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Added FAT image access and DOS booter functionality

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1762
This commit is contained in:
Dean Beeler 2004-04-03 19:59:07 +00:00
parent ac367177e7
commit f841081709
1 changed files with 82 additions and 0 deletions
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82
src/hardware/cmos.cpp
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@ -23,6 +23,7 @@
#include "pic.h"
#include "inout.h"
#include "mem.h"
#include "bios.h"
static struct {
Bit8u regs[0x40];
@ -114,6 +115,8 @@ static Bitu cmos_readreg(Bitu port,Bitu iolen) {
LOG(LOG_BIOS,LOG_ERROR)("CMOS:Read from illegal register %x",cmos.reg);
return 0xff;
}
Bitu drive_a, drive_b;
Bit8u hdparm;
time_t curtime;
struct tm *loctime;
@ -168,6 +171,85 @@ static Bitu cmos_readreg(Bitu port,Bitu iolen) {
}
return val;
}
case 0x10: /* Floppy size */
drive_a = 0;
drive_b = 0;
if(imageDiskList[0] != NULL) drive_a = imageDiskList[0]->GetBiosType();
if(imageDiskList[1] != NULL) drive_b = imageDiskList[1]->GetBiosType();
return ((drive_a << 4) | (drive_b));
/* First harddrive info */
case 0x12:
hdparm = 0;
if(imageDiskList[2] != NULL) hdparm |= 0xf;
if(imageDiskList[3] != NULL) hdparm |= 0xf0;
return hdparm;
case 0x19:
if(imageDiskList[2] != NULL) return 47; /* User defined type */
return 0;
case 0x1b:
if(imageDiskList[2] != NULL) return (imageDiskList[2]->cylinders & 0xff);
return 0;
case 0x1c:
if(imageDiskList[2] != NULL) return ((imageDiskList[2]->cylinders & 0xff00)>>8);
return 0;
case 0x1d:
if(imageDiskList[2] != NULL) return (imageDiskList[2]->heads);
return 0;
case 0x1e:
if(imageDiskList[2] != NULL) return 0xff;
return 0;
case 0x1f:
if(imageDiskList[2] != NULL) return 0xff;
return 0;
case 0x20:
if(imageDiskList[2] != NULL) return (0xc0 | (((imageDiskList[2]->heads) > 8) << 3));
return 0;
case 0x21:
if(imageDiskList[2] != NULL) return (imageDiskList[2]->cylinders & 0xff);
return 0;
case 0x22:
if(imageDiskList[2] != NULL) return ((imageDiskList[2]->cylinders & 0xff00)>>8);
return 0;
case 0x23:
if(imageDiskList[2] != NULL) return (imageDiskList[2]->sectors);
return 0;
/* Second harddrive info */
case 0x1a:
if(imageDiskList[3] != NULL) return 47; /* User defined type */
return 0;
case 0x24:
if(imageDiskList[3] != NULL) return (imageDiskList[3]->cylinders & 0xff);
return 0;
case 0x25:
if(imageDiskList[3] != NULL) return ((imageDiskList[3]->cylinders & 0xff00)>>8);
return 0;
case 0x26:
if(imageDiskList[3] != NULL) return (imageDiskList[3]->heads);
return 0;
case 0x27:
if(imageDiskList[3] != NULL) return 0xff;
return 0;
case 0x28:
if(imageDiskList[3] != NULL) return 0xff;
return 0;
case 0x29:
if(imageDiskList[3] != NULL) return (0xc0 | (((imageDiskList[3]->heads) > 8) << 3));
return 0;
case 0x2a:
if(imageDiskList[3] != NULL) return (imageDiskList[3]->cylinders & 0xff);
return 0;
case 0x2b:
if(imageDiskList[3] != NULL) return ((imageDiskList[3]->cylinders & 0xff00)>>8);
return 0;
case 0x2c:
if(imageDiskList[3] != NULL) return (imageDiskList[3]->sectors);
return 0;
case 0x39:
return 0;
case 0x3a:
return 0;
case 0x0b: /* Status register B */
case 0x0f: /* Shutdown status byte */
case 0x17: /* Extended memory in KB Low Byte */