CHAPTER 1
INTRODUCTION

The PCCOM ISA bus 4 port serial adapter provides four asynchronous serial communication ports (RS232), which link the computer and serial peripheral devices such as terminals, modems, serial printers, plotters, ... etc.

The PCCOM ISA bus 4 port adapter is particularly suited to facilitate the connection of terminals (VDUs) in multi-user operating systems. Each board is supplied complete with many kinds of connectors.

The PCCOM ISA bus board may be installed in any IBM PC/AT, PC/386, PC/486, Pentium or hardware compatible systems. To accommodate a variety of operating systems, nine jumper blocks permit maximum flexibility of configuration.  You may select which interrupt (IRQ2 - IRQ15), I/O address, and interrupt vector you desire.

The PCCOM ISA 4 port board can be addressed anywhere within the full range of PC I/O ports and each port address can be set individually as your requirement. The interrupt selectable features also provide individual interrupt selection for each port, so that you can arrange the 4 ports in any combination of interrupt you need.

The PCCOM ISA 4 port board can be used to plug in 8250, 16450, 16550, or 16650 chips, and the PCCOM device driver can detect it automatically. There are two kinds of board can be choose, one is normal speed card that its baud rate up to 115200, another is high speed card that its baud rate up to 460K.