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Cool! Interesting to see some verilog.

Also, interesting you mention Atari ST in the readme, I wrote a VT52 emulator in m68k assembly for my ST because the built-in emulator couldn't keep up with maximum baudrate (my ST did not have a blitter chip). Salvaged it from a floppy disk a couple of years ago and put it on gh: https://github.com/remvee/st-tty

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Great I will check it out! I got interested in the ATARI ST when I read about the VT52 extensions in the Wikipedia and I wanted to try 4 bits color for foreground/background and palettes.

I have this hardcoded to 9600bps but it should be able to do up to 115200 with no problem.

I really want to explore the space of modest processor with custom chips like Commodore & Atari did on their 8bit and 16 bits systems. I find it way more interesting/fun than the ultimately successful superscalar/big cache/big gpu that we ended up with, and fpgas make it very easy to test things out.

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