HP41C with Rp Pico attached

[ThomasF]

(06-22-2023 08:38 PM)blackjetrock Wrote:  Feel free to use my code. That uses a 74LVC245 as a level shifter and also has the ISA drive to emulate a ROM.

Thanks, I will do!

I spent some more time on the character handling, and can emulate most of the display now - even the Goose flies around when it should ...

   
   

Some thing are still missing, like the annunciators, and default alpha register. When [ALPHA] is pressed, the OLED is cleared and not updated with the actual content of the alpha reg, but when entering text into alphareg, the OLED is updated accordingly.

So, I'll continue to analyze the display-commands until I get a driver to drive the ISA-bus for more MLDL experiments ...

Cheers,
Thomas