Intel Desktop Board D810EMO/MO810E Technical Product Specification
1.6.3IDE Support
The board has two independent bus-mastering IDE interfaces. These interfaces support:
∙ATAPI devices (such as CD-ROM drives)
∙ATA devices using the transfer modes listed in Table 51 on page 79
The BIOS supports logical block addressing (LBA) and extended cylinder head sector (ECHS) translation modes. The drive reports the transfer rate and translation mode to the BIOS.
The board supports laser servo (LS-120) diskette technology through its IDE interfaces. The LS-120 drive can be configured as a boot device by setting the BIOS Setup program’s Boot menu to one of the following:
∙ARMD-FDD (ATAPI removable media device – floppy disk drive)
∙ARMD-HDD (ATAPI removable media device – hard disk drive)
The board has two IDE interface connectors. The primary IDE connector is a standard 40-pin IDE interface. The secondary IDE connector is a 50-pin Slimline IDE connector, intended for use with devices such as 2.5-inch hard disk drives and mobile CD-ROM drives. The Slimline IDE connector has the standard IDE interface pins but also includes audio and power signals.
For information about
The location of the IDE connectors
The signal names of the primary IDE connector
The signal names of the Slimline secondary IDE connector
BIOS Setup program’s Boot menu
Refer to
Figure 5, page 41
Table 24, page 42
Table 25, page 43
Table 56, page 85
1.6.4Real-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.
A coin-cell 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 VSB applied.
The time, date, and CMOS values can be specified in the BIOS Setup program. The CMOS values can be returned to their defaults by using the BIOS Setup program.
✏NOTE
If the battery and AC power fail, standard defaults, not custom defaults, will be loaded into CMOS RAM at power on.