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Additional Pictures 

 

This Western Auto M4987 was manufactured in April 1977 by
Texas Instruments in Lubbock, TX (Date code 1577 LTA week 15 year 1977).

The M4987 manufactured in April 1977 in Lubbock, TX
with the front part of its housing removed.

The printed circuit board (PCB) of the featured M4987
is centered around a TMS0972 single-chip calculator circuit.

Close-up view of the TMS0972 packaged in a
28-pin SPDIP (Shrink Plastic Dual In-line Package).

Product Label Style 3, Western Auto of the featured M4986.


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If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, June 14, 2003. No reprints without written permission.