Re: Apple IIGS ZipChip

[dmds@msg.ti.com (David de Sosa)]

>I have a IIGS with a stock zip chip that, until recently,
>would pass the GS self test, but now fails with 
>SYSTEM BAD 05012A00
>
>if I put in the stock 65c816 all is good
>the switch 4 setting on bank 1 of the Zip  has no effect on this
>
>
>Could someone maybe tell me what the error code means, so I can begin to
>troubleshoot, or do I just try to find another ZipChipGS?

Your message implies that Zip Technologies made a GS version of their Zip 
chip.  As far as I know, they did not.  So I assume you are really talking 
about plug in board that replaces the 65c816 chip that originally came with 
the computer.

David