Sorry,
here is a bit from the file
Bool VIAGetBIOSTable(VIABIOSInfoPtr pBIOSInfo)
{
VIAModeTablePtr pViaModeTable = pBIOSInfo->pModeTable;
unsigned char *pBIOS = NULL, *pRom, *pTable, *pFPanel, *pLCDTable,
*pSuptTable;
unsigned char *pRefreshTableStart;
unsigned char *pRefreshIndexTable;
unsigned char *pRefreshTable;
unsigned char numSuptPanel, numEntry;
unsigned short tableSize;
int romSize;
int i = 0, j, k, m, sum;
DEBUG(xf86DrvMsg(pBIOSInfo->scrnIndex, X_INFO, "VIAGetBIOSTable\n"));
if (!(pBIOS=xcalloc(1, 0x10000))) {
ErrorF("Allocate memory fail !!\n");
return FALSE;
}
if (xf86ReadBIOS(0xC0000, 0, pBIOS, 0x10000) != 0x10000) {
pBIOSInfo->UseBIOS = FALSE;
xfree(pBIOS);
ErrorF("Read VGA BIOS image fail !!\n");
}
else {
if (*((CARD16 *) pBIOS) != 0xAA55) {
pBIOSInfo->UseBIOS = FALSE;
xfree(pBIOS);
ErrorF("VGA BIOS image is wrong!!\n");
}
else {
romSize = *((CARD8 *) (pBIOS + VIA_BIOS_SIZE_POS)) * 512;
pRom = pBIOS;
sum = 0;
for (i = 0; i < romSize; i++) {
sum += *pRom++;
}
if (((CARD8) sum) != 0) {
pBIOSInfo->UseBIOS = FALSE;
xfree(pBIOS);
ErrorF("VGA BIOS image is wrong!! CheckSum = %x\n", sum);
}
}
}
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