The Apple II had no built-in mechanism to retain system clock information while the system was off, so to maintain file timestamps, etc. users either needed to manually set the time on every boot or install a clock expansion board such as this…
This manual gives instructions on how to install and use the A/D + D/A board. The A/D + D/A board converts data from analog to digital, as well as from digital to analog; the board is used in conjunction with an Apple II or Apple II Plus…
A mouse is a pointing device that provides input for a computer. The mouse detects when it is moved, and transmits changes in position to the computer. The mouse may determine movement in several ways.
These 1997 mouse pads were used with mechanical roller ball mice. The HP MathLAN computers of the late 1990s used mice that tracked the movements of a ball mounted in the bottom of each device. For consistent response, the balls required…
Dot matrix printers operate by moving a printer head up and down the page (or side to side), and having an ink-soaked cloth ribbon (studded with tiny pins) strike the paper. The pins (guided by a small guide plate) strike the paper in a format to…