/*
this function is called from an assembler wrapper function
*/
VOID int2526_handler(WORD mode, struct int25regs FAR * r)
{
ULONG blkno;
UWORD nblks;
BYTE FAR *buf;
UBYTE drv;
if (mode == 0x26) mode = DSKWRITEINT26;
else mode = DSKREADINT25;
drv = r->ax;
if (drv >= lastdrive)
{
r->ax = 0x201;
r->flags |= FLG_CARRY;
return;
}
nblks = r->cx;
blkno = r->dx;
buf = MK_FP(r->ds, r->bx);
if (nblks == 0xFFFF)
{
/*struct HugeSectorBlock FAR *lb = MK_FP(r->ds, r->bx);*/
blkno = ((struct HugeSectorBlock FAR *)buf)->blkno;
nblks = ((struct HugeSectorBlock FAR *)buf)->nblks;
buf = ((struct HugeSectorBlock FAR *)buf)->buf;
}
InDOS++;
r->ax=dskxfer(drv, blkno, buf, nblks, mode);
if (mode == DSKWRITE)
if (r->ax <= 0)
setinvld(drv);
if (r->ax > 0)
{
r->flags |= FLG_CARRY;
--InDOS;
return;
}
r->ax = 0;
r->flags &= ~FLG_CARRY;
--InDOS;
}
VOID int26_handler(struct int25regs FAR * r)
{
ULONG blkno;
UWORD nblks;
BYTE FAR *buf;
UBYTE drv = r->ax & 0xFF;
InDOS++;
if (r->cx == 0xFFFF)
{
struct HugeSectorBlock FAR *lb = MK_FP(r->ds, r->bx);
blkno = lb->blkno;
nblks = lb->nblks;
buf = lb->buf;
}
else
{
nblks = r->cx;
blkno = r->dx;
buf = MK_FP(r->ds, r->bx);
}
if (drv >= nblkdev)
{
r->ax = 0x202;
r->flags |= FLG_CARRY;
return;
}
if (!dskxfer(drv, blkno, buf, nblks, DSKWRITE))
{
/* XXX: should tell the user exactly what the error was */
r->ax = 0x202;
r->flags |= FLG_CARRY;
return;
}
setinvld(drv);
r->ax = 0;
r->flags &= ~FLG_CARRY;
--InDOS;
}
