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Fungus · (This post was last modified: 06-11-2018 11:59 AM by Fungus.)

(06-10-2018 11:20 PM)rprosperi Wrote:
(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.

Data format isn't a problem. One of the reasons for using BCD in the first place is that it's easy to display (it's actually a lot harder for the computer to to compute with than binary).

(06-10-2018 11:20 PM)rprosperi Wrote: 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.

Anything is possible with the Nut emulator. It's software.

From what I've seen the Nut CPU is one chip (LF5)and the ROM/RAM/display driver is on another chip (LE2). All you need to do is detect when the display chip is being accessed and do the x+Y+Z registers at the same time.

If the Swiss Micro calculators are working then they already detected when the X register is being converted to displayable data. ie. The job is 99% done.