SICPelago is a randomized Scheme environment where you unlock core capabilities by solving carefully selected exercises adapted from Structure and Interpretation of Computer Programs. Starting only with your trusty lambda and the supporting quote, climb your way to the top of the textbook, exploring math puzzles, composite data structures, and infinite sequences. Happy April Prototypes Day!
SICPelago
ROSE-8 in customasm
Last week a friend shared the existence of hlorenzi’s customasm, a tool that can serve as the assembler for arbitrary CPU architectures just by defining a mapping of instructions to encodings.
Hey, I made a CPU once! How hard would it be to make a customasm definition for ROSE-8? Turns out…not very! I played around with it for about two hours, and by the end of it I’d translated an entire ROSE-8 program to customasm, with most of the definition file looking basically the same as the text reference for the ISA encoding.
The Shell is a Program
I have a friend who switched to Linux because they didn’t want to pay for a new license for Windows and thereby end up running modern Windows. They’re not very computer-minded, so troubleshooting doesn’t come naturally, and anything that requires dropping down to the command line is something that has to be done by rote. And on one occasion, when I asked them to run something, they asked where to type it in.
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