DECISION PCI bus multi-8255/8254 adapter OPERATION MANUAL
PCI bus multi-8255/8254 adapter is a programmable I/O interface for PC/486, Pentium or compatible computers. It has 32 bits PCI bus and Plug and Play (PnP) features. 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.
