IBM 2193 Maintenance Service Manual page 52

Virus Warning
Determines if the BIOS will monitor the boot sector and partition
table of the hard disk drive for any attempt at modification. If
any attempt is made, the BIOS will halt the system and an error
message will appear.
Afterwards, if necessary, you will be able to run an anti-virus
program to locate and remove the problem before any damage
is done.
Quick Power On Self Test
Speeds up Power On Self Test (POST) after you power up the
computer. If it is set to Enabled, BIOS will shorten or skip some
check items during POST.
Swap Floppy Drive
Determines if the swap floppy drive is enabled or not.
Boot Up Numlock Status
Determines the default state of the numeric keypad. By default,
the system boots up with NumLock on.
Gate A 20 Option
This setting allows you to select how the gate A20 is handled.
Initially, the gate A20 was handled via a pin on the keykoard.
Today, the system chipset provide more common and much
faster support than keybords.
Typematic Rate Setting
Determines if the typematic rate is to be used. When disabled,
continually holding down a key on your keyboard generates
only one instance. In other words, the BIOS will only report that
the key is down. When the typematic rate is enabled, the BIOS
will report as before, but will wait a moment. If the key is still
down, it will report that the key has been depressed repeatedly.
You might use this feature to accelerate cursor movements with
the arrow keys.
Typematic Rate (Chars/Sec)
When the typematic rate is enabled, you can select the rate at
which the keys are accelerated.
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