Multitech MT586SBC, RAS96 Upgrade Manual

Product Update
BIOS Upgrade for MT586SBC and RAS96
2/19/99
PN 82097650

The procedures that follow detail the process of replacing the BIOS chip currently residing on your
MT586SBC or RAS96 board with the new BIOS chip included in this upgrade kit. Please read all
instructions carefully before beginning the upgrade, to insure that system settings are not lost.

MT586SBC BIOS Replacement Procedure

Step Procedure

1 Prior to upgrading, reboot the segment to be upgraded and press the DELETE key to run the

BIOS setup utility. Record the basic system settings, including hard drive configuration, and keep
the setting notes as a reference for configuration of the new BIOS, later in this procedure.

2 Remove power from the segment to be upgraded, detach all internal and external cable

connections and remove the MT586SBC from it’s chassis.

3 Lay the MT586SBC board on a flat, stable, anti-static surface and locate the 32-pin PLCC socket

and BIOS chip on the board (see Figure 1).

BIOS Chip

Figure 1. BIOS Chip/Socket Location

4 Note the orientation of the chip inside the socket using the orientation notch on the chip (see

Figure 2). Later in this procedure you will be placing the new chip in the socket using the same
orientation.

Orientation

Notch

Figure 2. BIOS Chip Orientation

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5 Use the extractor tool provided with your upgrade kit to remove the 32-pin, PLCC BIOS chip from

it’s socket by gently prying one corner of the chip part-way out of the socket and then prying the
opposite corner of the chip until the chip pops out of the socket.

Note: Do not attempt to pry the chip completely out of the socket using only one corner. Doing so
could result in damage to the chip socket.

6 Orientate the new BIOS chip on top of the chip socket so that the orientation notch is in the

correct location (see Figure 2).
7 Gently press the chip into the socket until it snaps into place.
8 Install the MT586SBC into it’s chassis, being sure to re-connect all internal and external cables.
9 Apply power to the segment, and as the segment boots, press the DELETE key to run the BIOS

setup utility.
10 From the BIOS setup menu, select “LOAD BIOS DEFAULTS” and verify that settings match the

original BIOS (using your configuration notes from Step 1), making any necessary modifications.

Note: It is recommended that you

disable

the Daylight Savings Time feature in BIOS Setup. It
has been observed that Windows NT will experience certain anomalies if the Daylight Savings
Time feature is enabled.

11 Select “IDE HDD AUTO DETECTION” and choose the hard drive configuration that matches the

settings you noted in Step 1.

12 Select “SAVE & EXIT SETUP” to save all changes and reboot the system.
Note: If you have problems booting to the Hard Drive or see corrupt files that were fine before the

BIOS upgrade, DO NOT try to correct these problems using CHKDSK or SCANDISK. Reboot and go
into SETUP and verify the hard drive settings match those used before the upgrade. If problems
continue, reinstall the original BIOS and use original hard drive settings, then reboot.

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