Computer with a memory system for remapping a memory having two

Details Computer with a memory system for remapping a memory having two Computer with a memory system for remapping a memory having two

1980-05-16

1983-05-10

Zache, Raulfe B.

Boots, shoes, and leggings

340726, 340799, G06F 1306, G06F 314

Patent

active

043832962

ABSTRACT:
A microcomputer system with video display capability, particularly suited for small business applications and home use is described. The CPU performance is enhanced by permitting zero page data to be stored throughout the memory. The circuitry permitting this capability also provides a pointer for improved direct memory access. Through unique circuitry resembling "bank switching" improved memory mapping is obtained. Four-bit digital signals are converted to an AC chroma signal and a separate luminance signal for display modes. Display modes include high resolution modes, one of which displays 80 characters per line.

REFERENCES:
patent: 3821730 (1974-06-01), Carey et al.
patent: 3893075 (1975-07-01), Orban et al.
patent: 3903510 (1975-09-01), Zobel
patent: 3980992 (1976-09-01), Levy et al.
patent: 4136359 (1979-01-01), Wozniak
patent: 4150364 (1979-04-01), Baltzer

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