TRS-80 Model 4
May 1983, Radio Shack introduces the TRS-80 Model 4, with 4-MHz Zilog Z80A
microprocessor, 16KB RAM, cassette or 180KB 5.25-inch floppy drives, keyboard,
80x24 text 12-inch B/W monitor, optional CP/M, speaker, Model III Basic
in ROM, for US$2000.
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Z80A CPU
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64K RAM
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1 Parallel port
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1 I/O Bus connector
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1 RS-232C connector
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1 Cassette I/O
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Model; 26-1059
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SN; 61
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