HOT-555 User's Manual 10
HOT-555 mainboard supports jumper
JP21
for discharge mainboard's
CMOS memory. The CMOS memory retains the system configuration
information in the component of R.T.C.
You should short this jumper for a moment when you wish to clear CMOS
memory, and then make sure open this jumper for normal operation to retain
your new CMOS data.
Note: Clear CMOS & R.T.C function available only when "DS12887A"
or "DS12B887" are in use.
There are different ways to discharge CMOS memory between "DS12887A" and
"DS12B887".
DS12887A
- Turn off power, close jumper JP21 for 2 to 3 seconds then release and
CMOS will be discharged.
DS12B887
- Close jumper JP21, turn on power durning 2 to 3 seconds then release JP21
and turn off power, CMOS will be discharged.
Clear CMOS - JP21
Flash EPROM Jumper - JP18
HOT-555 mainboard supports two types of flash EPROM, 5 volt and 12
volt. By setting up jumper JP18, you can update both types of flash
EPROM with new system BIOS files as they come available.
JP18 Pin 2-3 Closed for 5V, Pin 1-2 Close for 12V.
BIOS UPGRADES
Flash memory makes distributing BIOS upgrades easy. A new version of
the BIOS can be installed from a diskette.
The flash upgrade utility,
Awdflash.exe
, has two notice for BIOS upgrades:
Flash utility can't work under protected/virtual mode. Memory
manager like
QEMM.386
,
EMM386
should not be loaded. (or
Simply bypass all
config.sys
and
autoexec.bat
on system boot
up.
Flash utility supports both 5V and 12V Flash EEPROM.
