Accession Number : ADD012130

Title :   Portable Minicomputer for Testing Memories.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Brown,Carleston O

Report Date : 17 Dec 1985

Pagination or Media Count : 16

Abstract : This patent is a portable high speed minicomputer tester is disclosed for isolating failures in a random access memory. The device includes a central processing unit having an address counter and means for generating a plurality of test words. Individual test words are generated automatically and stored in both an internal memory and the memory under test. At a predetermined address, a test word is read out of the memories and compared. If there are any discrepancies, the minicomputer sets a latch corresponding to the failed test word bit and identifies the failed bit on a digital display readout. Using fault conversion tables, an operator can trace a discrepancy to the bit location of a memory chip in the memory under test.

Descriptors :   *PATENTS, *RANDOM ACCESS COMPUTER STORAGE, *TEST SETS, DIAGNOSTIC EQUIPMENT, MINICOMPUTERS, PORTABLE EQUIPMENT, FAULTS, COMPARATORS, INTEGRATED CIRCUITS, CHIPS(ELECTRONICS), FAILURE(ELECTRONICS), ISOLATION, ADDRESSING, COUNTERS, LATCHES, DISPLAY SYSTEMS, SCHEMATIC DIAGRAMS

Subject Categories : Electrical and Electronic Equipment
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE