Acorn BBC Micro Model B

RH-E9DB

The machine the BBC's Computer Literacy Project was built around, and so the one a generation of British children learned on. Acorn's engineering is the draw: a 6502 clocked properly, four-channel sound, seven display modes and an expansion bus that made it the standard laboratory and school controller for a decade. Collectors watch for the Ferranti ULAs, which fail and take the display with them, and for the 8271 floppy controller of an early board.

Details

Manufacturer
Acorn
Model
BBC Micro Model B
Year
1981
Chassis
beige case, black keys
CPU
Rockwell 6502A-2
Installed RAM
16× 4116 (32 KiB)
OS
Acorn 1.20
Condition
Faulty
Notes
Note says "continuous tone, psu partially re-capped, everything socketed"

Machine

Catalogue model
BBC Micro Model B — Acorn, 1981
Board
Issue 7
Style
Model B
Region
PAL (UK)

Chips fitted

CPU ✓

Rockwell R6502A

Video ULA ✓

VC2069

Serial ULA ✓

Ferranti 2C199E

CRTC ✓

Hitachi HD6845

Floppy controller ✓

Intel 8271

OS ROM ✓

OS 1.20

BASIC ROM ✓

BASIC I

Files

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History

2026-08-19
note test

Photograph