Data display system designed as a microcontroller

Details Data display system designed as a microcontroller Data display system designed as a microcontroller

1975-03-31

1978-04-18

Zache, Raulfe B.

Boots, shoes, and leggings

G06F 314

Patent

active

040854426

ABSTRACT:
A programmable read-only memory (PROM) provides a fixed stored microroutine to logic circuitry which controls the fetching of data from a memory to a variable number of video display units. The microroutine includes a small number of micro subroutines that are utilized to fetch the addresses in a separate main memory, where character data is to be found. Similarly, subroutines are provided for obtaining entry marker (cursor) addresses from the main memory. Additional subroutines are provided for indirectly addressing the main memory for the character data which undergoes encoding by a character generator that is capable of providing video information to eight channels.

REFERENCES:
patent: 3568163 (1971-03-01), Osborne
patent: 3760375 (1973-09-01), Irwin et al.
patent: 3778775 (1973-12-01), Haring et al.

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