I had a similar problem on an IPX, but with an aurora multiport  serial 
card running Solaris.
I do beleive it has something to do with the memory and address space.
Is your memory real sun memory ie.. 33bit parity??

My problem is that I used mixed 33 bit sun with 36 bit IBM which works, 
but have to be in the right slots!!
The sun memory must be in the Primary., ie 1st slots and the 36 bit 
memory in the secondary slots.

I'm not sure what the exact order. I think Obsolyte.com has a PDF of the 
Users manual for the IPX which will give you the proper order.
If not a google search should turn it up.

After the correct ordering the error message went away and I was able to 
autoboot.

I'm still using my IPX w/wietek PU chip as a gatewaty/router for my home 
lan It works good except it has to run Solaris.

Hopefully soon we'll have an aurora driver :)

Cheers

TP

Jock W. Shirey wrote:
> Hello,
> 
> 	I am putting together an small system for a firewall based on an
> IPX.  Since it's going to be a firewall, I purchased a Fast SCSI/Ethernet
> (FSBE/S) (P/N:  501-2015)  card from a friend of mine for the 2nd NIC.
> When I insert the card, I receive a "Invalid FCode start byte at
> ffe70000", and the machine fails to recognize the card.  The strange thing
> is that if I perform a soft reset, the card is recognized without a
> problem.  My friend had the card in a SS5 and never experienced any
> problems.  My IPX has OpenBoot Prom rev. 2.6.  I've done quite a bit of
> extensive searching, and have been unable to find any insight into why
> this is happening.  Any help is very much appreciated.
> 
> Thanks!
> Jock
> 
> 
>