HP-97S I/O testing

[TellyS]

Ralf,

I know that the intention was to connect to simple devices, such as a scale that would weigh an envelope and the HP program would calculate the postage. There were probably similar devices that it was used for.

I have connected it to a few more things, like a Mitutoyo caliper (just because I had one). The caliper has an interface that reports the measurement with the press of a button. It was used for quality control. The caliper would measure and print certain measurements of a manufactured part to a Mitutoyo printer, but it was fairly easy to interface it with the 97S to do the same.

The attached PDF shows the pin assignment and signal format. I had to create a special cable for it.

Telly