Appendix 4. The pin assignment of the connectors

The pin assignment of the expansion connector

For practical reasons the connector has been rotated 90°. The a-connections are the ones closest to the board. Seen from the side therefore the numbers will run from right to left. The blocks above 32c and below 10 indicate the polarizing notches enabling the male plug to be connected correctly.

Pin Function Row Function
a c
32 0V o o 0V
31 RAM-R/!W o o NC
30 Φ1 o o !EX
29 K1 o o R/!W
28 NC o o K2
27 Φ2 o o NC
26 A1 o o A0
25 A3 o o A2
24 A5 o o A4
23 A7 o o A6
22 A9 o o A8
21 A11 o o A10
20 A13 o o A12
19 A15 o o A14
18 -5V o o K3
17 K4 o o +12V
16 o o
15 K5 o o K6
14 K7 o o SO
13 NC o o NC
12 !IRQ o o !NMI
11 NC o o NC
10 D7 o o D6
9 D5 o o D4
8 D3 o o D2
7 D1 o o D0
6 NC o o NC
5 !RES o o !RDY
4 0V o o 0V
3 NC o o NC
2 NC o o NC
1 +5V o o +5V

The pin assignment of the port connector

			o	31	NC
NC	30	o
			o	29	NC
NC	28	o
			o	27	NC
PB3	26	o
			o	25	PB2
PB1	24	o
			o	23	PB0
PB7	22	o
			o	21	PB6
PB5	20	o
			o	19	PB4
NC	18	o
			o	17	+5V
ΝC	16	o
			o	15	NC
NC	14	o
			o	13	NC
NC	12	o
			o	11	NC
РА7	10	o
			o	9	PA6
PA5	8	o
			o	7	PA4
РАЗ	6	o
			o	5	PA2
ΡΑ1	4	o
			o	3	PA0
+5V	2	o
			o	1	0V