3 rom-bios sockets, 1 standard bios rom, 4 bios cmos setup – Kontron MSM800BEV User Manual

Page 82: Rom-bios sockets, Standard bios rom, Bios cmos setup

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MSM800BEV

/ BIOS

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80

Attention!

Never update a BIOS with a USB memory stick!

The system will crash during the download!

Only use a USB or a standard floppy.

Also, if you have two IDE devices attached to the board (e.g., HDD and CD-ROM), disconnect the CD-ROM before
downloading the BIOS.

9.3 ROM-BIOS Sockets

An EPROM socket with 8bit wide data access normally contains the board's AT compatible ROM-BIOS. The socket takes
a 29F020 EPROM (or equivalent) device. The board's wait-state control logic automatically inserts four memory wait
states in all CPU accesses to this socket. The ROM-BIOS sockets occupy the memory area from C0000H through FFFFFh;
however, the board's ASIC logic reserves the entire area from C0000h through FFFFFh for onboard devices, so that this
area is already usable for ROM-DOS and BIOS expansion modules. Consult the appropriate address map for the
MICROSPACE PC-Product ROM-BIOS sockets.

9.3.1 Standard BIOS ROM

Device

FWH
E0000 - FFFFFh

Core BIOS 128k

C0000 - C7FFFh

VGA BIOS 32k

Map

CC000 - CFFFFh

FREE

9.4 BIOS CMOS Setup

If wrong setups are memorized in the CMOS-RAM, the default values will be loaded after resetting the RTC/CMOS-RAM
by de-soldering the battery.

If the battery is down, it is always possible to start the system with the default values from the BIOS.

Note:

For the MSM800BEV/XEV/XEL: Should the product have an inaccurate BIOS setup and won't boot up,
proceed as follows. (The installed BIOS must be V1.20 or newer.)

1. Set J7

2. Turn the power on

3. Press F1 to enter the BIOS setup

4. Select "L" to load the BIOS default settings

5. Remove J7

6. Select "X" to save and exit the BIOS setup

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