VT82C42 - Keyboard Controller
The internal timer counting is based on an 8Mhz clock input from X1, X2 ( or X2, with X1 connected to ground).
After the deassertion of RESET#, the VT82C42 will drive high at pin P23 and pin P27.
After 6 µs (6 x 8 clocks) of driving, the VT82C42 will check on pins T1 & P10; if both pins are low, th
VT82C42 KEYBOARD CONTROLLER Preliminary Release DATE : November 22, 1995 VIA TECHNOLOGIES, INC.
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