Commodore vic20

Promqueen Cartridge For VIC-20

The Gloucester Computer Bus Co. Inc. Promqueen Cartridge provides EPROM programming, operating, and emulating capability for the Commodore VIC-20 computer. All necessary connections are made when the Promqueen is plugged into the VIC’s expansion port. The internal programming voltage power supply includes current limiting to prevent damage to the cartridge or the computer in the event of operator error or faulty EPROMs. The Promqueen supports 2716, 2732A and 2732 EPROMs.

The Promqueen contains four kilobytes of RAM for testing programs before burning them on EPROM. A MIMIC switch permits an external computer to access programs written into Promqueen RAM. In MIMIC “mode a jumper cable connects between the Promqueen zero insertion force socket and the socket in the external computer for which an EPROM is desired. This feature allows use of a VIC with Promqueen as a development system. A DIP switch determines which of the four VIC expansion blocks is occupied by the Promqueen. This allows the Promqueen RAM to be used to expand the user BASIC memory of the VIC. It also allows the Promqueen to be used in the Commodore Super Expander in conjunction with other cartridges, such as Commodore’s VICMON, without address conflicts.