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winedos: Compute CMOS image checksum automatically.

This commit is contained in:
Christian Costa 2008-12-30 12:19:52 +01:00 committed by Alexandre Julliard
parent 3ae00dafe3
commit dd0faf7dd0
1 changed files with 17 additions and 10 deletions
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25
dlls/winedos/ioports.c
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@ -67,9 +67,8 @@ static BYTE parport_8255[4] = {0x4f, 0x20, 0xff, 0xff};
static BYTE cmosaddress;
/* if you change anything here, use IO_FixCMOSCheckSum below to compute
* the checksum and put the right values in.
*/
static int cmos_image_initialized = 0;
static BYTE cmosimage[64] =
{
0x27, /* 0x00: seconds */
@ -118,8 +117,8 @@ static BYTE cmosimage[64] =
0x00, /* 0x2b: options 2 */
0x00, /* 0x2c: options 3 */
0x3f, /* 0x2d: reserved */
0x03, /* 0x2e: low CMOS ram checksum */
0x19, /* 0x2f: high CMOS ram checksum */
0xcc, /* 0x2e: low CMOS ram checksum (computed automatically) */
0xcc, /* 0x2f: high CMOS ram checksum (computed automatically) */
0x00, /* 0x30: low extended memory byte */
0x1c, /* 0x31: high extended memory byte */
0x19, /* 0x32: century byte */
@ -138,7 +137,6 @@ static BYTE cmosimage[64] =
0x5f /* 0x3f: reserved */
};
#if 0
static void IO_FixCMOSCheckSum(void)
{
WORD sum = 0;
@ -148,9 +146,8 @@ static void IO_FixCMOSCheckSum(void)
sum += cmosimage[i];
cmosimage[0x2e] = sum >> 8; /* yes, this IS hi byte !! */
cmosimage[0x2f] = sum & 0xff;
MESSAGE("calculated hi %02x, lo %02x\n", cmosimage[0x2e], cmosimage[0x2f]);
TRACE("calculated hi %02x, lo %02x\n", cmosimage[0x2e], cmosimage[0x2f]);
}
#endif
#ifdef DIRECT_IO_ACCESS
@ -459,6 +456,11 @@ DWORD WINAPI DOSVM_inport( int port, int size )
res = (DWORD)cmosaddress;
break;
case 0x71:
if (!cmos_image_initialized)
{
IO_FixCMOSCheckSum();
cmos_image_initialized = 1;
}
res = (DWORD)cmosimage[cmosaddress & 0x3f];
break;
case 0x200:
@ -506,7 +508,7 @@ DWORD WINAPI DOSVM_inport( int port, int size )
case 0x3dd:
case 0x3de:
case 0x3df:
if(size > 1)
if (size > 1)
FIXME("Trying to read more than one byte from VGA!\n");
res = (DWORD)VGA_ioport_in( port );
break;
@ -677,6 +679,11 @@ void WINAPI DOSVM_outport( int port, int size, DWORD value )
cmosaddress = (BYTE)value & 0x7f;
break;
case 0x71:
if (!cmos_image_initialized)
{
IO_FixCMOSCheckSum();
cmos_image_initialized = 1;
}
cmosimage[cmosaddress & 0x3f] = (BYTE)value;
break;
case 0x226: