Autonomous display processor

Details Autonomous display processor Autonomous display processor

1977-02-17

1978-09-19

Curtis, Marshall M.

Communications: electrical

Systems

Portable self-contained

346 1, G06F 314

Patent

active

041157656

ABSTRACT:
An autonomous processor for displaying on a video tube both text characters and facsimile data. To conserve memory space the facsimile data is stored in compressed form and is decompressed or unfolded in synchronism with the vertical and horizontal deflections in the video tube. Similarly the text characters are stored in coded form, together with interspaced commands, both inscribed in a list memory. Each character code in the list then selects an appropriate dot matrix from a font memory which also contains displacement data. Selected lines of the font dot matrices are then addressed by row coordinates to form a horizontal video signal, which is accumulated in a ping pong buffer concurrently unloading into a video register. This same video register merges the facsimile data which is concurrently unfolded.

REFERENCES:
patent: 3568178 (1971-03-01), Day
patent: 3588870 (1971-06-01), Kolb et al.
patent: 3623068 (1971-11-01), Horgan et al.
patent: 3754229 (1973-08-01), Manber
patent: 3913719 (1975-10-01), Frey

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