Mystery HP 1000 board

The boards are also used in the HP 5420A/B Dynamic Signal Analysers and the HP 5423A Structural Dynamics Analyser. The boards belong to the 5443 control unit which is actually a M-series processor with some add-ons like the booster board and a custom front panel/keyboard. The analysers consists of three 19"boxes containing the 5441 Display unit, 5443 Control unit ant the 5441 AD-coverter and Digtal filter. The boxes are connected through the MIOB (Multiple Input Output Bus) a 16 bits bus used to communicate and control the various parts. FYI the HP 5420 and 5423 were used to test parts of the space shuttle program. Some other info of the units are on: http://www.oneillassociates.com.au/~5420/HP5420.shtml Some picture and a short video loading the operation software on: https://www.flickr.com/photos/hp-fix/albums/72157651930423960 -Rik