公开(公告)号：CA1209276A

公开(公告)日：1986-08-05

申请号：CA458356

申请日：1984-07-06

Applicant: IBM

Inventor： KUMMER DAVID A ,  WEBB GARY E

IPC: G11C17/00 ,  G06F9/04 ,  G06F12/06 ,  G06F13/00 ,  G06F17/00 ,  G11C5/00 ,  G06F12/02

Abstract: MICROCOMPUTER SYSTEM EMPLOYING PROGRAM CARTRIDGES A microcomputer system employs internal read-only memory devices and external read-only memory devices in pluggable cartridges. Each cartridge includes jumper links in leads from the external memories through the cartridge socket to a memory select unit and jumper links in leads leading from earth through the cartridge socket to enable inputs of the internal memories. By linking selected ones of the jumper links in the cartridge, the external memory can be used as an add-on memory or as a base memory replacing the internal memory.

公开(公告)号：CA1200861A

公开(公告)日：1986-02-18

申请号：CA458354

申请日：1984-07-06

Applicant: IBM

Inventor： FREEMAN JOSEPH W ,  WEBB GARY E

IPC: G06F3/00 ,  G06F1/00 ,  G06F1/18 ,  G06F1/24 ,  G06F15/78 ,  G11C5/00 ,  H01R13/703 ,  H01R29/00 ,  H05K1/02 ,  H05K1/11 ,  H01R23/70

Abstract: RESET SYSTEM FOR MICROCOMPUTER USING PROGRAM CARTRIDGES Cartridges for a microcomputer have two adjacent edge connectors replaced by a single connector with a projection which passes into the area in which the adjacent connector would normally be placed. When the cartridge is inserted or removed from the connector socket in the microcomputer the projection transiently contacts the associated socket contact. A fixed potential (for example earth potential) normally applied to the main portion of the edge connector from its associated socket contact is therefore transferred to the transiently contacted socket contact to provide a reset signal for the microprocessor of the microcomputer. Thus, the microprocessor is reset each time a cartridge is inserted or withdrawn.