Product History
Launched in 1981 to coincide with a computer literacy drive by the BBC, the Model B was the more expensive of Acorn's two machines at £399. The machine's high cost was compensated for by very impressive expansion possibilities including disc drives, a second processor and network capabilities (Econet).
Specifications
- Produced:
- Between 1981 and 1994.
- CPU:
- MOS Technology 6502 running at 2 Mhz.
- Co-Processor:
- Not fitted.
- ROM:
- 32 Kb expandable to 128 Kb.
- RAM:
- 32 Kb.
- Display:
- No internal display.
- Keyboard:
- 74 key full action.
- Integrated Storage:
- None.
- Sound:
- Four independent sound channels (one noise and three melodic) using the Texas Instruments SN76489 sound chip.
- Text modes (characters):
- 20 x 32, 40 x 25, 40 x 32, 80 x 25, 80 x 32.
- Graphics modes:
- 160 x 256 (4 colours), 160 x 256 (8 colours), 320 x 200 (2 colours), 320 x 256 (2 colours), 320 x 256 (4 colours), 480 x 500 (8 colours), 640 x 200 (2 colours), 640 x 256 (2 colours).
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