IPL-II

; IPL-II List Reversal Program
; This program reverses a list using IPL-II list processing operations

START:
    L0 = (A B C D E)     ; Initialize input list
    L1 = NIL             ; Initialize output list to empty

LOOP:
    TEST L0, EMPTY       ; Test if input list is empty
    JUMP-IF-TRUE DONE    ; If empty, we're done

    H0 = HEAD L0         ; Get first element of input list
    L0 = TAIL L0         ; Remove first element from input
    L1 = CONS H0, L1     ; Prepend element to output list

    JUMP LOOP            ; Continue loop

DONE:
    PRINT L1             ; Print reversed list
    HALT                 ; End program