Solid state mass memory system compatible with rotating disc mem

Details Solid state mass memory system compatible with rotating disc mem Solid state mass memory system compatible with rotating disc mem

1978-10-16

1981-10-13

Shaw, Gareth D.

Boots, shoes, and leggings

365230, G06F 300, G06G 748

Patent

active

042952050

ABSTRACT:
A solid state mass memory system, utilizing memory units other than rotating disc memories, compatible with existing external rotating disc memory equipment designed to operate in conjunction with rotating disc memory units only, includes means for simulating a rotating disc memory with respect to a disc memory controller. The system includes means for generating synthetic origin, sector and bit clocks for input to the computer disc controller, the pulses being several orders of magnitude faster than those obtainable with rotating disc memories. Upon detection by the controller of the proper sector, means are provided for halting the synthetic sector pulses while a normal read/write operation takes place. At the end, a further sector clock is generated, and the system may proceed to a further read/write operation or proceed in a standby mode in the absence of a read/write signal. In this manner, advanced, solid state external mass memory systems may be employed in conjunction with a memory controller designed to operate with only rotating disc memories, without requiring replacement of said disc memory controller with expense memory control equipment designed to operate with solid state external mass memory systems.

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patent: 4053944 (1977-10-01), Dixon
patent: 4068304 (1978-01-01), Beausoleil et al.
patent: 4084229 (1978-04-01), Taylor et al.
patent: 4145745 (1979-03-01), De Bijl et al.
Bantz et al., "Enhanced I/O Subsystem Using a Device Engine" in IBM Tech. Discl. Bulletin, vol. 19, No. 10, Mar. 1977, pp. 4043-4044.

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