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.

*Port address selectable.


*8255/8253 I/O card.

*8255/8253 user's manual.

*8255/8253terminator board (option).

*Two expansion flat cables (option).