MAINDEX-11 CZKMA Diagnostic?

Ben Sinclair ben at
Tue Aug 18 21:36:35 CDT 2015

I'm again trying to debug my PDP-11/23, and I believe I'm having
trouble with my M8067-LB/MSV-11 memory.

According to the manual, there is a diagnostic program called CZKMA
(for my 18-bit system), but I can't seem to find it.

I have all of the xxdp images from AK6DN, but this one doesn't appear
to be on any of those. Some searching shows references to it and even
a (poorly) scanned source listing, but does anyone know if I can get
it on a TU58 image or another format?


Ben Sinclair
ben at

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