>The Atari 2600's joystick ports allegedly have a means for output that
>NOBODY EVER, EVER, EVER USED.
Actually the 2600 kepad controllers used the joystick ports as outputs.
The keypad use a scanning matrix, the 4 stick signals where programmed as
outputs and used to select the row to scan, and the coloumns where read
through the paddle inputs and trigger. I assume a similar scheme was used
for some of the 2600 keyboard add-ons that where made but I have never gotten
a chance to take one of these apart to see.
Dan Boris
--
To unsubscribe, send the word UNSUBSCRIBE in the body of a message to
stella-request@xxxxxxxxxxx
