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Celeron™ Processor Development Kit Manual
BIOS Quick Reference
5.4 Configuring Boot Actions
Embedded BIOS supports up to six different user-defined steps in the boot sequence. When the
entire system has been initialized, POST executes these steps in order until an operating system
successfully loads. In addition, other pre-boot features can be run before, after, or between
operating system load attempts. The following actions can be used:
Drive A: - K: Boot operating system from specified drive. If “Loader” is set to “BootRecord”
or “Unused”, then the standard boot record will be invoked, causing DOS,
Windows95/98, Windows NT, or other industry-standard operating systems to
load. If “Boot Method” is set to “Windows CE”, then the boot drive’s boot
record will not be used, and instead the BIOS will attempt to load and execute
the Windows CE Kernel file, NK.BIN, from the root directory of each boot
device.
Debugger Launch the Integrated BIOS Debugger. To return to the boot process from the
debugger environment, type “G” at the debugger prompt and press ENTER.
MFGMODE Initiate Manufacturing Mode, allowing the system to be configured remotely
via an RS232 connect to a host computer.
WindowsCE Execute a ROM-resident copy of Windows CE, if available. This feature is not
applicable unless properly configured by the OEM in the BIOS adaptation.
DOS in ROM Execute a ROM-resident copy of DOS, if available. This feature is not
applicable unless an XIP copy of DOS, such as Embedded DOS-ROM, has been
stored in the BIOS boot ROM. Copies of Embedded DOS-ROM may be
obtained from General Software.
None No action; POST proceeds to the next activity in the sequence.
5.5 Custom Configuration Setup Screen
The system’s hardware-specific features are configured with the Custom Setup Screen
(Figure 5-4). All features are straightforward except for the Redirect Debugger I/O option, which is
an extra embedded feature that allows the user to select whether the Integrated BIOS Debugger
should use standard keyboard and video or RS232 console redirection for interaction with the user.
If no video is available, the debugger is always redirected.