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From: treesh@vangogh.helios.nd.edu
Newsgroups: comp.sys.cbm
Subject: Re: QuickSilver 128
Message-ID: <1991May17.215354.9767@news.nd.edu>
Date: 17 May 91 21:53:54 GMT
Article-I.D.: news.1991May17.215354.9767
References: <59771@aurs01.UUCP> <1991May1.050128.26834@cse.uta.edu> <59780@aurs01.UUCP> <1991May2.075952.21951@cse.uta.edu>
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The QS 128 comes with a ROM chip, but the IEEE FLASH does not (for the 128).
Both products are the same, they both contain a 6522 CIA buss controller, 
some other small chip I think, and a IEEE FLASH ROM for the C64, or C128 in
64 mode.  If you have the QS128 product, it comes with an extra ROM chip
that plugs into your C128 computer.  It does not go into the extra sockette,
but rather replaces the kernal rom that is already in there, so you need to
pull it out and put this new one in.

This new rom allows for the 128 mode to see and use the IEEE buss.  The frist
swtich on the unit has no effect at all in C128 mode, and there really is
no way to "disable" the unit, however I have found that in 128 mode there
really is no reason to at all.  Unlike FLASH mode of 64, the QS128 driver
software sits WAY-UP in rom memory, way out of the way of anything else that
might be going on in the computers memory 
(At least in my expirence)

Switching off the DEVICE 8 and DEVICE 9&10 switches to all serial mode 
acutal just like a device disable for 128 mode.  It so compatable that
I even think you can still use your cassette drive in 128 mode with the
think active in IEEE mode.  (God only knows why anyone would want to?)

The clip has no real pourpose in 128 mode, but it still is a good idea to
install it onto that one pin of the PLA chip.  This is so that 64 mode can
maintain its sort-of-compatablity with the IEEE buss rom (FLASH).

I have found ZERO conflits in 128 mode, but, in 64 mode, the IEEE FLASH
has cause a lot of trouble wiith most ternialal software.

ctfm