/pub/cbm/schematics/cartridges/pet/

Commodore PET add-ons

Files

ada1800.gif 1999-07-22 35550
Reverse engineered schematic diagram of the ADA 1800 PET printer interface.
The interface is connected to the IEEE-488 port, and some discrete logic
converts the signals to Centronics.
Drawn by Jerzy Sobola, July 22, 1999. Downloaded from
http://www.republika.pl/jsobola/schematy.htm.

modempet.gif 1999-01-01 49691
Reverse engineered schematic diagram of a 300 baud modem for the PET
user port, Mark VII Auto 232. Drawn by Jerzy Sobola, February 11, 1999.
Downloaded from http://www.republika.pl/jsobola/schematy.htm.

petsound.gif 1999-01-01 19451
Reverse engineered schematic diagram of a PET sound interface KL-4M
that connects to the user port and to the cassette port. It seems to
have a 8-bit D/A converter and a speaker. Drawn by Jerzy Sobola,
January 1, 1999. Downloaded from
http://www.republika.pl/jsobola/schematy.htm.

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