Christian Costa : winedos: Compute CMOS image checksum automatically.
Alexandre Julliard
julliard at winehq.org
Tue Dec 30 06:57:06 CST 2008
Module: wine
Branch: master
Commit: dd0faf7dd0dbb2da7cf3999fbe604e35b6f299e5
URL: http://source.winehq.org/git/wine.git/?a=commit;h=dd0faf7dd0dbb2da7cf3999fbe604e35b6f299e5
Author: Christian Costa <titan.costa at wanadoo.fr>
Date: Tue Dec 30 12:19:52 2008 +0100
winedos: Compute CMOS image checksum automatically.
---
dlls/winedos/ioports.c | 27 +++++++++++++++++----------
1 files changed, 17 insertions(+), 10 deletions(-)
diff --git a/dlls/winedos/ioports.c b/dlls/winedos/ioports.c
index d03a4cd..6d505e5 100644
--- a/dlls/winedos/ioports.c
+++ b/dlls/winedos/ioports.c
@@ -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:
@@ -506,8 +508,8 @@ DWORD WINAPI DOSVM_inport( int port, int size )
case 0x3dd:
case 0x3de:
case 0x3df:
- if(size > 1)
- FIXME("Trying to read more than one byte from VGA!\n");
+ if (size > 1)
+ FIXME("Trying to read more than one byte from VGA!\n");
res = (DWORD)VGA_ioport_in( port );
break;
case 0x00:
@@ -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:
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