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MOPSlcdGX1 Product Manual
21.8.2 Preventing Problems When Updating or Restoring BIOS
Updating the BIOS represents a potential hazard. Power failures or fluctuations that occur
when you update the Flash ROM can damage the BIOS code, making the system
unbootable.
To prevent this hazard, many systems come with a boot-block Flash ROM. The boot-
block region contains a fail-safe recovery routine. If the boot-block code finds a
corrupted BIOS (checksum fails), it boots into the crisis recovery mode and loads a BIOS
image from a crisis diskette (see above).
Additionally, the end user can insert an update key into the LPT port to force initiating
the boot block recovery routine.
For further information on the update key and the crisis diskette, see Kontron Embedded
Modules application note
Kontron Embedded Modules
JAP0034.
57
Appendix B: BIOS Operation
Revision 1.3
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