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11
Keyboard Modifications
These are the modifications that I did on my CT-1024 System
Back Space
The backspace key is not connected to anything. To generate a BS(08)
connect a wire from one pin of the key switch to Y5 (IC1 pin 26). Connect a wire
from the other pin of the key-switch to X3 (IC1 pin 36).
At Sign @
To generate an at sign "@" you can change the function of the letter P
key. Isolate both pins of the P key-switch. Cut the trace going to the left pin
near the switch. Cut the trace for the right pin on both sides of the pin. You
will need jumper the right trace around the switch.
Connect a wire from the left pin of the key-switch to Y9 (IC1 pin 22).
Connect a wire from the other pin of the key-switch to X0 (IC1 pin 39).
When the shift key is held down the P key will send an @.
Underscore
To generate an under score "_" you can change the function of the letter O
key. Isolate both pins of the O key-switch. Cut the trace on the vertical strip
near the switch (between the O and I switch). Cut the trace for the right pin on
both sides of the pin. You will need jumper the right trace around the switch.
Connect a wire from the left pin of the key-switch to Y10 (IC1 pin 21).
Connect a wire from the other pin of the key-switch to X0 (IC1 pin 39).
When the shift key is held down the O key will send a _.
Summary of Contents for ASCII
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