cvs commit: src/sys/net if.c
doconnor at gsoft.com.au
Mon Sep 27 03:13:40 PDT 2004
On Mon, 27 Sep 2004 19:01, Peter Jeremy wrote:
> On Mon, 2004-Sep-27 12:43:29 +0930, Daniel O'Connor wrote:
> >Hmm, MS have a circuit diagram ->
> I bumped into that as well. The innards of the PAL aren't documented
> anywhere that I could see and there seems to be quite a lot of logic
> when the only inputs are the PCI clock and the NMI switch. (Bloated
> design and undocumented internals - sounds familiar :-).
Heh, I'd say it's not that complex.
You have to hold #SERR down for 1 PCI clock and then tri-state it. I think you
can do it with a basic 16V8 or so.
I'm thinking of making such a board at work :)
> >Pin 42 is #SERR and the other side of it in ground.
> Does anyone with knowledge of the PCI spec know if just shorting #SERR
> to ground will work? (Assuming that the BIOS/chipset maps #SERR to NMI).
You're supposed to hold it low for 1 clock and tri-state (according to the
> I've used a screwdriver on an ISA slot on several occasions but haven't
> tried it on a PCI bus yet.
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
-- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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