HP41C with Rp Pico attached
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07-13-2023, 07:16 AM
Post: #27
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RE: HP41C with Rp Pico attached
Hi again,
Some progress with the Tiny Pico and the 41 display. I have now managed to emulate the display*, with annunciators and all. I have not done a bitmap of the annunciators, but shortened the text (US=USER, P=PRGM etc). During development I had some problems with some display-commands that added garbage to the display, until I realized that some constants (ie from a "LDI CON" instruction) were treated as commands instead of data. So, I had to add a "disassembler" as well to have correct instruction decoding, so now I can trace the execution in "realtime" too (* Just noticed that the rightmost punctation is missing in the display ... need to fix that!) Code: - DCE:0 ADDR:009F (000237) INST=0266 (1146) PA=01 (001) DATA=0000000224048001 - C=C-1 S&X Check the video running a display test program: https://photos.app.goo.gl/iZWLb3JBPBUkazYD9 (Sorry for the frequency problem - the black stripe on the display...) I have some drivers on the way (thanks Andrew ), so next will be to experiment with module emulation as well ... Cheers, Thomas [35/45/55/65/67/97/80 21/25/29C 31E/32E/33E|C/34C/38E 41C|CV|CX 71B 10C/11C/12C/15C|CE/16C 32S|SII/42S 28C|S 48GX/49G/50G 35S 41X] |
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