8MHz Zip chip in //e - comments + a question (was Re: RocketChip 10mhz)

[david@wraith.cs.uow.edu.au (David E A Wilson)]

sebugg@CS1.PRESBY.EDU (Stephen Buggie) writes:
>Zip's advertising states that there is a 30-day no-quibble
>money back guarantee, followed by a one year warranty.  BUT, and this is
>a big BUT, when you get the Zip Chip it states that if any of the 40 pins
>on this giant IC break off during installation, the guarantee is VOID!
>This disclaimer is so strange that they ought to have to tell you about
>it before the money is paid!

I bought my Zip 8000 2nd hand so the warranty was over anyway. I had no
trouble installing it and it worked perfectly. About a month later my computer
locked up while running LIFE and reset did nothing. Power cycling it left me
with vertical bars indicating possible problems with the pins so I pulled
it out and put back the 65c02. The problems remained...

I then found my disk ][ controller was asserting reset all the time. Removing
it made the 65c02 work. I looked at the Zip pins and decided that I did not
like the the shape of them (square rather than flat) for plugging into the
motherboard socket so I plugged the Zip Chip into a socket which is then
plugged into the motherboard socket. Now if I ever have to pull it out again
there is no chance of damaging the pins.
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Now a question. I was going to install some custom ROMs in my //e using 27128
rather than 2764 chips and use a bank selection scheme similar to that used
by the //c (I was going to use AN2 rather than CASSOUT to select the bank).
It then occured to me that this would stuff up the caching of the ROMs by the
Zip chip. Was the Zip developed before or after the Unidisk 3.5 ROM upgrade?
Does it know what machine it is in and handle the //c bank switching only
in a //c or would it work in a //e if I used CASSOUT to swap banks?
-- 
David Wilson				+61 42 213802 voice, +61 42 213262 fax
Dept Comp Sci, Uni of Wollongong	david@cs.uow.edu.au