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C C h h a a p p t t e e r r 4 4 3 3 3 3
When you turn on your PC, the following sequence of events occur:
Your PC performs its usual initial tests and setup, such as a memory test.
MBA displays its configuration message “Initializing MBA. Press Ctrl+Alt+B to
configure…”.
If you press the hot key sequence while the message is displayed you enter the MBA-
based Configuration Screen where you can view or change various MBA options,
including the option to disable the display of this configuration message.
The subsequent events vary depending on whether your PC contains a BBS-compliant
BIOS.
With a non-BBS BIOS
If a diskette is detected in drive A:, and local boot options are enabled, drive A: is
treated as the boot device without any intervention from the user. MBA removes itself
from the system memory at this point.
The message: “Type H to boot from Hard disk” or “Type N to boot from Network”
appears (depending on how MBA is configured, and whether there is a hard disk
present in the PC). You have a period of time (based on the Message Timeout option)
to press the appropriate key before the default boot device is selected automatically.
At this point you can press any key other than H or N to tell MBA to boot from the
default boot device without waiting the full time period.
If the hard disk is chosen as the boot device, MBA removes itself from the system
memory. If the network is chosen as the boot device, MBA attempts to transfer the
boot files from the network server and then transfer control to these boot files.
With a BBS BIOS
If “MBA UNDI” is positioned first in the boot order (refer to “ Setting the Boot Order on
PCs with BBS BIOS ” in Chapter 3), MBA attempts to transfer the boot files from the
network server and then transfer control to these boot files.
If “MBA UNDI” is not positioned first in the boot order, it is executed only if the devices
that preceded MBA UNDI in the boot order fail to boot.
At this point, if MBA attempts to perform a network boot and fails, it may be because you
have not set up your server to support network booting. See the appropriate chapter of this
guide for your network protocol.