Vintage John Bell Engineering computer / control interface board.
Board markings:
The board features two NEC D8255AC-2 programmable peripheral interface chips, multiple logic ICs, six blue socket positions labeled A1-A3 and B1-B3, DIP switch assembly, and edge-card connector.
This appears to be a vintage digital I/O / interface board intended for computer-controlled, laboratory, data acquisition, or industrial control applications.
Exact original system application and compatibility are unknown.
Condition:
Vintage used condition with cosmetic wear consistent with age and storage. Components, sockets and edge connector are present as shown in the photos.
The gold edge contacts show normal insertion/contact wear.
We do not have the original equipment or test setup required to properly test this board.
SOLD UNTESTED.
No guarantee is made regarding functionality, calibration, compatibility, or remaining service life.
Please examine all photos carefully for the exact board configuration and physical condition.
Quantity 2 available. Price is for ONE board.
You will receive one John Bell Engineering 86-108B REV-B board similar to the examples pictured. Minor cosmetic differences may exist between the two boards.
No cables, documentation, software, I/O modules, or other accessories are included.
Vintage electronic component sold as-is in untested condition.
