16in1 modification of a 32in1 VCS 2600 card

My 16in1 modification of a 32in1 VCS 2600 card

Here is a schematic of this modification:
16in1-card schematic

You'll need:

1 3pin jumper field (or an On-On switch)
3 wires

Step 1:
On the bottom (soldering) side of the PCB cut the A14 addressline of the PROM-socket coming from the 4024.

Step 2:
Drill 3 holes for the jumper into the PCB near the 6 resistors for the datalines d0-d5 and insert the jumper into these holes.

Step 3:
a) Connect pin 23 of the PROM socket with the center pin of the jumper (or switch).
b) Connect the PCB-junction of the A14 ddressline to one end of the jumper.
c) Connect card slot pad Top8 to the other end of the jumper.

This pictures will help you going through steps 1-3:

Modifications on the bottom side of the PCB

Here is a picture of how it looks if you use a switch inserted in the center hole of the PCB to choose between 2KB and 4KB access:
Switch in the center hole of the PCB
The blue wire connects the switch to pin 23 (A14) of the PROM socket. The two pink wires are the two sources for A14.

Using a jumper field instead of a switch it can look like this:
Jumper instead of switch

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