Multiline HP15C

[rprosperi]

(06-10-2018 10:55 PM)Fungus Wrote:  The whole point is that it wouldn't need any firmware change. The contents of the X,Y and Z registers will be visible to the emulator, all you need to do is display them.

I may be wrong, but I think that's naïve. The 15C firmware's XYZ&T 'registers' contain binary data (actually BCD, the point is it is not stored the same way it's displayed), which the 15C f/w formats for display in the LCD. How would the hardware emulator layer read, re-format and display multiple registers simultaneously with the 15C f/w running? That is not possible with a Nut emulator, that would require a dramatically more sophisticated system.