6. Cassette Port—A 1530 Datassette recorder can be
attached here to store programs and information.
Cassette
Pin
Type
A-1
GND
B-2
+5V
C-3 CASSETTE MOTOR
D-4
CASSETTE READ
E-5
CASSETTE WRITE
F-6
CASSETTE SENSE
7. Serial Port—A Commodore Serial printer or disk
drive can be attached directly to the Commodore
128 through this port.
Serial I/O
Pin
Type
1
SERIAL SRQIN
2
GND
3 SERIAL ATN IN/OUT
4
SERIAL CLK IN/OUT
5
SERIAL DATA IN/OUT
6
RESET
Note: The Commodore Serial Port is not RS-232 compatible.
TTL RS-232 levels can be obtained from the User Port.
C-4