Fairlight Merlin - A3 General Purpose Interface

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A3 GENERAL PURPOSE INTERFACE
Connector 37 Pin D Male
Input TTL (1 LS Load)
Output/Bank TTL (max 5 TTL loads)
GPIO
1GND
2GPIO6
3GPIO5
4GND
5 GPIOBO2
6 GPIOBO1
7GND
8 GPIOIN6
9 GPIOIN5
10 GN D
11 GP IO IN 2
12 GPIO IN1
13 GN D
14 GPIOOUT6
15 GPIOOUT5
16 GN D
17 GPIOOUT2
18 GPIOOUT1
19 GN D
20 GPI0B07
21 GN D
22 GPI
23 GPIO BO 3
24 GN D
25 GPIO BO 0
26 GPIO IN7
27 GN D
28 GPIO IN4
29 GPIO IN3
30 GN D
31 GPIO INO
32 GPIOOUT7
33 GN D
34 GPIOOUT4
35 GPIOOUT3
36 GN D
37 GPIOOUT0