John Bell Engineering was a small firm producing microprocessor many boards between 1980 and 1990.
The early boards were 6502 and Z80 SBC’s, later boards were for the Apple II, and the last ones for the IBM PC bus.
I present here, what I have found, of John Bell 6502, Z80 and Apple ][ boards.
- John Bell PN 80-153
- John Bell PN 81-260
- John Bell PN 82-300
- John Bell PN 80-Z80
- John Bell Apple 6522 card
- John Bell Apple 16 bit A/D
- John Bell Apple Cards
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John Bell catalog 1984 |
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John Bell catalog 1988 |


See also:
PicoSYM, a SYM-1 emulator on a Raspberry Pico
Emulation of a Synertek Sym-1 on a Raspberry Pi Pico 1 (W).
By andysa on the emulation forum on 6502.org
Here is t...
Amazing it works!
After publishing the photos of the transistors used in the KIM-1 a discussion started on forum64.de in the 'Instandsetzu...
Transistors in the KIM-1
Even a microprocessor based computer as the KIM-1 required some simple transistors.
To drive the LEDs some extra curren...




