MODEL
PET
VIC20
C64
SX-64
C64C
C16
Plus/Four  
C128/D
A1000
A500
A500+
A2000
A600
A1200
A3000
A4000

INTRO
4/1977
6/1980
1/1982
1/1983
6/1986
6/1984
6/1984  
1985
7/1985
2/1987
?
1987
199?
1992
?
1992

CPU
6502
6502
6510
6510
6510/8500
1750/8501  
8501
8510+Z80
68000
68000
68000
68000
68000(SM)
68020(SM)
68030
68040 

CLOCK
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
1 MHz
1/2/10 MHz  
7.16 MHz
7.16 MHz
7.16 MHz
7.16 MHz
7.16 MHz
15 MHz
16/25 MHz
25MHz

BASIC RAM  
5k ?
5k
64k
64k
64k
16k
64k
128k
256k
512k
1Mb
1Mb
1Mb
2Mb

MAX RAM  
?
?
?
?
?
?
?
640k
9Mb
9Mb
9Mb
9Mb
9Mb
9Mb
18Mb

SERIAL PORT
?
CBM Serial
CBM Serial
CBM Serial
CBM Serial
CBM Serial  
CBM Serial
CBM Serial
RS232
RS232
RS232
RS232
RS232
RS232
RS232
RS232

PARALLEL
?
No
No
No
No
No
No
No        
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes

MODULATOR
?
External
Internal
External
Internal
Internal   
Internal
Internal
?
External
External
External
Internal
Internal
Internal
Internal

COMP-VIDEO  
?
Colour
Colour
Colour
Colour
Colour
Colour
Colour
Colour
Mono
Mono
Mono
Colour
Colour
Colour
Colour

RGB       
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Digital
Analog/Digital 
Analog/Digital
Analog/Digital
Analog/Digital
Analog/Digital
Analog/Digital
Analog/Digital
Analog/Digital

MAX-COLOURS  
Mono
16
16
16
16
16
16
16
4096
4096
4096
4096
4096
4096
4096
16 bit

COLUMNS  
40? 80
22
40
40
40
40
40
40/80
60/80
60/80
60/80    
60/80
60/80
60/80
60/80
60/80

SOUND
?
MONO 3 CH
MONO 3 CH
MONO 3 CH
MONO 3 CH
MONO 3 CH
MONO 3 CH
MONO 3 CH
STEREO 4 CH
STEREO 4 CH
STEREO 4 CH   
STEREO 4 CH
STEREO 4 CH
STEREO 4 CH
STEREO 4 CH
STEREO 4 CH

BASIC Version 
2.0
2.0
2.0
2.0
2.0
3.5
3.5
7.0
AMIGA
AMIGA
AMIGA
AMIGA
AMIGA
AMIGA
AMIGA
AMIGA

ADDITIONAL INFORMATION
?
Two main versions.  Earlier one has only two pins on power pack lead to computer.
?
Built-in colour screen and disk drive.  DX-64 is dual drive version.
?
?
Has unusual cursor controls.  Built-in W/processor, database, spreadsheet in ROM.
?
WARNING: Has non-standard parallel port - +5V on one pin.