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use device attribute fields for ioctl remote check function (Future Shock svga upgrade); thanks to ripa

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3159
This commit is contained in:
Sebastian Strohhäcker 2008-05-22 16:45:57 +00:00
parent 24bb7de36c
commit 7df6298433
1 changed files with 10 additions and 5 deletions
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15
src/dos/dos_ioctl.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: dos_ioctl.cpp,v 1.30 2008-03-19 17:55:58 c2woody Exp $ */
/* $Id: dos_ioctl.cpp,v 1.31 2008-05-22 16:45:57 c2woody Exp $ */
#include <string.h>
#include "dosbox.h"
@ -115,10 +115,15 @@ bool DOS_IOCTL(void) {
}
return true;
case 0x09: /* Check if block device remote */
reg_dx=0;
if (Drives[drive]->isRemote()) reg_dx|=(1 << 12);
//TODO Set bit 9 on drives that don't support direct I/O
reg_al=0;
if (Drives[drive]->isRemote()) {
reg_dx=0x1000; // device is remote
// undocumented bits always clear
} else {
reg_dx=0x0800; // Open/Close supported
// undocumented bits from device attribute word
// TODO Set bit 9 on drives that don't support direct I/O
}
reg_ax=0x300;
return true;
case 0x0D: /* Generic block device request */
{