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Classic, Woodstock and Spice Emulators
05-30-2017, 10:42 AM (This post was last modified: 05-30-2017 10:43 AM by PANAMATIK.)
Post: #107
RE: Classic, Woodstock and Spice Emulators
(05-30-2017 02:55 AM)teenix Wrote:  Hi Bernhard

I finally had a fiddle with the code and not sure how reliable it will be, but I have a text microcode file for the 29C with the pause modification in it.

The pause will stop immediately if a key is pressed.

Yes, it works. Brilliant solution by just altering 6 instructions. You were very lucky to find the 5 nops at 5773 to 5777 for this patch. And you adjusted the Pause loop time by loading 5 instead of 6 in the c register.

Congratulations! You removed a HP-29C bug after 40 years! Interestingly the twin calculator HP-19C did not have this bug. I will implement this in my HP-29E and in the HP-29 PC emulator.


That's one small step for a man - one giant leap for mankind.
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RE: Classic, Woodstock and Spice Emulators - PANAMATIK - 05-30-2017 10:42 AM

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