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add int 2f subfunc 122B and 122D from Eduardo Casino

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git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/branches/UNSTABLE@1163 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Kenneth J Davis 2005-12-10 02:41:43 +00:00
parent ed009bd3eb
commit bb3351bdd0
1 changed files with 29 additions and 0 deletions
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29
kernel/inthndlr.c
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@ -2233,12 +2233,40 @@ VOID ASMCFUNC int2F_12_handler(struct int2f12regs r)
r.FLAGS &= ~FLG_CARRY;
break;
case 0x2b: /* Device I/O Control */
if (r.BP < 0x4400 || r.BP > 0x44ff)
goto error_invalid;
{
lregs lr;
lr.AX = r.BP;
lr.BX = r.BX;
lr.CX = r.CX;
lr.DX = r.DX;
lr.DI = r.DI;
lr.SI = r.SI;
lr.DS = r.DS;
rc = DosDevIOctl(&lr); /* can set critical error code! */
}
if (rc < SUCCESS)
{
r.AX = -rc;
if (rc != DE_DEVICE && rc != DE_ACCESS)
CritErrCode = r.AX;
goto error_carry;
}
break;
case 0x2c: /* added by James Tabor For Zip Drives
Return Null Device Pointer */
/* by UDOS+RBIL: get header of SECOND device driver in device chain,
omitting the NUL device TE */
r.BX = FP_SEG(nul_dev.dh_next);
r.AX = FP_OFF(nul_dev.dh_next);
break;
case 0x2d: /* Get Extended Error Code */
r.AX = CritErrCode;
/* fall through only to re-use break */
case 0x2e: /* GET or SET error table addresse - ignored
called by MS debug with DS != DOSDS, printf
@ -2285,6 +2313,7 @@ error_exit:
r.AX = -rc;
if (CritErrCode == SUCCESS)
CritErrCode = r.AX; /* Maybe set */
error_carry:
r.FLAGS |= FLG_CARRY;
}