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kernel
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add implementation of int 0x2F function 0x1f build CDS from dosemu2/fdpp

This commit is contained in:
Kenneth J Davis 2021-08-08 02:19:14 -04:00
parent c4d6f885f4
commit 15900d7827
1 changed files with 40 additions and 0 deletions
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40
kernel/inthndlr.c
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@ -2104,6 +2104,46 @@ VOID ASMCFUNC int2F_12_handler(struct int2f12regs FAR *pr)
r.AL = (r.CL & 3) ? 28 : 29;
break;
case 0x1f: /* build current directory structure */
{
/* this is similar to ARG1-'A', but case-insensitive.
* Note: the letter is passed here, not number! */
int drv = (r.callerARG1 & 0x1f) - 1;
struct cds FAR *cdsp;
if (drv < 0 || r.callerARG1 < 'A' || r.callerARG1 > 'z')
{
r.FLAGS |= FLG_CARRY;
break;
}
cdsp = get_cds_unvalidated(drv);
if (cdsp == NULL)
{
r.FLAGS |= FLG_CARRY;
break;
}
strcpy(TempCDS.cdsCurrentPath, "?:\\");
*TempCDS.cdsCurrentPath = (BYTE)(r.callerARG1 & 0xff);
TempCDS.cdsBackslashOffset = 2;
if (cdsp->cdsFlags)
{
TempCDS.cdsDpb = cdsp->cdsDpb;
TempCDS.cdsFlags = CDSPHYSDRV; // don't inherit CDS flags
}
else
{
TempCDS.cdsDpb = NULL;
TempCDS.cdsFlags = 0;
}
TempCDS.cdsStrtClst = 0xffff;
TempCDS.cdsParam = 0xffff;
TempCDS.cdsStoreUData = 0xffff;
r.CX = sizeof(TempCDS);
r.ES = FP_SEG(&TempCDS);
r.DI = FP_OFF(&TempCDS);
r.FLAGS &= ~FLG_CARRY;
break;
}
case 0x20: /* get job file table entry */
{
psp FAR *p = MK_FP(cu_psp, 0);