Modifies stack for entry to procedure for high level language.
Operand “locals” specifies the amount of storage to be allocated on the stack.
“Level” specifies the nesting level of the routine.
Paired with the LEAVE instruction, this is an efficient method of entry and exit to procedures.
Usage:
ENTER locals,level ;
Modifies flags:
none
| Clocks | Size | |||||
|---|---|---|---|---|---|---|
| Operands | 808x | 286 | 386 | 486 | Bytes | |
| immed16,0 | - | 11 | 10 | 14 | 4 | |
| immed16,1 | - | 15 | 12 | 17 | 4 | |
| immed16,immed8 | - | 12+4(n-1) | 15+4(n-1) | 17+3n | 4 | |