Operations Manual
PCI bus multi-8255/8254 adapter
CHAPTER 1
INTRODUCTION
INTRODUCTION
The PCI bus multi-8255/8254 adapter is a 32 bits PCI bus
adapter with Plug and Play (PnP) features, it is a programmable
I/O interface for PC/486, Pentium or compatible computers.
The PnP features let hardware configuration for IRQ and I/O
address is detected by BIOS automatically, you don’t need set
switch and jumper.
The PCI bus multi-8255/8254 adapter provides total 24 digital
I/O ports, each I/O port contains 8 I/O lines, and can be set
either input or output by the user’s program. Two 8254 on
board chips provides six programmable interval timer/counter.
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