TYAN TAHOE AT Manual page 14

2.5.6 Flash ROM-Jumper J33
The S1680S uses flash memory to store BIOS Setups. It can be updated as
new versions of the BIOS become available. The flash utility will guide
you through the process step by step. However, we do not recommend
that you flash the onboard BIOS. This procedure should only be
done by a qualified technician or a Tyan technical support engineer.
J33 determines which type of Flash EPROM is used. This jumper has been
set to match the onboard BIOS chip. The factory default for the S1680S
is on pins 1-2(5V). Depending on the type of EPROM used, some boards
may have J33 on pins 2-3(12V). (Refer to Page 12 for more information.)
W arning:
Do not change J33--(It has been pre-set at the factory!!)
2.5.7 Hardware CMOS & Password Reset
If you are locked out of your system because you have forgotten your
password, or you have set the CMOS incorrectly, follow the instructions
below:
a. Power off the system
b. Close J36 by covering the pins of J36 with a jumper cap to short
the circuit between the pins.
c. Wait for 5 seconds, and then remove the jumper from J36.
d. Apply power to the system.
By following the above procedures, the password and CMOS will be
reset to BIOS defaults.
S1680S-001-02 http://www.tyan.com 14