HP41C with Rp Pico attached

[MeindertKuipers]

Hello all,

After some time of developing and debugging I am now happy to announce that I have HP-IL emulation up and running on my RP2040 Pico setup. I can succesfully do a READP from (simulated) mass storage and use the (simulated) HP-IL printer.

Many thanks to Christoph Giesselink (I have used the HP-IL part of the V41 sources, especially the HP-IL register handling, which I believe also originates in part from Jean Francois) and Jean-Francois Garnier (I had to dive in the PILBox sources and some of his ILPer sources, and his PILBox documentation helped a lot).
In my setup I am emulating the HP-IL module and the PILBox on the RP2040, and there is now a direct USB virtual serial port from the PICO hardware to the PC. PyILPer really thinks that there is a PILBox connected at a speed of 230400 baud.

This is all very much in development and on a breadboard, but I hope to do a hardware design at some time.