PIN SIGNAL DESCRIPTION
1 N.C. (-12 VDC on CoCo 1 and 2)
2 N.C. (+12 VDC on CoCo 1 and 2)
3 HALT* Halt input to the CPU
4 NMI* Non-Maskable Interrupt to the CPU
5 RESET* Main Reset and Power-up Clear
6 E CLOCK Main CPU Clock
7 Q CLOCK Clock which leads E by 90 degrees
8 CART* ROM PAK Detection Interrupt
9 +5 VDC +5 Volts DC (300 mA)
10 DATA 0 CPU Data Bus - Bit 0
11 DATA 1 CPU Data Bus - Bit 1
12 DATA 2 CPU Data Bus - Bit 2
13 DATA 3 CPU Data Bus - Bit 3
14 DATA 4 CPU Data Bus - Bit 4
15 DATA 5 CPU Data Bus - Bit 5
16 DATA 6 CPU Data Bus - Bit 6
17 DATA 7 CPU Data Bus - Bit 7
18 R/W* CPU Read/Write Signal
19 ADDR 0 CPU Address Bus - Bit 0 0
20 ADDR 1 CPU Address Bus - Bit 1 1
21 ADDR 2 CPU Address Bus - Bit 2 2
22 ADDR 3 CPU Address Bus - Bit 3 3
23 ADDR 4 CPU Address Bus - Bit 4 4
24 ADDR 5 CPU Address Bus - Bit 5 5
25 ADDR 6 CPU Address Bus - Bit 6 6
26 ADDR 7 CPU Address Bus - Bit 7 7
27 ADDR 8 CPU Address Bus - Bit 8 0
28 ADDR 9 CPU Address Bus - Bit 9 1
29 ADDR 10 CPU Address Bus - Bit 10 2
30 ADDR 11 CPU Address Bus - Bit 11 3
31 ADDR 12 CPU Address Bus - Bit 12 4
37 ADDR 13 CPU Address Bus - Bit 13 5
38 ADDR 14 CPU Address Bus - Bit 14 6
39 ADDR 15 CPU Address Bus - Bit 15 7
32 CTS* Cartridge (ROM) Select Signal
33 GROUND Signal Ground
34 GROUND Signal Ground
35 SND Cartridge Sound Input
36 SCS* Spare Cartridge (DISK) Select Signal
