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what can anyone tell us about this board? - Printable Version

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what can anyone tell us about this board? - Bruce Larrabee - 05-22-2014 09:34 PM

Take a look at this board. What can anyone tell us about it? I know the following:
1) It's is for a 48 series.
2) It's made by HP.
3) It supports a buzzer.
4) It accesses the keypad

[Image: Untitled-1.jpg]

[Image: Untitled-2.jpg]


RE: what can anyone tell us about this board? - rprosperi - 05-22-2014 10:53 PM

Complete SWAG (thats a Scientific WAG): IR Printer board?


RE: what can anyone tell us about this board? - Paul Berger (Canada) - 05-22-2014 11:59 PM

That board looks like it would completely replace the electronics board in a 48 so my guess would be either it was used to integrate a 48 style keyboard into another device or was used in development of the the second generation 48S machines that used a Yorke processor or the 48G series. By the time those calculators where in development they would have already had the the keyboard for the earlier 48S and with this board they could conveniently hook the keyboard to development hardware that they could have out in the open for instrumenting, and also for code development could include an EPROM for easy update which would not fit the finished machine.