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From: <gr...@gm...> - 2025-02-04 15:08:17
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Am Freitag, 31. Januar 2025, 17:10:09 Mitteleuropäische Normalzeit schrieb Boris Steinmetz: > I have a question which I need a little bit support with. > I have VICE running on a Raspberry Pi 5 (Raspbian OS). Now I'm looking for > a way to control 8 GPIOs from the Raspberry Pi from within the VICE > emulated C64. On these GPIOs I have hooked up some LEDs. This works fine, > but since I'm not a professional software developer I'm not sure if my > approach is really good. Maybe you have a better proposal. > > On the Raspbian side, with the GNU debugger (gdb) and some Python scripts, > I was able to find the memory addresses used in the Raspbian OS for the > VICE C64 memory location $C000 - $C007 and also the memory range used for > the C64 screen memory. > But for some reason I can't find the memory locations $DD00 and upwards > which is to control the CIA2 for the user port. I did same way as I did to > look up $0400 and $C000 by putting a pattern of some values in it which I > was then looking for with a python script. As mentioned, it did work fine > for $0400 and $C000 but not for $DD00 and upwards. > > Do you know how I can find this memory locations or do have a better > proposal for me to emulate the userport on my raspberry pi from within VICE? > > Thanks a lot for a helpful advice!! > Have a nice day. First of all - use a recent VICE release (the last one, 3.9) now look at src/userport/userport_io_sim.c at the top uncomment #define HOST_HARDWARE_IO then scroll down to "userport_io_hw_store_pbx" (and following) functions, there you can add the gpio handling code -- http://hitmen.eu http://rr.pokefinder.org http://vice-emu.sourceforge.net http://magicdisk.untergrund.net Every program has at least one bug and can be shortened by at least one instruction --- from which, by induction, one can deduce that every program can be reduced to one instruction which doesn't work. |