Circuit Board for Use with Microcomputer, EXT by IMS Associates Inc.
date: label: date made
content: 1977
notes: label: Description
content: Donor and former user Barry Berg explained the use of this extension circuit board as follows: " If you had a problem or needed to look at signals on particular card or something and hook your scope up, when you go inside the case, you'll notice the cards are really densely packed together. You could never get a probe or you could never even see some of the cards,so you pull the card out and you'd put this into this space on the S-100 bus and then you'd stick the card into it and then so the card would be sitting up above the case and you could easily get to all the components and adjust them and read the signal pulses out to debug them." In other words, the circuit board simply extended the wires on the S-100 bus so that a circuit board could be inserted in it above the other circuit boards in a microcomputer for examination and testing.The wires are marked 1 (at the left) and 50 (at the right) on one side, and 51 (on the left) and 100 (on the right) on the other. On the front side, the board is marked in the right hand lower corner: EXT (/) 1977 IMS ASSOC INC.
label: Description
content: Reference: Acquisition file.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Computers
label: See more items in
content: Computers & Business Machines
creditLine: label: Credit Line
content: Gift of Barry S. Berg
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2012.3060.06
label: catalog number
content: 2012.3060.06
label: nonaccession number
content: 2012.3060
objectType: label: Object Name
content: circuit board
physicalDescription: label: Measurements
content: overall: 1 cm x 25.4 cm x 16.4 cm; 13/32 in x 10 in x 6 15/32 in