Signetics 8X300

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The Signetics 8X300  (P/N 156-1164·00) is an early RISC-like microprocessor monolithic integrated circuit use in the 4054 Option 30 to display refreshed graphics.

See Signetics 8X300 @ Wikipedia

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Some instruments using part Signetics 8X300

Instrument Manufacturer Class Model Description Introduced
4054 Tektronix Computer 4054 Graphics-capable desktop microcomputer 1978
4663 Tektronix Printer 4663 Interactive digital plotter 1979