Intel Desktop Board D850GB Technical Product Specification
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1.7 I/O Controller
The SMSC LPC47M102 I/O controller provides the following features:
• 3.3 V operation
• One serial port
• One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
• Serial IRQ interface compatible with serialized IRQ support for PCI systems
• PS/2-style mouse and keyboard interfaces
• Interface for one 1.2 MB or 1.44 MB diskette drive
• Intelligent power management, including a programmable wake up event interface
• PCI power management support
• One fan tachometer input
The BIOS Setup program provides configuration options for the I/O controller.
For information about Refer to
SMSC LPC47M102 I/O controller http://www.smsc.com
1.7.1 Serial Port
The D850GB board has one serial port connector on the back panel. The serial port’s NS16C550-
compatible UART supports data transfers at speeds up to 115.2 kbits/sec with BIOS support. The
serial port can be assigned as COM1 (3F8h), COM2 (2F8h), COM3 (3E8h), or COM4 (2E8h).
For information about Refer to
The location of the serial port connector Figure 8, page 50
The signal names of the serial port connector Table 20, page 52
1.7.2 Parallel Port
The connector for the multimode bidirectional parallel port is a 25-pin D-Sub connector located on
the back panel. In the BIOS Setup program, the parallel port can be configured for the following:
• Output only (PC AT
†
-compatible mode)
• Bi-directional (PS/2 compatible)
• EPP
• ECP
For information about Refer to
The location of the parallel port connector Figure 8, page 50
The signal names of the parallel port connector Table 19, page 51