Connector - C64 User Port

24 PIN MALE EDGE (DZM 12 DREH) at the computer.

Pin	Name	Description
1	GND	Ground
2	+5V	+5 VDC (100 mA max)
3	/RESET	Reset, will force a Cold Start. Also a reset output for devices.
4	CNT1	Counter 1, from CIA #1
5	SP1	Serial Port 1, from CIA #1
6	CNT2	Counter 2, from CIA #2
7	SP2	Serial Port 2, from CIA #2
8	/PC2	Handshaking line, from CIA #2
9	ATN	Serial Attention In
10	+9V AC	+9 VAC (+ phase) (100 mA max)
11	+9V AC	+9 VAC (- phase) (100 mA max)
12	GND	Ground

A	GND	Ground
B	/FLAG2	Flag 2
C	PB0	Data 0
D	PB1	Data 1
E	PB2	Data 2
F	PB3	Data 3
H	PB4	Data 4
J	PB5	Data 5
K	PB6	Data 6
L	PB7	Data 7
M	PA2	PA2
N	GND	Ground

Source: HW-Book 2001-06-08
Last modified: 2007-06-27 14:22:56.0
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