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Acorn System 1

1979–1981 · desktop

Specifications

Cpu: MOS Technology 6502, 1 MHz
Ram: max: 1 KB (fixed) · base: 1 KB (2x 2114 1024x4 RAM)
Ports: Cassette port · Eurocard expansion bus edge connectors
Display: 25-key hex keypad input, small LED display, no video output on the base unit
Storage: base: Cassette tape via built-in port (Kansas City Standard), no internal storage · options: Eurocard expansion bus could add further memory or storage boards
Os Support: latest: None (raw 6502 machine code monitor in ROM) · shipped: None (raw 6502 machine code monitor in ROM)
Release Price: £65 (kit); £79 (assembled)

Upgrade paths

other

Additional Eurocard boards (memory, video, I/O) via the expansion bus · Acorn's first product, sold as a bare-bones kit or assembled two-board Eurocard system; the direct precursor to the Atom and, eventually, the BBC Micro.

varies, period boards were sold separately

HARD