Thursday, July 20, 2017

Varian 620i

Seems to be pickings from a printer or graphics subsystem.  Trying to puzzle it out.

Friday, July 7, 2017

Datum MDP/1-MPU

Front panel for Datum mini computer.  Seems to have been microprogrammed, judging by the front panel display / switch to examine or display control store.

16 bits, has a switch for selecting display or examine of 4 registers.

Also, nicely, it has hexadecimal display with the switches grouped by 4 bits.