find == 0);
|
|
|
|
VideoPortFreeDeviceBase(pMgaDeviceExtension, romAddr);
|
|
|
|
#else /* #if (USE_DDC_CODE) */
|
|
|
|
if ((sel = getmgasel()) != 0)
|
|
{
|
|
romAddr = setmgasel(sel,0xe0000,0x20);
|
|
for (i = 0; (i < 0x20000) && !find; i += 2 )
|
|
{
|
|
if ( (romAddr[i+0] == '_') &&
|
|
(romAddr[i+1] == '3') &&
|
|
(romAddr[i+2] == '2') &&
|
|
(romAddr[i+3] == '_')
|
|
)
|
|
{
|
|
sum = 0;
|
|
for (j = 0; j < 16; j++)
|
|
sum += romAddr[i+j];
|
|
|
|
if (sum & 0xff)
|
|
{
|
|
find = 0;
|
|
continue;
|
|
}
|
|
|
|
bios32add = (dword)romAddr[i+7] << 24;
|
|
bios32add |= (dword)romAddr[i+6] << 16;
|
|
bios32add |= (dword)romAddr[i+5] << 8;
|
|
bios32add |= (dword)romAddr[i+4];
|
|
|
|
if (!GetDDCIdentifier(bios32add))
|
|
{
|
|
switch (whichBios)
|
|
{
|
|
case COMPAQ:
|
|
{
|
|
find = GetCPQDDCDataEdid();
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
find = 0;
|
|
break;
|
|
}
|
|
} /* end switch */
|
|
|
|
}
|
|
|
|
}
|
|
}/* end for */
|
|
}
|
|
|
|
#endif /* #if (USE_DDC_CODE) */
|
|
|
|
if (find)
|
|
|
|
#else //this is OS2 //[nPhung] 13-Dec-1994
|
|
|
|
if(pDdcInfoLen) //[nPhung] 13-Dec-1994
|
|
|
|
#endif // !OS2 and else //[nPhung] 13-Dec-1994
|
|
{
|
|
if( DataEdid.established_timings.est_timings_I & 0x20 )
|
|
VesaParam[2].Support = TRUE; /* 640X480X60Hz */
|
|
if( DataEdid.established_timings.est_timings_I & 0x08 )
|
|
VesaParam[1].Support = TRUE; /* 640X480X72Hz */
|
|
if( DataEdid.established_timings.est_timings_I & 0x04 )
|
|
VesaParam[0].Support = TRUE; /* 640X480X75Hz */
|
|
if( DataEdid.established_timings.est_timings_I & 0x02 )
|
|
VesaParam[6].Support = TRUE; /* 800X600X56Hz */
|
|
if( DataEdid.established_timings.est_timings_I & 0x01 )
|
|
VesaParam[5].Support = TRUE; /* 800X600X60Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x80 )
|
|
VesaParam[4].Support = TRUE; /* 800X600X72Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x40 )
|
|
VesaParam[3].Support = TRUE; /* 800X600X75Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x10 )
|
|
VesaParam[10].Support = TRUE;/* 1024X768X87Hz I */
|
|
if( DataEdid.established_timings.est_timings_II & 0x08 )
|
|
VesaParam[9].Support = TRUE; /* 1024X768X60Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x04 )
|
|
VesaParam[8].Support = TRUE;/* 1024X768X70Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x02 )
|
|
VesaParam[7].Support = TRUE; /* 1024X768X75Hz */
|
|
if( DataEdid.established_timings.est_timings_II & 0x01 )
|
|
VesaParam[11].Support = TRUE;/* 1280X1024X75Hz */
|
|
|
|
#ifdef OS2
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
|
|
#else //!OS2
|
|
|
|
}
|
|
|
|
#if DEBUG
|
|
printf ("\n find = %d",find);
|
|
getch();
|
|
#endif
|
|
|
|
return (find);
|
|
|
|
#endif //OS2
|
|
}
|
|
|
|
#endif /* #ifdef _WINDOWS_DLL16 */
|
|
|
|
byte InDDCTable(dword DispWidth)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; VesaParam[i].DispWidth != (word) -1; i++)
|
|
{
|
|
if (VesaParam[i].DispWidth == DispWidth)
|
|
{
|
|
for (; VesaParam[i].DispWidth == DispWidth; i++)
|
|
{
|
|
if (VesaParam[i].Support)
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
#if (USE_DDC_CODE)
|
|
|
|
BOOLEAN bGetIdentifier(dword dwIdentifier, UCHAR* romAddr, long* StartIndex)
|
|
{
|
|
dword bios32add, biosFarCall[2];
|
|
long i, j, sum;
|
|
byte RetValue;
|
|
|
|
for (i = *StartIndex; i < PCI_BIOS_LENGTH; i += 2 )
|
|
{
|
|
if ((romAddr[i+0] == '_') &&
|
|
(romAddr[i+1] == '3') &&
|
|
(romAddr[i+2] == '2') &&
|
|
(romAddr[i+3] == '_')
|
|
)
|
|
{
|
|
sum = 0;
|
|
for (j = 0; j < 16; j++)
|
|
sum += romAddr[i+j];
|
|
|
|
if (sum & 0xff)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
bios32add = (dword)romAddr[i+7] << 24;
|
|
bios32add |= (dword)romAddr[i+6] << 16;
|
|
bios32add |= (dword)romAddr[i+5] << 8;
|
|
bios32add |= (dword)romAddr[i+4];
|
|
|
|
bios32add = (dword)setmgaselNoV( 0, bios32add, 2);
|
|
if (bios32add == (dword)NULL)
|
|
{
|
|
RetValue = 0x80;
|
|
}
|
|
else
|
|
{
|
|
biosFarCall[0] = bios32add;
|
|
|
|
// We can call bios32add directly, no need to fudge around with
|
|
// selectors and access rights.
|
|
|
|
_asm
|
|
{
|
|
// Load the registers.
|
|
xor ebx,ebx
|
|
lea eax, biosFarCall
|
|
mov bx, cs
|
|
mov [eax+4], ebx
|
|
mov eax, dwIdentifier
|
|
mov ebx, 0
|
|
call fword ptr biosFarCall
|
|
mov physicalAddr, ebx
|
|
mov lenghtService, ecx
|
|
mov OffsetEntryPoint, edx
|
|
mov RetValue, al // 0x00, 0x80, or 0x81
|
|
}
|
|
VideoPortFreeDeviceBase(pMgaDeviceExtension, (PUCHAR)bios32add);
|
|
}
|
|
if (!RetValue)
|
|
{
|
|
*StartIndex = i;
|
|
return(TRUE);
|
|
}
|
|
} // if ((romAddr[i+0] == '_') && ...
|
|
} // for (i = 0; i < PCI_BIOS_LENGTH; i += 2 )
|
|
*StartIndex = PCI_BIOS_LENGTH;
|
|
return(FALSE);
|
|
}
|
|
|
|
#endif /* #if (USE_DDC_CODE) */
|
|
|
|
#endif /* #if ((!defined (WINDOWS_NT)) || (USE_DDC_CODE)) */
|