I/O Controller
The FDC37B807 I/O controller from SMSC is an ISA Plug and Play-compatible, multifunctional I/O device that provides the following features (see Chapter 13 in the Intel ISP1100 Internet Server Technical Product Specification for Plug and Play specification information):
∙Two serial ports.
∙Interface for one 1.2 MB, 1.44 MB, or 2.88 MB diskette drive.
∙Three-mode diskette drive support (driver required).
∙FIFO support on both serial and diskette drive interfaces.
∙One parallel port with extended capabilities port (ECP) and enhanced parallel port (EPP) support.
∙PS/2-style mouse and keyboard interfaces.
∙Support for serial IRQ packet protocol.
∙Intelligent power management, including:
⎯Shadowed write-only registers for ACPI compliance.
⎯Programmable wake up event interface.
The BIOS Setup program provides configuration options for the I/O controller.
Serial Ports
The server board has two 9-pin D-Sub serial port connectors; one on the back panel and one on the front panel under the bezel. The front-panel serial port is connected in parallel with the serial port
BD-Sub connector located on the back panel. The serial port NS16C550-compatible UARTs support data transfers at speeds up to 115.2 Kbits/sec with BIOS support. The serial ports can be assigned as COM1 (3F8h), COM2 (2F8h), and COM3 (3E8h).
Diskette Drive Controller
The I/O controller supports a single diskette drive that is compatible with the 82077-diskette drive controller and supports both PC-AT†and PS/2 modes. In the Setup program, the diskette driver interface can be configured for the following capacities and sizes:
∙360 KB, 5.25-inch
∙1.2 MB, 5.25-inch
∙720 KB, 3.5-inch
∙1.2 MB, 3.5-inch (driver required)
∙1.25/1.44 MB, 3.5-inch
∙2.88 MB, 3.5-inch
NOTE
The I/O controller supports 1.2 MB, 3.5-inch diskette drives, but a special driver is required (three-mode).
