CHAINTECH CT-5SSV Manual page 31

D. Keyboard Interface
Typematic Rate Setting
When enabled, you can set the following two typematic control items. When
disabled, keystrokes are determined arbitrarily by the keyboard controller in your
system.
Typematic Rate (Chars/Sec)
The typematic rate sets the rate at which characters on the screen repeat when
a key is pressed and held down.
Typematic Delay (Msec)
The typematic delay sets how long after you press a key that a character begins
repeating.
E. Security Option
The Supervisor and/or User Password functions shown in Figure 3-1 must be set
to take advantage of this function. See Section 3-8 for password setting information.
When the Security Option is set to System, a password must be entered to boot
the system or enter the BIOS setup program. When the Security Option is set
to Setup, a password is required to enter the BIOS setup program.
F. PCI/VGA Palette Snoop
Some non-standard VGA cards or MPEG video cards may not show colors properly.
Setting this function to Enabled can correct this problem.
G. OS Select (For DRAM > 64MB)
If your system's DRAM is larger than 64MB and you are running OS/2, select
OS/2 as the item value. Otherwise, set the item value to Non-OS/2 for all other
operating systems.
H. Shadow Memory
Software such as system BIOS, video BIOS, SCSI BIOS, etc that resides in ROM
(Read Only Memory) chips is called firmware. Shadowing of firmware occurs when
BIOS is copied to RAM address C0000h through DFFFFh. Video BIOS loads into
the C0000-C7FFF memory area when video shadowing is enabled. If an expansion
peripheral in your system contains ROM-based firmware, you need to know the
address range the ROM occupies to shadow it into the correct area of RAM.
Shadowing improves the firmware's performance because the firmware can be read
by the CPU through the 16- or 32-bit DRAM bus as opposed to the 8-bit XT bus.
However, shadowing also results in reducing the amount of high memory (640
KB to 1 MB) for loading device drivers. Shadowing is used mostly for ROM chips
on ISA cards and not for PCI cards. Shadowing and playing games at the same
time may result in system instability as some games access the RAM memory area
being shadowed.
Award BIOS Setup Program
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