DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
| The leading TXI- designation on the label
of the Montogomery Ward P8F calculator reveals the manufacturer: Texas Instruments.
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| The printed
circuit board (PCB) of the Montgomery Ward TXI-8644A is used with the P8F and P8P calculator. More important is the number etched in the PCB: 13-04-709-504.
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The small display board carries on the backside a
similar number starting with the 13-04-709 code.
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The front of the display board finally gives an
important link: The Texas Instruments logo identifies the manufacturer of calculator with 13-04-709 numbers. And we know a lot of them.
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If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, February 26, 2003. No reprints without written permission.
