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allow small .com files to be exectued with not much free memory left;

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int27 always clears the returned error code; fixes corncob3d music


Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3048
This commit is contained in:
Sebastian Strohhäcker 2007-11-18 10:30:12 +00:00
parent 0e6e7bea4c
commit 10b39bc067
3 changed files with 21 additions and 13 deletions
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9
src/dos/dos.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: dos.cpp,v 1.105 2007-11-04 11:11:34 c2woody Exp $ */
/* $Id: dos.cpp,v 1.106 2007-11-18 10:30:12 c2woody Exp $ */
#include <stdlib.h>
#include <string.h>
@ -384,7 +384,7 @@ static Bitu DOS_21Handler(void) {
//TODO First get normal files executing
// Important: This service does not set the carry flag!
DOS_ResizeMemory(dos.psp(),&reg_dx);
DOS_Terminate(true);
DOS_Terminate(true,reg_al);
dos.return_code=reg_al; //Officially a field in the SDA
dos.return_mode=RETURN_TSR;
break;
@ -689,7 +689,7 @@ static Bitu DOS_21Handler(void) {
reg_ax=0x4c00; /* Terminate Program */
case 0x4c: /* EXIT Terminate with return code */
{
if (DOS_Terminate(false)) {
if (DOS_Terminate(false,reg_al)) {
/* This can't ever return false normally */
} else {
reg_ax=dos.errorcode;
@ -1011,7 +1011,6 @@ static Bitu DOS_21Handler(void) {
break;
};
return CBRET_NONE;
/* That's it now let's get it working */
};
@ -1024,7 +1023,7 @@ static Bitu DOS_20Handler(void) {
static Bitu DOS_27Handler(void) {
// Terminate & stay resident
Bit16u para = (reg_dx/16)+((reg_dx % 16)>0);
if (DOS_ResizeMemory(dos.psp(),&para)) DOS_Terminate(true);
if (DOS_ResizeMemory(dos.psp(),&para)) DOS_Terminate(true,0);
return CBRET_NONE;
}