Re: Help! AMCC S5933Q Compatibility Issue

[Ken Crocker <kcrocker@kcconsulting.com>]

Earlier I wrote:

> I am baffled by a problem that, hopefully, someone in this sig
> has dealt with regarding the AMCC S5933QB Matchmaker PCI I/F chip.
> I have designed a board using the chip and it works great -- as
> long as I don’t want to run anything but the DOS based test program
> that interacts with it. For example, during boot, the network
> protocol stack for my ISA 3Com ethernet board gets loaded, but it
> doesn’t detect any devices attached to the network. And, when I
> try to run Win 3.1, most of the time (see below) the computer
> locks up with the display going to power down mode (ie. the H
> and V syncs go away). 

As an update to this, I discovered that my placing 0xFF ("unknown" or
"no connection") in the interrupt line register and 0x01 (may use PCI
INTA#) in the interrupt pin register will cause a conflict with the 3Com
NIC. Setting the interrupt line register to 0x00 (board uses no
interrupts) temporarily solves the problem. I say temporary, because I
still need to figure out how to get a non-conflicting interrupt assigned
to the board. I also still have the Win 3.1 lockup problem, so I'm far
from being out of the woods.

If anybody has any ideas, I would be most grateful for assistance. Even
if you could just point me in the direction of a pertinent FAQ, document
or book title. All the literature I have is in regard to designing PCI
cards, not making them work in a DOS/Windows 3.1/Windows NT 4.0
environment.

Many Thanks In Advance,

Ken Crocker, Principal Engineer
Ken Crocker Consulting
e-mail: kcrocker@kcconsulting.com
(619) 457-0340 Voice, Voicemail, Fax (autoswitch)
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