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Show HN: Turbine – 16-bit CPU Architecture and Emulator built in C
Github: https://github.com/errorcodezero/turbine https://github.com/errorcodezero/turbine
- lioeters 1y agoFun article and project. I enjoyed reading and playing around with it. My first run of `make release` failed with this error. cc -std=c11 -Wall -Wextra -Werror -pedantic -O3 -DNDEBUG -c -o build/main.o src/main.c src/main.c: In function ‘main’: src/main.c:23:3: error: ignoring return value of ‘fread’ declared with attribute ‘warn_unused_result’ [-Werror=unused-result] 23 | fread(file, file_size, 1, fp); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors It might have something to do with my local setup. It was simple enough to solve, to check the return value and exit with error code.
- johnisgood 1y agoYes, to fix it: either check its return value, or add "(void)" at the end of the function, e.g. "(void)fread(...)". Since they did not add "(void)", I assume they meant to check the return value, they just simply forgot.
- johnisgood 1y agos/end/beginning/
- errorcodezero 1y agoAh oops small mistake with the C file handling. Thank you for the kind words on my project and finding the issue I'll be sure to fix it when I get the time.
- lioeters 1y agoThe article was really good, explaining the details of how the virtual machine works. I starred the Git repo, good luck with the Hack Club!
- errorcodezero 1y agoThank you for the star. It means a lot that you found the stuff I make cool.
- drob518 1y agoFun project. You might want to build an emulator for a real 16-bit CPU like a 6502. That would allow you to run real, existing software on it. That way you don’t have to write your own code.
- AlexeyBrin 1y ago6502 is an 8-bit CPU. Writing an emulator for it would be cool though.
- vardump 1y agoIt's interesting how arbitrarily CPU bitness is defined. Sometimes it's the register size, sometimes data bus width and sometimes the address width. 6502 has 8 bit registers, 8 bits wide data bus, and 16 bit addresses. Only PC register is 16-bit, but 6502 does have a zero page indirect 16-bit addressing mode.
- wang_li 1y agoSometimes by register size, sometimes by ALU size, sometimes by data bus width. But I've never heard of a CPU bitness defined by address bus size.
- deleted 1y ago[deleted]
- drob518 1y agoYea, I was thinking about the address width, but I guess it’s really an 8-bit accumulator width. LOL, and I used to hack 6502 assembly language when I was a kid. As I get older, I’m starting to understand the term “senior moment.”
- pjc50 1y agoM68k is probably the best choice for that. Not because of the architecture but because it was so widely used.