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| author | Michael Brown | 2011-04-28 14:05:40 +0200 |
|---|---|---|
| committer | Michael Brown | 2011-04-28 14:07:32 +0200 |
| commit | 62c963516612103c965f7b4789faf63753ca77a4 (patch) | |
| tree | e824afc555fda3f398dbbec3326f9feb18e999a4 /src/arch/i386/interface/pcbios/int13.c | |
| parent | [build] Accept EMBED=... as a synonym for EMBEDDED_IMAGE=... (diff) | |
| download | ipxe-62c963516612103c965f7b4789faf63753ca77a4.tar.gz ipxe-62c963516612103c965f7b4789faf63753ca77a4.tar.xz ipxe-62c963516612103c965f7b4789faf63753ca77a4.zip | |
[int13] Catch INT 13,4b when no explicit drive number is present
This allows older versions of ELTORITO.SYS (such as the version found
on the FreeDOS installation CD-ROM) to use iPXE's emulated CD-ROM
drive.
Reported-by: Robin Smidsrød <robin@smidsrod.no>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/arch/i386/interface/pcbios/int13.c')
| -rw-r--r-- | src/arch/i386/interface/pcbios/int13.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/arch/i386/interface/pcbios/int13.c b/src/arch/i386/interface/pcbios/int13.c index 93d01088..b099958c 100644 --- a/src/arch/i386/interface/pcbios/int13.c +++ b/src/arch/i386/interface/pcbios/int13.c @@ -1187,12 +1187,17 @@ static __asmcall void int13 ( struct i386_all_regs *ix86 ) { bios_drive, int13->drive ); ix86->regs.dl = int13->drive; return; + } else if ( ( ( bios_drive & 0x7f ) == 0x7f ) && + ( command == INT13_CDROM_STATUS_TERMINATE ) + && int13->is_cdrom ) { + /* Catch non-drive-specific CD-ROM calls */ + } else { + continue; } - continue; } DBGC2 ( int13, "INT13,%02x (%02x): ", - ix86->regs.ah, int13->drive ); + ix86->regs.ah, bios_drive ); switch ( command ) { case INT13_RESET: |