William Levak wrote:
>
> On Thu, 5 Aug 1999, Bo Zimmerman wrote:
>
> >
> > The Commodore SuperPET SP9000 -- Wow, there are not one, but TWO revisions
> > of the SP9000 expansion board. The older is a double expansion board,
Double? I think there are three... (plus that card mentioned later) You
can't see all of of the boards, but my SuperPET picture is of that old version.
http://www.jps.net/foxnhare/superpet.jpg
> In addition, there should be a small daughter board in a card edge
> connector towards the right rear of the top(memory) board. The chips on
> the board should be facing towards the rear of the computer. The Waterloo
> software will not load without this board.
All those boards stack up so high they had to cut a hole in the case (just
under the monitor lip) so that card could fit (at least on my SuperPET - which
is still non functional...) Will have to check that board's orientation.
> The chips in sockets UD11 and UD12 could be anything. Some PET software
> required a ROM in these sockets and the switches are a way of turning them
> on and off. Also, when SuperPETs were shipped from the factory, they had
> ROMs in these sockets. These ROMs had no function that I could find. In
> fact, all the ROMs that I saw were actually obselete ROMs, apparently
> placed in the sockets for test purposes, and simply left there. Look
> carefully at these ROMs. You may have some rare version of an old ROM.
Next time I am at my storage unit I'll try to remmeber to take a look...
--
01000011 01001111 01001101 01001101 01001111 01000100 01001111 01010010 01000101
Larry Anderson - Sysop of Silicon Realms BBS (209) 754-1363 300-2400 baud
Commodore 8-bit page at: http://www.jps.net/foxnhare/commodore.html
01000011 01001111 01001101 01010000 01010101 01010100 01000101 01010010 01010011
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