siem.appelman's articles:

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Bad Rom's in PET 2001 8 81 (1/19/2009 11:05:24 PM) comp.sys.cbm I have a PET 2001 with one or more bad 6540 Rom's. It starts with the ML monitor but is working fine with the Ram/Rom expansion of Nicolas Welte. I was wondering if it is possible to build a small adapter board... Sam

Schematic video circuit PET 64 / Educator 2 166 (8/20/2008 11:37:20 PM) comp.sys.cbm Has anyone the schematics of the video circuit in a PET 64 or Educator (a Commodore 64 in a PET case) ? Or how to separate the H-sync, V-sync and video out of a C64 to connect a CBM 8032 monitor. ... Sam