GL815E Endura Motherboard Product Manual
Page 18 of 51
2.9.1 Serial Ports
The GL8"5E motherboard supports two "6C550-compatible serial ports that can operate at speeds
of up to ""5.2kbps. Serial port " is located on the rear panel whilst serial port 2 is via a header.
Each port can be assigned as COM" through COM4 via the BIOS Setup utility:-
• I/O address 3F8-3FFh, IRQ4
• I/O address 2F8-2FFh, IRQ3
• I/O address 3E8-3EFh, IRQ4
• I/O address 2E8-2EFh, IRQ3
2.9.2 Parallel Port
The GL8"5E has a 25 way female D-sub parallel port connector located on the rear panel. It
supports the following operating modes, configured via the BIOS Setup utility.
• Standard PC-compatible parallel port
• Bi-directional parallel port
• EPP mode
• ECP mode
The I/O locations can be assigned as follows.
• I/O address 378-37Fh & 778-77Fh, IRQ5 or IRQ7
• I/O address 278-27Fh & 678-67Fh, IRQ5 or IRQ7
2.9.3 Infra-red Support
The GL8"5E motherboard supports an IrDA compliant infra-red interface via the front panel header.
An IR transceiver must be added such as the Hewlett Packard HSDL-320" or the HSDL-36"0
device. The IR port shares the serial port 2 channel and thus the two ports cannot be used
simultaneously. A transfer rate of up to ""5kbps is supported.
2.9.4 Keyboard and Mouse Ports
Two PS/2 style keyboard and mouse ports are provided on the rear panel. The two ports are
interchangeable with the motherboard automatically detecting which peripheral is attached to which
port. Both ports provide a resettable fuse protected +5V supply to the peripheral. In addition, both
the keyboard and mouse ports are accessible internally via 4-way headers.
The keyboard controller is functionally equivalent to the 8042 standard and is located at I/O
addresses 60-64h and uses IRQ". The mouse shares the same controller and uses IRQ"2. The
keyboard controller code is Phoenix version 42i.
2.10 USB Ports
GL8"5E supports four independent USB "." compliant ports via the 2 USB controllers (each with 2
channels) contained within the chipset ICH2. Two channels are provided on the rear panel, a third is
available internally on a 5-way ATAPI-style header and a fourth via the AGP connector. The first
three ports all provide a resettable fuse protected +5V supply to the peripheral. The AGP USB
channel power is provided via the AGP connector and it is the responsibility of the AGP adapter to
protect this supply if required. The table below summarizes the USB channel allocation.
