Cool! Reminds me of Professor Kelly's EASy68K simulator for 68K CPUs.
Sent with Proton Mail secure email. ------- Original Message ------- On Tuesday, August 9th, 2022 at 7:49 PM, Jim Hall <jh...@freedos.org> wrote: > Hi everyone > > Some of you know that I also teach a "100" level university course > about technology. This year, I decided I wanted to show off a simple > computer, to demonstrate how a CPU works. I was looking for something > simple and "old school" like an Altair 8800, where you enter > instructions and can watch it execute, and see the accumulator update. > But I couldn't find a hardware kit on sale in the price range I was > looking for. > > So I wrote a simple CPU emulator to use in class. I call it the "Toy CPU." > > I intentionally kept this as a very simple implementation. My goals > were to make it easy to write and easy to understand. > > The Toy CPU implements 256 bytes of program memory, and an > accumulator. You program the Toy using binary opcodes. When you run a > program, the Toy CPU starts at zero for the first instruction. This is > a Minimal Instruction Set Computer with a limited set of instructions > (similar to a CPU from the 1960s or 1970s) but it can do enough real > work that I can use it in class to explain how computers work. > > Version 1.0 is a working (but incomplete) prototype that runs on DOS > (compile with OpenWatcom). Emphasis on prototype - I wrote this in > an afternoon without a design. > > I rewrote most of it to create Version 2.0. This currently runs on > Linux under ncurses, but I plan to port it back to DOS. This version > also supports entering a program using the "front panel" using > "switches and lights" similar to the 8800. > > If you're curious, you can find it here: > > https://github.com/freedosproject/toycpu > > MIT license > > > _______________________________________________ > Freedos-devel mailing list > Freedos-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-devel _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
