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That's awesome. Is the port primarily the creation of a library for the the C1P, or did you have to make changes to the compiler to avoid interference with page zero locations required by the ROM? On the one hand the port consists of the creation of a library for C1P-specific hardware access. At th...

Hi, for a while now I've been working to add the C1P as a target for the cc65 C compiler (https://github.com/cc65/cc65). I think it's functional enough to share the current state. Demo program: /* * Challenger 1P Hello World Program for cc65. */ #include <conio.h> int main(void) { static const char ...

Welcome Stephan. Great to hear from another OSI user and what a nice C1P. Thanks, I'm glad to hear that you like it! I always treated it very carefully... We are happy to help sort the RS232 for you. What test equipment do you have ? I have a working C1P RevD with serial @ 600/2400 baud that I use ...

Hello everybody, my name is Stephan and I live in Germany near Munich. The C1P was my first computer. I got it back in 1980 when I was 16 years old, and with it I learned programming. In 2013 I fetched it out of the basement, cleaned it and turned it back on. Here are a few photos on Google +: https...