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inthndlr: align hma size to para

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Based on a patch https://github.com/dosemu2/fdpp/commit/e7fe81d458
for FDDP by @stsp

[fixes #101]
This commit is contained in:
Andrew Bird 2023-04-13 19:22:09 +01:00 committed by Kenneth J Davis
parent 4973031b00
commit afe7fbe068
1 changed files with 4 additions and 2 deletions
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6
kernel/inthndlr.c
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@ -1925,6 +1925,7 @@ VOID ASMCFUNC int2F_12_handler(struct int2f12regs FAR *pr)
{
COUNT rc;
long lrc;
UDWORD tsize;
#define r (*pr)
@ -1939,8 +1940,9 @@ VOID ASMCFUNC int2F_12_handler(struct int2f12regs FAR *pr)
size = ~offs; /* BX for query HMA */
if (r.AL == 0x02) /* allocate HMA space */
{
if (r.BX < size)
size = r.BX;
tsize = (r.BX + 0xf) & 0xfffffff0; /* align to paragraph */
if (tsize < size)
size = (UWORD)tsize;
AllocateHMASpace(offs, offs+size);
firstAvailableBuf += size;
}