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adding support for upper memory

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2262
This commit is contained in:
Sebastian Strohhäcker 2005-08-08 13:33:46 +00:00
parent bc49a1ce91
commit caff0f7a8b
9 changed files with 304 additions and 48 deletions
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13
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 1.84 2005-04-29 13:32:31 qbix79 Exp $ */
/* $Id: dos.cpp,v 1.85 2005-08-08 13:33:44 c2woody Exp $ */
#include <stdlib.h>
#include <string.h>
@ -716,12 +716,15 @@ static Bitu DOS_21Handler(void) {
DOS_SetMemAllocStrategy(reg_bx);
break;
case 2: /* Get UMB Link Status */
reg_ax=1; // no UMB support
CALLBACK_SCF(true);
reg_al=dos_infoblock.GetUMBChainState()&1;
CALLBACK_SCF(false);
break;
case 3: /* Set UMB Link Status */
reg_ax=1; // failure, no support
CALLBACK_SCF(true);
if (DOS_LinkUMBsToMemChain(reg_bx)) CALLBACK_SCF(false);
else {
reg_ax=1;
CALLBACK_SCF(true);
}
break;
default:
LOG(LOG_DOSMISC,LOG_ERROR)("DOS:58:Not Supported Set//Get memory allocation call %X",reg_al);