The Four-Phase Systems AL1 was an 8-bit bit slice chip containing eight registers and an ALU It was designed by Lee Boysel in 1969 At the time, it formed part of a nine-chip, 24-bit CPU with three AL1s, but it was later called a microprocessor when, in response to 1990s litigation by Texas Instruments, a demonstration system was constructed where a single AL1 formed part of a courtroom demonstration computer system, together with RAM, ROM, and an input-output device
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