old stepper drives

[aegfurn]

Hi all,
I've got some old machines that I want to play with, but I'm not good at electronics. Can anybody tell by looking whether this drive will accept pulse/ direction signals and if so, which leads would do that?

[pastera]

Does it have any part or model numbers?

Aaron

[aegfurn]

The drives were made by Piexx- 2.5 amp stepper drive 400405 rev A and 3.5 amp microstepper drive 400100 rev B. Each board has a micro controller and an eprom chip on it.

[pastera]

I found a PIEXX company in Hillsboro, NH but they don't have any stepper driver listed.

Aaron