Motherboard Description
SY-7ISA
14
1-6.9 Real-Time Clock
The real-time clock supports 256 bytes of battery-backed CMOS SRAM.
Hardware implementation to indicate century rollover.
1-7
I/O INTERFACE CONTROLLER
The motherboard uses the ITE IT8712F-A I/O controller which features:
l
Single diskette drive interface
l
Two serial ports
l
FIFO supports on both serial and diskette interfaces
l
One parallel port with Extended Capabilities Port (ECP) and
Enhanced Parallel Port (EPP) support
l
PS/2 style mouse and keyboard interfaces
l
PCI PME interface
l
Intelligent auto power management, including:
Ø
Shadowed write-only registers for ACPI compliance
Ø
Programmable wake-up event interface
The Setup program provides configuration option for the I/O controller.
1-7.1 Serial Ports
The motherboard has one 9-pin D-Sub serial port connector located on the
back panel. The NS16C5450-compatible UARTs support data transfers at
speeds up to 115.2 Kbits/sec with BIOS support.
1-7.2 Parallel Port
The connector for the multimode bi-directional parallel port is a 25-pin D-
Sub connector located on the back panel of the motherboard. In the Setup
program, there are four options for parallel port operation:
l
Compatible (standard mode)
l
Bi-directional (PS/2 compatible)
l
Bi-directional EPP. A driver from the peripheral manufacturer is
required for operation. See Section 6.2 for EPP compatibility.
l
Bi-directional high-speed ECP
1-7.3 Diskette Drive Controller
The I/O controller is software compatible with the 82077 diskette drive
controller and supports both PC-AT and PS/2 modes. In the Setup
