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IOCTL: Add int21/4408 is drive removable #228

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Merged
PerditionC merged 1 commit into from
Nov 13, 2025
Merged

IOCTL: Add int21/4408 is drive removable #228

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14 changes: 12 additions & 2 deletions kernel/ioctl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -184,14 +184,24 @@ int DosDevIOctl(lregs * r)
}
else
{
if (r->AL != 9)
if (r->AL != 8 && r->AL != 9)
return DE_INVLDDRV;
dev = NULL;
attr = ATTR_REMOTE;
}

switch (r->AL)
{
case 0x08:
{
struct cds FAR *cdsp = get_cds1(r->BL & 0x1f);
if (cdsp == NULL)
return DE_INVLDDRV;
if (cdsp->cdsFlags & CDSNETWDRV)
return DE_INVLDFUNC;
r->AX = (dpbp->dpb_flags == M_DONT_KNOW);
return SUCCESS;
}
case 0x09:
{
/* note from get_dpb() */
Expand All @@ -213,7 +223,7 @@ int DosDevIOctl(lregs * r)
return SUCCESS;
}
/* fall through */
default: /* 0x04, 0x05, 0x08, 0x0e, 0x0f, 0x11 */
default: /* 0x04, 0x05, 0x0e, 0x0f, 0x11 */
break;
}
break;
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