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Mullen Extender Boards
This was a well designed S-100 extender board that allowed you to examine any S-100 board while present in the S-100 bus.
It had a basic TTL logic probe onboard.  There were at least four versions of the basic board -- of increasing sophistication as to the logic probe. Here are two:-

Mullen Ext 1

Mullen Ext 2

The edge connector at the top of the board is fairly fragile, if you are not careful to pull an S-100 board straight up out of the socket you can crack the sides of the socket.

The manual for this board can be obtained here.

The schematic for the TB-1 board can be see here.

The schematic for the TB-4 board can be see here.

Other Mullen S-100 Boards
Extender Board     Relay Board


This page was last modified on 03/20/2016