jetzer@studsys.mu.edu (jetzer) (03/07/89)
I would like to modify an Apple //e for use with a handicapped child. She is able to type letters on the keyboard, but is too "slow," and holds the keys down long enough for the auto-repeat to kick in, and many letters then are registered. As you might expect, the learning games do not like this. I attempted to make a modification. Page 164 of the Reference Manual (For //e Only), says, in reference to the keyboard "The scanning rate is set by the external resistor-capacitor network made up of C70 and R32." I increased the value of the resistor, but in doing so not all keypresses registered, and the repeat rate was not reduced. What I need, then, is a method of greatly increasing the amount of time before the auto-repeat kicks in (about 10 seconds would be sufficient), or totally eliminating the repeat. It would better if a modification were easily reversed (i.e., if a different capacitor were needed, being able to run it through a double-throw switch so that either the normal or regular repeat rate were selectable). I am comfortable with soldering, removing/adding components, etc., on the motherboard, so this is no problem. I seem to recall that it is possible to change the repeat rate on a ][+ by changing the value of a capacitor. Is there a similar modification for the //e? (I tried posting this some time back, but got no responses. I think we were having problems posting news at that time. Sorry if anyone has seen this before.) -- Mike Jetzer "Hack first, ask questions later."