Electron beam pattern generation system

Details Electron beam pattern generation system Electron beam pattern generation system

1981-12-28

1985-07-23

Krass, Errol A.

Boots, shoes, and leggings

2504922, 364518, G06F 1540

Patent

active

045311919

ABSTRACT:
Bit pattern data stored in an external memory unit is read out under the control of a microprocessor for being compressed in a data compressing unit and then stacked in a memory unit. At the time of storing data in the memory unit, all the stripe data constituting one chip frame are written in a state capable of being made high speed sequentially accessible at the time of the read-out without need of dividing a memory bank into portions for the individual stripes but by continuously using the address space covering the entire memory areas. This is effected by a memory management unit and a memory module management unit provided in the memory unit.

REFERENCES:
patent: 4056828 (1977-11-01), Furuta
patent: 4151421 (1979-04-01), Sumi
patent: 4280186 (1981-07-01), Hidai et al.
patent: 4387433 (1983-06-01), Cardenia et al.
patent: 4433384 (1984-02-01), Berrian et al.
Journal of Vacuum Science and Technology; vol. 15, No. 3, 1978, pp. 874-877, A. M. Patlach et al.

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