Usb Interface - NEC POWERMATE PROFESSIONAL 9000 Service Manual

1-26 Technical Information
Table 1-12 Serial Port 2 Addresses and Interrupts
Starting I/O Address
3F8
2F8
3E8
2E8
3F8
2F8
3E8
2E8
See Section 2, "Setup and Operation," for information on resetting the port through the
BIOS Setup utility.
Serial interface specifications include:
T
Baud rate up to 115.2 KB per second
T
Word length
T
Stop bit
T
Start bit
T
Parity bit
Serial interface signals are output through the system board's 9-pin, D-subconnectors. 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) ports allows new Plug and Play serial devices to be added
without having to open the system. The system board has two USB ports; one USB
peripheral can be connected to each port. For more than two USB devices, connect an
external hub to either port.
USB features include:
T
Self-identifying, hot pluggable peripherals
T
Automatic mapping of function to driver and configuration; the USB determines
system resources for each peripheral and assigns them without user intervention
Interrupt Level
IRQ04
IRQ03
IRQ04
IRQ03
IRQ03
IRQ04
IRQ03
IRQ04
5, 6, 7, or 8 bits
1, 1.5, or 2 bits
1 bit
1 bit (odd parity or even parity).
Port
COM1
COM2
COM3
COM4
COM1
COM2
COM3
COM4