| commit | 8e5db045c60ce25a9eb65a1803d47be4002a3e17 | |
| author | H. Peter Anvin <hpa@zytor.com> | |
| Thu, 3 Jul 2008 22:22:39 +0000 (3 15:22 -0700) | ||
| committer | H. Peter Anvin <hpa@zytor.com> | |
| Thu, 3 Jul 2008 22:22:39 +0000 (3 15:22 -0700) | ||
| tree | 8972e976d9dcf866cbbe2f10950d3699aacdd171 | treesnapshot (tar.gz zip) |
| parent | b941fb60dcf169bea3769466238a63b7eb15d739 | commitdiff |
memdisk: install a DPT if needed in INT 1Eh; better zero-drive detection
Per the Interrupt list, treat INT 13 08 returning with CL=0 as a
failure, meaning single drive only.
If we find ourselves the only floppy drive, install a DPT into INT
1Eh. This appears to be needed for PC-DOS 7.0 to boot. This can be
overridden with the "nodpt" option, and forced with the "dpt" option.
Per the Interrupt list, treat INT 13 08 returning with CL=0 as a
failure, meaning single drive only.
If we find ourselves the only floppy drive, install a DPT into INT
1Eh. This appears to be needed for PC-DOS 7.0 to boot. This can be
overridden with the "nodpt" option, and forced with the "dpt" option.
| memdisk/memdisk.asm | diffblobblamehistory | |
| memdisk/memdisk.h | diffblobblamehistory | |
| memdisk/setup.c | diffblobblamehistory |