"Advanced Micro Computers Inc Microprocessor
Development System 29/05"
It is a multibus CP/M system for development of 2900
microcode. There were cards available for downloading
of microcode to a target system, and a microassembler.
docs under
http://bitsavers.org/pdf/amd/amsys29
I have a bunch of docs scanned for this system, and the
software.
You're the first person I've heard about coming across one
of these in a long time.