The 8255 I/O card is a programmable peripheral interface for PC/XT or compatible. The interface card contains 8253 chips and 8255 chips, the 8253 chip provides programmable interval timer/counter functions and the 8255 chips provide programmable input/output functions.
The features of the 8255 I/O card are:
*Programmable I/O control functions.
*Up to 48 I/O lines.
*Maximum of 2MHZ count rate.
*Three independent 16 bits counter.
*Support several operating modes, which are Programmable.
*Sixteen LED indicate when I/O is operating.
*8255/8253 I/O card.
*8255/8253 user's manual.
*8255/8253terminator board (option).
*Two expansion flat