[syslinux] Syslinux Bootsector
martin at weh.rwth-aachen.de
martin at weh.rwth-aachen.de
Wed May 15 04:47:51 PDT 2002
Hi!
Facing a strange problem about not being able to access
the floppy drive after booting from a rescue-floppy with
2.2.x kernel on an asus p4te mainboard, i searched the
net and found a bug in the bootsector of the 2.2.x kernels.
Before control is redirected to the kernel, the floppy drive
is shut down in a way, that freezes the FD-Controller on
recent mainboards (like the ASUS P4T-E).
The Syslinux-Bootsector (at least until version 1.72) uses
the same method of "stopping" the floppy; this makes the
installation with multiple floppies impossible.
I'd like to submit a change of the SysLinux Bootsector that
is based on the newer 2.4.x kernel approaches to that problem
and worked fine for me:
;
; Linux wants the floppy motor shut off before starting the kernel,
; at least bootsect.S seems to imply so
;
kill_motor:
push ax
push dx
xor ax,ax
xor dx,dx
int 13h
pop dx
pop ax
instead of
mov dx,03F2h
xor al,al
call slow_out
Thx for any comments,
Martin Neuhaeusser
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