Microcomputer apparatus with video display capability

Details Microcomputer apparatus with video display capability Microcomputer apparatus with video display capability

G - Physics

06

F

354/239

G06F 12/06 (2006.01) G09G 1/28 (2006.01) G09G 5/22 (2006.01)

Patent

CA 1165007

ABSTRACT OF THE DISCLOSURE 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. 4-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.

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