Expert PET advice sought

From: MAY Peter (peter.may_at_environment.wa.gov.au)
Date: 2003-11-05 08:06:13

I'm trying to restore an old CBM PET 2001-8 at home. I need expert advice.
I've gone through the clean-up and reseating the chips in their
sockets phase which fixed a bad connection on a BASIC ROM chip.
The screen display looks something like this:

 *** COMMODORE BASIC ***YTES FREE
 SIC ***YTES FREE
                 []cursor
 READY.
 []cursor             READY

 It's got me stumped, I have two cursors flashing!
 Keyboard is inactive, cassette motor runs briefly on start-up.
 I was suspecting a possible memory problem, but hoping it was
 sonmething else. 6550 SRAMs have not been made for a long time!

 Can anyone help with a possible diagnoses?

 Regards
 Peter
Disclaimer:
This e-mail is confidential to the addressee and is the view of the writer, not necessarily that of the Department of Environmental Protection, which accepts no responsibility for the contents.
If you are not the addressee, please notify the Department by return e-mail and delete the message from your system.  You must not disclose or use this information in any way.
No warranty is made that this material is free from computer viruses.


       Message was sent through the cbm-hackers mailing list

Archive generated by hypermail pre-2.1.8.