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BBC Model B

BBC Model B

Acorn BBC model B. The Model B had the same features but had 32 KB RAM (expandable to 64K).

The “Tube” was an expansion port which was designed to connect other processors to the BBC (6502, Z80, 68000 or ARM 1 RISC). An interface card was specially designed for the tube. It used another 6502 and a Z80.

One of its most popular peripherals was the “Torch” floppy disk unit, a 5.25″ floppy disk drive with a Z80 which allowed the BBC to use CP/M software.