; showme.txt
; (c)1996/97 Markus Hahn

; This program shows some basic
; functionalities of the
; instructions available in AsmSim.

; You can start every part by
; setting the PC to the right
; address (just click on the
; entry in the memory window).
; You should clear the memory
; first before compiling these
; lines!


; example #1: very simple program
0: STOP

; example #2: NOP does nothing and
; a value can't be executed
5: NOP
6: 123

; example #3: aritmetic demo
10: move #12, a
11: move a, b
12: add a, b
13: sub #33, a
14: jo 16
; this stop will never be reached
15: stop
16: move #555, f
17: mul b, f
18: move #3, g
19: div g, f
; create a "division by zero" execption
20: sub a, a
21: div a, b

; example #4: pointer and jump demo

; fill a memory array with numbers
; from 22 to 33 (step by 3)
30: move #40, f
31: move #22, a
32: move a, [f]
33: inc f
34: add #3, a
35: cmp #33, a
36: jb 32
37: stop

; example #5: stack demo

50: move #666, a
51: push a
52: sub a, a
53: pop a
54: call 60
; simulate a call to the same
; subroutine at address 60
55: move #59, [s]
56: dec s
57: move #55667788, a
58: jmp 60
59: stop

; the subroutine 
60: sub a, a
61: ret