The Amplicon’s PCIe-236 card is a 24 digital input/output (DIO) card designed for industrial applications. The PCIe-236 emulate a single 82C55 Programmable Peripheral Interface (PPI) chip which can be configured by user software to operate in a variety of modes with two 82C54 counter timers (CTCs) chips which occupy clusters Z1 & Z2. The board is suitable for use in any PC that supports PCIe Bus version 2.1.
The digital I/O facility of the PCIe-236 provides all 24 lines on three 8 bit ports, labeled DIO Port A0 - A7, DIO Port B0 - B7 and DIO Port C0 - C7. These ports are further divided into two groups of 12 bits each, group A comprising the 8 bits of port A and the high order 4 bits of port C, and Group B comprising the 8 bits of port B and the low order 4 bits of port C.