blob: f284c7d2ea05d5f543188eabad1946a4b66a0f1b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
**************************************************************************
* Parameter Declearation Section
*
* Export Symbols
xdef pgstart ; export 'pgstart' symbol
absentry pgstart ; for assembly entry point
* Symbols and Macros
PORTA equ $0000 ; i/o port A addresses
DDRA equ $0002 ; data direction register for PORTA
PORTB equ $0001 ; i/o port B addresses
DDRB equ $0003 ; data direction register for PORTB
**************************************************************************
* Data Section: address used [ $3000 to $30FF ] RAM Memory
*
org $3000 ; Reserved RAM memory starting address
; for Data for CMPEN 472 class
num dc.b 0
*
**************************************************************************
* Program Section: address used [ $3100 to $3FFF ] RAM Memory
*
org $3100 ; Program start address, in RAM
pgstart ldaa #70
ldab #60
aba
nop
ldaa #60
ldab #-70
aba
nop
ldaa #-60
ldab #-70
sba
nop
ldaa #70
ldab #-60
sba
nop
ldab num
dly ldaa num
loop deca
bne loop
*
**************************************************************************
done
|
