Reprogrammable cartridge memory with built-in identification cir

Details Reprogrammable cartridge memory with built-in identification cir Reprogrammable cartridge memory with built-in identification cir

1986-05-19

1987-07-14

Williams, A. E.

Boots, shoes, and leggings

365 52, 380 4, G06F 1214

Patent

active

046807314

ABSTRACT:
A reprogrammable plug-in semiconductor memory cartridge for use in a personal computer system, the cartridge being reprogrammed without removing the circuitry from the cartridge. The cartridge uses a keying-locking circuitry, such as a resistor-capacitor circuit having a unique time constant which must be detected by a cartridge programming system before allowing the programming operation to start. Thus access to a programming system program library is limited only to cartridges having the above-mentioned keying-locking circuitry. A cartridge retailer maintains a master program library and a limited number of such blank cartridges rather than maintaining a large inventory of programmed cartridges.

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