Pixie is a 16-bit word-addressable register VM with 7 registers, 16 op codes, and 128 KB of memory, with port-mapped I/O.
Dust is an assembler for the VM.
A program which counts down from 10, outputs numbers, then terminates:
# Countdown from 10
mov r0 10
REPEAT:
out r0 0
sub r0 1
jnz r0 :REPEAT
# Pixie terminates when PC is at 0xFFFF
jnz 1 0xFFFF
Assemble:
dust.py countdown.dust countdown.pixie
Run:
Output:
For a more complex example, check out the Brainfuck interpreter here.
This project serves no practical purposes (see Turing tarpit) and was not thoroughly tested. For more details, check out the wiki.