Controller Jack Interface - Atari 130XE Service Manual

Command Frame
The serial bus protocol provides for three types of commands:
1) Data Send
2) Data Receive
3) Immediate (No Data-Command Only)
PIN
1 Clock In
2 Clock Out
3 Data Into CPU
4 GND
5 Data Out
6 GND
13 Interrupt
Figure 1-12. SIO Interface Pin Assignments (looking into jack on unit)

Controller Jack Interface

The 130XE provides two controller jack interfaces. Both are functionally and electrically
identical. The controller jacks are 9-pin D-type connectors.
1. (Joystick) Forward Input
2. (Joystick) Back Input
3. (Joystick) Left Input
4. (Joystick) Right Input
5. Pot B Input
Figure 1-13. Controller Jack Pin Assignments (from right side of 130XE)
130XE Personal Computer
Field Service Manual
PIN
7 Command
8 Motor Control
9 Proceed
10 Ready (Computer ON)
11 Audio In (175 mV)
12 Not used
2 4 6 8 10 12
1 3 5 7 9 11 13
External view
6. Trigger Input
7. +5 volts
8. Ground
9. Pot A Input
1 5
6 9
External view
1-11