Copy reproduction machine with controller self check system

Details Copy reproduction machine with controller self check system Copy reproduction machine with controller self check system

1977-08-30

1978-10-31

Atkinson, Charles E.

Registers

Systems controlled by data bearing records

Time analysis

235304, 235312, 355 14, 364900, G11C 2900, G06F 1100

Patent

active

041229967

ABSTRACT:
An electrostatographic type copying or reproduction machine incorporating a programmable controller to operate the various machine components in an integrated manner to produce copies is disclosed. The controller carries a master program bearing machine operating parameters from which an operating program for the specific copy run desired is formed and used to operate the machine components to produce the copies programmed. A multiple prioritized interrupt system is employed to distribute the operating program to the machine.
Self check routines check the operational integrity of the controller prior to start-up of the machine and periodically while the machine is processing copies.

REFERENCES:
patent: 3838264 (1974-09-01), Maker
Glickstein, Weighted Checksum to Detect and Restore Altered Bits in Mar. 1971, pp. 3146-3147.
Computer Memory, I.B.M. Technical Disclosure Bulletin, vol. 13, No. 10.
Crandall, et al., Dynamic Self-Checking for a Read-Only Storage, I.B.M.
Technical Disclosure Bulletin, vol. 19, No. 8, Jan. 1977, pp. 2868-2869.

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