DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
Probing a GI 250
Chip of a Litton Royal Digit III calculator. |
Observed signals
of the GI 250 singe-chip calculator circuit outputting one 4-digit group
of its 8-digit display register. |
Probing a GI 251
Chip of a Litton Royal Digit VI calculator. |
Observed signals
of the GI 251 singe-chip calculator circuit alternating two 4-digit groups
of its 8-digit display register. |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, June 29, 2025. No reprints without written permission.