HP-92 Simulation Attempt

[teenix]

(07-02-2017 09:26 PM)PANAMATIK Wrote:  The HP-91 ROM code is available http://www.hpmuseum.org/forum/thread-8611.html

I thought the HP91 and the microcode might be easy to get going but alas, not to be.

I'm sure I translated the source code properly so it works with my emulator, but even after going through all the possible key codes (0 - 255), only 0,1,5,6,9 of the digit keys work, and not all of the other key functions. Those that do work give the correct results on the display, although the display decoding appears to be a little different than I have seen before.

There also seems to be a similar hardware interface like the HP19c for the two switches, which I haven't figured out yet.

Nothing like a challenge :-)

cheers

Tony