Product Reference
2–75
Date and Time
The time shown on the first SETUP screen is continuously updated and reflects the current state of
the hardware real-time clock. The new ti me an d da te en tere d i s imme dia tely w ritte n to the dev ice.
Enter the date in the form mm/dd/yyyy. The year requires al l 4 dig its . Ente r the time in 2 4-ho ur
format, in the form hh:mm:ss.
The ROM BIOS maintains the system real-time clock. It is incremented approximately 18.2 times
per second by an interrupt from timer/counter 0. The ROM BIOS automatically initializes the
system real-time clock from the hardware real-time clock upon system reset or power up. The
accuracy of the hardware real-time clock depends on connecting a battery to the appropriate
terminals on J5, the Utility connector. If a battery is not attached, the system time information
does not remain accurate after a power cycle.
Floppy Drives
The ROM BIOS supports all of the popular DOS-compatible floppy disk formats. This includes all
the 5-1/4 inch and 3-1/2 inch floppy formats—360K, 720K, 1.2 M, and 1.44 M by te. Th e RO M BIO S
also supports dual-capacity use of high density floppy drives, systems can be read and booted from
360K floppies in a 1.2M 5-1/4 inch drive, and from 720K f loppie s in a 1.4 4M 3-1/2 inch drive .

Drive Parameter Setup

Enter the number and type of floppy drives in the system. If the drives connected to the system do
not match the parameters in the configuration memory, POST displays an error message. To
eliminate the error message, set the drive parameters to match your floppy drives.
IDE Hard Disk Drives
The ROM BIOS supports one or two hard disk drives connected to the IDE interface. The IDE
SETUP parameters are used for setting the physical parameters of the drives you install in your
system. Physical drives can have one or more logical partitions. Up to eight logical drives or drive
partitions can be installed but only two physical dr ive s can be used . Older v ersio ns of D OS m ay
limit the number of logical drives that can be insta lled .
No parameters are displayed for Auto detect hard disk. All IDE/ATA drives should be configured
for Auto. Manual entries are for legacy use only to sup port Weste rn Digit al an d sim ilar MFM A T
bus controllers.