Advantech ARK-4170, User Manual, Page: 40 / 58

ARK-4170 User Manual 28
4.4.7 Gate A20 Option
Normal: A pin in keyboard controller controls GateA20 Fast (Default):
Chipset controls GateA20.
4.4.8 Typematic Rate Setting
The typematic rate is the rate key strokes repeat as determined by the key-
board controller. The commands are “Enabled” or “Disabled.” Enabling
allows the typematic rate and delay to be selected.
4.4.9 Typematic Rate (Chars/Sec)
BIOS accepts the following input values (characters/second) for type-
matic rate: 6, 8, 10, 12, 15, 20, 24, 30.
4.4.10 Typematic Delay (msec)
Typematic delay is the time interval between the appearance of two con-
secutive characters, when holding down a key. The input values for this
category are: 250, 500, 750, 1000 (msec).
4.4.11 Security Option
This field allows you to limit access to the System and Setup. The default
value is Setup. When you select System, the system prompts for the User
Password every time you boot up. When you select Setup, the system
always boots up and prompts for the Supervisor Password only when the
Setup utility is called up.
4.4.12 OS Select for DRAM > 64MB
This option allows the system to access greater than 64MB of DRAM
memory when used with OS/2 that depends on certain BIOS calls to
access memory. The default setting is Non-OS/2.
4.5 Advanced Chipset Features
The “Advanced Chipset Features” screen appears when choosing the
“Advanced Chipset Features” item from the “Initial Setup Screen” menu.
It allows the user to configure the system chipset according to his particu-
lar requirements. Below are some major items that are provided in the
Advanced Chipset Features screen.