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APPENDIX C

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CONNECTORS/PORTS FOR PERIPHERAL EQUIPMENT

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Side Panel Connections, Control Port 1, Control Port 2, Rear Connections, Cartridge Expansion Slot, Cassette Port, Serial I/O Port, Audio/Composite Video Connector, 80 Column RGBI Connector, User I/O Port

C.1 Side Panel Connections

1. Power Socket - The five pin square plug from the power supply is connected here.

2. Power Switch - Turns on power from the power supply.

3. Reset Button - Resets computer (warm start).

4. Controller Ports - There are two Controller ports, numbered 1 and 2. Each Controller port can accept a joystick or game controller paddle. The light pen can be plugged only into port 1, the port closest to the front of the computer. Use the ports as instructed with the software.

C.1.1 Control Port 1

Pin Type Note
1 JOYA0
2JOYA1
3JOYA2
4JOYA3
5POT AY
6BUTTON A/LP
7+5VMAX. 50mA
8GND
9POT AX

C.1.2 Control Port 2

Pin Type Note
1 JOYB0
2 JOYB1
3 JOYB2
4 JOYB3
5 POT BY
6 BUTTON B
7 +5V MAX. 50mA
8 GND
9 POT BX

C.2 Rear Connections

5. Expansion Port - This rectangular slot is a parallel port that accepts programs or game cartridges as well as special interfaces.

C.2.1 Cartridge Expansion Slot

Pin Type Pin Type Pin Type Pin Type
1 GND 12 BA A GND N A9
2 +5V 13 /DMA B /ROMH P A8
3 +5V 14 D7 C /RESET R A7
4 /IRQ 15 D6 D /NMI S A6
5 R/W 16 D5 E 02 T A5
6 Dot Clock 17 D4 F A15 U A4
7 I/O1 18 D3 H A14 V A3
8 /GAME 19 D2 J A13 W A2
9 /EXROM 20 D1 K A12 X A1
10 I/O2 21 D0 L A11 Y A0
11 /ROML 22 GND M A10 Z GND

6. A 1530 Datassette recorder can be attached here to store programs and information.

C.2.2 Cassette Port

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.

C.2.3 Serial I/O Port

Pin Type
1 /SERIAL SRQ IN
2 GND
3 SERIAL ATN 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.

8. 40 Column Video Connector - This DIN connector provides audio and composite video signals which can be directly connected to suitable audio and monitor equipment. These signals can be connected to the Commodore monitor or used with separate components.

C.2.4 Audio/Composite Video Connector

Pin Type
1 LUMINANCE/SYNC
2 GND
3 AUDIO OUT
4 VIDEO OUT
5 AUDIO IN
6 CHROMINANCE
7 NC
8 NC

9. RF Connector - This connector supplies both picture and sound to your television set. (A television can display only a 40 column picture.)

10. 80 Column RGBI Connector - This 9-pin connector supplies an RGBI (Red/Green/Blue/Intensity) signal.

C.2.5 80 Column RGBI Connector

Pin Signal
1 Ground
2 Ground
3 Red
4 Green
5 Blue
6 Intensity
7 Monochrome
8 Horizontal Sync
9 Vertical Sync

11. User Port - Various interface devices can be attached here.

C.2.6 User I/O Port

Pin Type Note Pin Type
1 GND A GND
2 +5V MAX. 100 mA B /FLAG2
3 /RESET C PB0
4 CNT1 D PB1
5 SP1 E PB2
6 CNT2 F PB3
7 SP2 H PB4
8 /PC2 I PB5
9 SER. ATN OUT K PB6
10 9 VAC MAX. 100 mA L PB7
11 9 VAC MAX. 100 mA M PA2
12 GND N GND

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