A very basic hobby, real mode operating system that works as a reverse polish notation calculator, somewhat Forth-like, except not turing complete. Will run on real hardware.
| Word | Function |
|---|---|
| Number | Push a 16 bit positive integer onto the stack |
| + | Add top two elements on stack |
| - | Subtract top two elements on stack |
| * | Multiply top two elements on stack |
| div | divide top two elements on stack |
| swap | a b -- b a |
| drop | a -- |
| dup | a -- a a |
| rot | a b c -- b c a |
| over | a b -- a b a |