PIC question. (fwd)
adam at www.missl.cs.umd.edu
adam at www.missl.cs.umd.edu
Wed Oct 23 09:37:00 CEST 2002
[PS: Can I somehow tell mailman to accept my email from multiple
addresses?]
hello
I'm trying to set "bios classic/dos" like state
on the winfast 6300max/sis630 motherboard.
one of the issues I'm having is that it seems that
interrupt 9 (keyboard) is not beging tiggered.
(this is after linuxbios finish booting and I
start bochs bios).
Initially I have suspected that the PIC in the sis630
is not getting programmed.
However, going over boch's bios sources I found out that it
does DO program PIC..so it is not the issue here.
(relevant code at end of email).
Thus the question is :
What is the extra step I'm missing that has to be run after
linuxbios finish but before attempting to program PIC for
bios/dos style interrupt mapping?
Ideas?
;; PIC
mov al, #0x11 ; send initialisation commands
out 0x20, al
out 0xa0, al
mov al, #0x08
out 0x21, al
mov al, #0x70
out 0xa1, al
mov al, #0x04
out 0x21, al
mov al, #0x02
out 0xa1, al
mov al, #0x01
out 0x21, al
out 0xa1, al
--
Adam
http://www.eax.com The Supreme Headquarters of the 32 bit registers
More information about the coreboot
mailing list