Circuit for speeding up a read operation from a ROM, the ROM ser

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395496, G06F 1300

Patent

active

055948880

ABSTRACT:
The present invention is to improve the processing capability of a micro processor by speeding up a read operation of program memory stored in a ROM. The present invention comprises a first ROM for storing program data corresponding to even-numbered addresses and a second ROM for storing program data corresponding to odd-numbered addresses. It further comprises an address generator circuit for adding +1 to an address indicated by A1 - An when a least significant address bit A0 is 1. Hereby, when a present read operation is done for an odd-numbered address, an even-numbered address next to the foregoing odd-numbered address is simultaneously read to speed up read operation from a ROM.

REFERENCES:
patent: 4086629 (1978-04-01), Desyllas et al.
patent: 4319324 (1982-03-01), Johnson et al.
patent: 4378591 (1983-03-01), Lemay
patent: 4424561 (1984-01-01), Stanley et al.

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