References/notes: DOES> compilation semantics: https://github.com/mgcaret/of816/blob/master/asm/forth-dictionary.s#L5835-L5848
DOES> execution semantics: https://github.com/mgcaret/of816/blob/master/asm/forth-dictionary.s#L5797-L5831
JSL = jump to subroutine long, leaves a 24-bit return address on the return stack
Execution semantics for some words have headers omitted in OF816 to save memory. SEE replaces the name with ^address.
Each word starts with machine code. All secondaries start with a JSL opcode (0x22)