Posted By
gerliczer
on 2016-10-15
14:51:06
|  Re: Suggestion for repairing a Commodore Plus4
You may burn an EPROM with Diag264 software and put it in the Function low ROM socket (U25). You may even try to buy a complete test tools set from the creator of Diag264 or build your own. You may even run oscilloscope and logic analyzer tests based on the official troubleshooting guide or system technical manuals you can find at Bo Zimmerman's site.
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