The 8255 / 8254 laboratory adapter is a programmable peripheral interface for PC/XT, PC/AT, 80386, 80486, Pentium or compatible computer. The interface card contain 8254 chips and 8255 chips, the 8254 chips provide programmable interval timer/counter functions and the 8255 chips provide programmable input/output functions. There are tow types of cards, one contains many plated through-holes at the adapter for laboratory development and another is the typical 8255/8254 adapter.
4 Features of the
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