HP97 The journey begins
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12-07-2021, 08:47 PM
(This post was last modified: 12-07-2021 08:50 PM by teenix.)
Post: #540
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RE: HP97 The journey begins
Hi all,
Just for info, the processor that I am using for the HP-97 project is a PIC18F66K40 as it does all I need and before the chip shortage was quite cheap. Except for a possible bug that is eluding me at the moment, the substance of the code has been completed. The source code is written in raw assembler (as I don't know C) and the used ROM in the PIC is about 58% of the 64KB available. As such there is room to possibly add the microcode and PIK character ROM for the HP-91. The keyboard layout would need some thinking about as the left side is a lot different to the 97, no card reader and it has a DEG RAD GRD switch instead of PGM RUN. The left side keyboard would probably use a 4 x 4 key pattern in the lower left of the 97 keyboard. The menu options accessible from the calculator or PC program so far are: Show Model at switch on Yes/No Card Read/Write/Delete/Find Blank Write Protect Override On/Off Notes Mode On/Off Bluetooth On/Off Constant Memory On/Off HP97S Mode On/Off Key Debounce Normal/Long Print Speed +/- Print Intensity +/- Printer Select HP/IR Beeper On/Off Time adjust Date adjust Alarm On/Off/Adjust cheers Tony |
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