Universal Serial Bus - NEC READY ES PRO Manual

The enhanced parallel port supports Enhanced Capabilities Port
(ECP) and Enhanced Parallel Port (EPP) modes for devices that
require ECP or EPP protocols. These protocols allow high-speed
bi-directional transfer over a parallel port and increase parallel port
functionality by supporting more devices.
The buffered high-speed serial port uses a fast 16550 UART. The
UART supports transfer rates up to 19.2 kilobytes per second. This
port allows installation of high-speed devices for faster data transfer
rates.
The two USB ports allow you to add new plug and play serial devices
without opening the system. You simply plug the USB device into the
port. The speed varies between 12 megabits per second (Mbps) for
printers and 1.5 Mbps for mice and keyboards. Up to 127 USB
devices can be connected to your computer.
The combination of the enhanced parallel port, buffered serial port,
and USB ports ensure optimum performance for future peripheral
devices and operating systems.
The keyboard and mouse connectors support a PS/2-compatible
keyboard and mouse.
The controller integrates a real-time clock with Century calendar
functionality and a 242-byte CMOS RAM. A 3-volt lithium battery
backs up the CMOS RAM. The battery is socketed on the system
board and is replaceable.

Universal serial bus

The system board has two USB ports that permit the direct
connection of two USB devices, one to each port. For more than two
devices, external hubs on the devices can be daisy-chained to either
port.
System specifications 89