Mica — a little virtual machine

Editor

⌘↩ run F10 step esc pause ⇧F5 reset · click a line number to set a breakpoint

⌘↩ execute · HELP lists every command

assembly blocks run on the CPU at the live clock · registers & RAM persist between blocks

Machine

RAM 1024 cells · click a cell, or focus the grid and use the arrow keys · the stack grows down from 0x3FF

Now executing—

idle

Instruction set click an op to read or patch its code — Apply live-patches the CPU

TTY0I/O

↩

Manual33 ops

CPU R1–R4, PC, SPFlags ZF, SFRAM 1024 cells · 0x000–0x3FFStack grows down from 0x3FFCall ABI args R1/R2 · return R1