NEC POWERMATE 2000, Service And Reference Manual

Page: 112 / 183

System Board 4-13
Parallel Port Addresses
Starting I/O Address Port
378 LPT1
278 LPT2
228 LPT3
378 LPT1
278 LPT2
228 LPT3
Parallel interface signals are output through the system board’s 25-pin,
D-subconnector. The connector is located at the back of the system unit.
Serial Interface
The system has one 16C550 UART compatible serial port (COM1) integrated
on the I/O controller. The serial port supports the standard RS-232C interface.
The buffered high-speed serial port supports transfer rates up to 115.2 KB. The
port allows the installation of high-speed serial devices for faster data transfer
rates.
The I/O addresses for the channel are given in the following table (see Section
2, “System Configuration,” for interrupt levels). Soft-selectable base addresses
are 3F8h, 2F8h, 3E8h, and 2E8h.
Serial Port I/O Addresses
Starting I/O Address Port
3F8 COM1
2F8 COM2
3E8 COM3
2E8 COM4
See Section 2, “System Configuration,” for information on resetting the port
through the BIOS Setup utility. See Section 9, “Specifications,” for the serial
interface specifications.
Serial interface signals are output through the system board’s 9-pin,
D-subconnector. The connector is located at the back of the system unit.