Commodore Plus 4 - Page 300

288 Machine Language on the Commodore Plus/4
S004
2007
2009
200A
200C
200D
200E
2010
2013
D9
FO
08
DO
18
98
69
8D
00
20
03
P8
20
00
80 CMP
BEQ
INY
BITE
CLC
TYA
ADC
21 STA
BRK
$8020,Y
I200C
#2004
#$20
12100
Examine the next memory location.
If equal, then done.
Increment the index.
If not finished, go back.
Prepare to add.
Copy the index into the accumulator
Add $20.
Store the result in $2100.
Stop processing.
Summary of Instruction Set
Opcodes and Number of Bytes
Addressing Modes (Bytes)
fflmm Abs ZP Ace Imp (,X) (),Y ZP,X AbfX Ab,Y Rel Ind ZPtY
Instr. f2J (3) (2) (I) (I) (2) (2) (2) (3) (3) (2) (3) (2)
Adc
And
Asl
Bcc
Bcs
Beq
Bit
Bmi
Bne
Bpl
Brk
Bvc
Bvs
Clc
Cld
Cli
Clv
Cmp
Cpx
Cpy
Dec
Dex
Dey
Eor
Inc
Inx
Iny
69
29
C9
EO
CO
49
6D
2D
OE
2C
CD
EC
CC
CE
4D
EE
65
25
06 OA
24
C5
E4
C4
C6
45
E6
00
18
D8
58
B8
CA
88
E8
C8
61
21
71
31
41
75
35
16
51 55
F6
7D
3D
IE
79
39
Cl Dl D5 DD D9
D6 DE
5D
FE
59
90
BO
FO
30
DO
10
50
70