How can one test a DEC M9313 "Unibus Exerciser and Terminator" (UET)?

Glen Slick glen.slick at
Thu Apr 2 12:13:37 CDT 2009

On Wed, Apr 1, 2009 at 9:13 PM, Ethan Dicks <ethan.dicks at> wrote:
> AFAIK, it's a terminator and several loopback registers, but the
> specific nature of them is unknown to me.

Did you already look at Appendix F, UNIBUS EXERCISER TERMINATOR in the
manual EK-DWBUA-TM-001 DWBUA UNIBUS Adapter Technical Manual?

It has bit level descriptions of the M9313 Address Register, Data
Register, and Control Register.

I don't know anything about this myself, but looked at the doc just
now out of curiousity.


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