The Open Boot PROM uses the Forth programming language. Forth is a stack-based language. Arguments must be pushed on the stack before running the correct command (called a word), and the result is left on the stack.
To place a number on the stack, type its value.
ok 57 ok 68 |
To add the two top values on the stack, use the + operator.
ok + |
The result remains on the stack. The stack is shown with the .s word.
ok .s bf |
The default base is hexadecimal. The hex and decimal words can be used to switch bases.
ok decimal ok .s 191 |
See the Forth User's Guide for more information.