alt Hacker NewsAs a kid I didn’t understand what the 555 timer chip on the Apple II disk controller was doing but I learned the hard way that when you misalign the pins on the drive connector cable and the 555 chip releases its blue smoke you can’t use the drive anymore :(
Replies
fortran77 • yesterday at 7:28 PM
There was a 556 on the Apple ][ disk controller (a dual 555).
See: https://mirrors.apple2.org.za/Apple%20II%20Documentation%20P...
huflungdung • today at 12:31 AM
[dead]
I have read as well that the 555 was used in the game paddles for the Apple II. 555 + potentiometer (the part you turned) varied the length (duty cycle?) of a square wave which the Apple II used to determine the paddle position.