CPU
Rockwell R6502A, Synertek SY6502A, MOS 6502A
Acorn BBC Micro Model B
Acorn · 1981
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.
As catalogued
- Maker
- Acorn
- CPU
- Rockwell 6502A-2
- Memory
- 32K
- Board issues
- Issue 1, Issue 2, Issue 3, Issue 4, Issue 7
- Styles
- Model B, Model A upgraded to B
- Regions
- PAL (UK)
- Chassis
- beige case, cream keys
- OS
- Acorn MOS 1.20
Chips
Video ULA
Ferranti 5C022E, VideoProc (VIDPROC)
Serial ULA
Ferranti 2C199E
CRTC
Hitachi HD6845, Motorola MC6845, Synertek SY6845
Floppy controller
Intel 8271, WD1770, WD1772, none fitted
OS ROM
OS 0.10, OS 1.00, OS 1.20, OS 2.00 (B+), MOS 3.20, MOS 3.50
BASIC ROM
BASIC I, BASIC II, BASIC IV
