I like the 1970's/early 1980's Tektronix 4051, 4052 and 4054 computers.
I used one in the 1970's and bought a 4052 and 4054 with some accessories in 2000.
One of the accessories I picked up was a Tektronix 4052/4054 System Test Fixture - since I had the 4052 and 4054 that needed repair.
I've since repaired the 4052 and 4054 - but never found any documentation on using the System Test Fixture.
I've checked the 4052 and 4054 Service Manuals - and they don't mention this test fixture. Maybe it was just for the factory?
There was a 4051 System Test Fixture and the 4051 Service Manual has a section on using it to debug DRAM memory.
Here is a picture of my 4052/4054 System Test Fixture:
Inside are two boards - one has the ribbon cables attached and includes three EEPROMs that I downloaded and posted on my Tektronix 4051/4052/4054 Program archives github site in a 4052 System Test folder:
https://github.com/mmcgraw74/Tektronix-4051-4052-4054-Program-FilesThe second board has the keypad, LEDs, switches, and includes a Motorola 6800 CPU (no surprise - Tektronix 4051 computer had a 6800 CPU).
Has anyone seen any documentation for this Tektronix computer tester?