Random access bubble memory with unified read/write cycle

Details Random access bubble memory with unified read/write cycle Random access bubble memory with unified read/write cycle

1978-06-19

1980-01-01

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Decoder

365 14, G11C 1908

Patent

active

041819772

ABSTRACT:
A random access bubble memory directs a plurality of continuous streams of bubbles toward a plurality of storage loops. A write decoder selects one continuous stream of bubbles. An annihilator then transforms this one continuous stream of bubbles into the desired data pattern which is then stored in a selected loop. While the data pattern is being formed, a read decoder directs the data which had been stored in the selected loop to a bubble detector. This memory has a unified read/write cycle which permits intermixed read and write, read/modify/write, and swap operations. This bubble memory allows a user to remove power abruptly during a read/write cycle without returning a partially processed block to its storage loop and without saving the identity of the block. In a preferred embodiment, the read and write decoders are operated simultaneously by identical control currents.

REFERENCES:
patent: 4032905 (1977-06-01), Chen
patent: 4085451 (1978-04-01), Chen et al.
patent: 4128894 (1978-12-01), Chen

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