8
All of the even numbered pins are on row closest to the top edge of the circuit board
while all the odd numbered pins are on the other row.
Pin
Use
Pin
Use
1
PA0
2
PB0
3
PA1
4
PB1
5
PA2
6
PB2
7
PA3
8
PB3
9
PA4
10
PB4
11
PA5
12
PB5
13
PA6
15
PA7
17
PB6
18
PB7
23
+8 volts
24
+8 volts
25
Ground
26
Ground
Any pins not in the chart above are not connected to any signals on the KIM Clone
board. The +8 supply lines are most likely 8 volts, but whatever power level is
applied to J1 and then run through the 1N4001 diode at D2. While we haven’t rated
exactly how much power can be drawn from these pins, it is meant to be enough to
power a typical microcontroller such as an Arduino.
The pin usage might seem odd but they were arranged this way to agree with the SD
Card System, which was based on pin mappings used on the Corsham Technologies
SS-30 parallel card.
JP5 – 8K ENABLE
These jumpers control whether an address in that particular 8K address space will
be mapped to the on-board RAM The four jumpers and their corresponding address
rages are: