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Re: coleco
| Re: coleco [message #10420] |
Wed, 08 August 2012 00:38 |
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Originally posted by: utzoo!decvax!harpo!seismo!hao!hplabs!hp-pcd!orstcs!trethewey j
<pre>Article-I.D.: orstcs.183
Posted: Mon Jan 10 21:14:41 1983
Received: Thu Jan 13 05:11:03 1983
My boss at the OSU Computer Center recently bought a ColecoVision, and
out of curiosity, looked inside. There was a Z-80 in there. Of course,
there are many readily available sources of instruction set documentation.
I/O is performed using ports (PIO, PPI, USART, whatever) or other appropriate
TTL. It may be possible to tell where I/O "goes to/comes from" just by
looking at the board and the chip numbers (buy a TTL handbook). If that
is not possible, you may have to resort to pulling PROM's out of sockets,
reading them elsewhere and disassembling the machine code. I am sure you
will violate any warranty by doing this.
(If I have made any blatant errors, flames to:)
Jim Trethewey, Oregon State University, Corvallis.
</pre>
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Re: coleco
By: Anonymous on Wed, 08 August 2012 00:38
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