Introduction
1
Introduction
This Installation Guide covers the installation and configuration of the PC/Xi,
PC/16e, MC/Xi and COM/Xi serial communications boards for ISA and Micro
Channel computers.
PC/Xi Boards
PC/Xi boards are available with eight or sixteen ports, and 128K, 256K or 512K
of dual-ported memory (128K is standard). The PC/Xi board is controlled by a
12.5 MHz 80C186 microprocessor (a 16 MHz version is available as an option).
The PC/Xi board is actually two boards, the PC/Xi Processor, and an I/O Mate
that plug together to form a unit which occupies a single 16-bit slot (see Figure
1 on page 8). The Processor board (or “motherboard”) is common to all versions
of the PC/Xi, and contains the 80C186 microprocessor and 128K of dual-ported
RAM (as an option, this can be expanded to 256K or 512K). The I/O mate (or
“daughter card”) contains the actual interfacing hardware (communications
chips, line drivers and receivers, connectors, etc) which is unique to the various
PC/Xi configurations.
PC/Xi boards are available with I/O Mates to support eight or sixteen RS-232
asynchronous serial ports. The PC/16i is also available with an RS-422
interface. The PC/Xi+ board features an optional synchronous port in addition
to the asynchronous ports (see page 62 for information about the synchronous
port).
