Viglen VIG610M Manual page 11

LS-120 Support
LS-120 MB Diskette technology enables you to store 120MB of data on a single, 3.5"
removable diskette. LS-120 technology is backward (both read and write) compatible
with 1.44MB and 720KB DOS-formatted diskette and is supported by Windows 95
and Windows NT operating system.
The Vig610m board allows connection of an LS-120 compatible drive and a standard
3½" floppy drive. The LS-120 drive can be configured as a boot device before a
floppy drive, if selected in the BIOS setup utility.
NOTE: If you connect an LS-120 drive to an IDE connector and configure it as the
"A" drive and configure a standard 3.5" floppy as "B" drive, the standard floppy must
be connected to the floppy drive cable's "A" connector (the connector at the end of
the cable).
The BIOS setup utility can be configured to boot firstly from either the LS120 or
standard 3½" floppy drive.
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 multi-century 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.
An external coin-cell (CR 2032) battery powers the real-time clock and CMOS
memory. When the computer is not plugged into a wall socket, the battery has an
estimated life of three years. When the computer is plugged in, the 3.3-V standby
current from the power supply extends the life of the battery. The clock is accurate
to  13 minutes/year at 25 ºC with 3.3 V applied.
I/O Interface Controller
The motherboard uses the I/O controller which features:
 Serial ports:
o Internal send/receive 16-byte FIFO buffer.
o Four internal 8-bit DMA options for the UART with SIR support (USI).
 Multimode bidirectional parallel port:
o Standard mode, IBM and Centronics compatible.
o Enhanced parallel port (EPP) mode with BIOS and driver support.
o High-speed extended capabilities port (ECP) mode.
 Floppy disk controller:
o N82077 compatible.
o Single diskette drive interface.
o 16-byte FIFO.
o High-performance digital data separator (DDS).
o PC-AT and PS/2 drive-mode support.
V1.0 VIG610M Motherboard Manual
10