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Add beta2 patch: remove zero-entries when scanning for available keys in CON

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2754
This commit is contained in:
Sebastian Strohhäcker 2007-01-11 18:08:54 +00:00
parent c9ba894dc9
commit a02b03cd47
1 changed files with 11 additions and 3 deletions
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14
src/dos/dev_con.h
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: dev_con.h,v 1.27 2007-01-08 19:45:39 qbix79 Exp $ */
/* $Id: dev_con.h,v 1.28 2007-01-11 18:08:54 c2woody Exp $ */
#include "dos_inc.h"
#include "../ints/int10.h"
@ -369,8 +369,16 @@ Bit16u device_CON::GetInformation(void) {
Bit16u head=mem_readw(BIOS_KEYBOARD_BUFFER_HEAD);
Bit16u tail=mem_readw(BIOS_KEYBOARD_BUFFER_TAIL);
if ((head==tail) && !readcache) return 0x80D3; /* No Key Available */
return 0x8093; /* Key Available */
if ((head==tail) && !readcache) return 0x80D3; /* No Key Available */
if (real_readw(0x40,head)) return 0x8093; /* Key Available */
/* remove the zero from keyboard buffer */
Bit16u start=mem_readw(BIOS_KEYBOARD_BUFFER_START);
Bit16u end =mem_readw(BIOS_KEYBOARD_BUFFER_END);
head+=2;
if (head>=end) head=start;
mem_writew(BIOS_KEYBOARD_BUFFER_HEAD,head);
return 0x80D3; /* No Key Available */
};
device_CON::device_CON() {