HP Classic upgrade kit - Multi Emulator (updated list of emulated models)

[teenix]

(05-24-2018 11:32 PM)rprosperi Wrote:  Careful Tony, folks will become spoiled and start to expect quick fixes

Luck of the draw that time

It was a strange bug. It would only appear when a HP code line executed under a certain condition, otherwise things ran fine.

These bugs are very hard to find so to try and work with them, awhile back I created a small monitor program. This can capture every HP instruction that the PIC executes, plus program counter and register values and then I can compare the output to the PC emulator.

After narrowing down the problem, I checked the source for the PC emulator and it had a small piece of code that the PIC didn't have. Once put in, all was ok.

cheers

Tony