SOYO SY-6BA+ IV user manual 10 I/O Interface Controller, Real-Time Clock, Cmos SRAM, and Battery

Motherboard Description SY-6BA+ IV

recognize it as both the A and B drive

1-9.6 Real-Time Clock, CMOS SRAM, and Battery

The real- time clock is compatible with DS1287 and MC146818 components. The clock provides a time- of- day clock and a multicentury calendar with alarm features and century rollover. The real- time clock supports 256 bytes of battery- backed CMOS SRAM in two banks that are reserved for BIOS use.

The time, date, and CMOS values can be specified in the Setup program. The CMOS values can be returned to their defaults by using the Setup program.

1-10 I/O INTERFACE CONTROLLER

The motherboard uses the ITE 8671 super I/ O controller which features:

lSingle diskette drive interface

lIS A Plug- and- Play compatible register set

lTwo serial ports

lFIFO supports on both serial and diskette interfaces

lOne parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port (EPP) support

lPS/ 2 style mouse and keyboard interfaces

lPCI P ME interface

lVialigent auto power management, including:

ØShadowed write- only registers for ACPI compliance

ØProgrammable wake- up event interface

The Setup program provides configuration option for the I/ O controller.

1-10.1 Serial Ports

The NS16C5450- compatible UARTs support data transfers at speeds up to 115.2 Kbits/ sec with BIOS support.

1-10.2 Parallel Port

In the Setup program, there are four options for parallel port operation:

lCompatible (standard mode)

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