Technical Information 1-16
I/O addresses and interrupt levels for the two channels are given Table 1-8. The interrupt
level is selectable via Setup to either IRQ3 or IRQ4. Software selectable base addresses are
3F8h, 2F8h, 3E8h, and 2E8h.
NOTE:
Any interrupts used for the built-in
serial ports are not available for ISA parallel
ports.
Table 1-8 Serial Port Addressing and Interrupts
Starting I/O Address
Interrupt Level
Port
3F8h
IRQ04
COM1
2F8h
IRQ03
COM2*
3E8h
IRQ04
COM3
2E8h
IRQ03
COM4
* Used for IrDA data transfer
Note that the COM2 port is factory set for IrDA data transfer and must be reset to
“Standard” for serial port transfers. See Section 2 for information on resetting the port
through the Setup Utility.
Serial interface specifications include:
Baud rate up to 19.2 KB per second
Word length - 5, 6, 7, or 8 bits
Stop bit - 1, 1.5, or 2 bits
Start bit - 1 bit
Parity bit - 1 bit (odd parity or even parity).
Serial interface signals are output through the system board’s 9-pin, D-subconnector. The
connectors are located at the rear of the system unit. Pin locations for the serial interface
connector are shown in Appendix A.
USB Interface
The Universal Serial Bus (USB) port allows you to add new plug and play serial devices
without opening up the system. You simply plug the devices into the port. The USB
determines system resources for each peripheral and assigns them without user intervention.
Up to 127 devices can be daisy chained to a single computer.
Summary of Contents for POWERMATE P2166
Page 217: ...Index 4 ...
