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2. NEC μPD7720 - Wikipedia

   en.wikipedia.org/wiki/NEC_μPD7720

   Detailed descriptions of the μPD7720 architecture are found in Chance (1990), [8] Sweitzer (1984) [9] and Simpson (1984). [10] Briefly, the NEC μPD7720 runs at 4 MHz frequency with 128-word 16-bit data RAM, 512-word 13-bit data ROM, and 512-word 23-bit program memory, which has VLIW-like instruction format, enabling all of ALU operation, address register increment/decrement operation, and ...