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dnl $OpenBSD: prep,v 1.2 2004/02/08 23:12:14 miod Exp $
To be able to boot the OpenBSD/MACHINE installation program, you will
need to acquire some limited knowledge of ABLE Firmware, the low-level
process that controls the microprocessor after hardware initialization
and diagnostics are performed but before control is handed to the
operating system.
A complete documentation on the ABLE firmware is available from Simtec at
the following URL:
http://www.simtec.co.uk/products/SWABLE/files/able-doc-allset/
For convenience, a few ABLE commands are described below:
boot (hd0)bsd
boot the ELF file 'bsd' from the disk partition identified
by firmware as hd0.
nvset variable value
sets a firmware environment variable.
nvsave
saves all variable changes to non-volatile memory.
nvclear
restores environment variables defaults.
The following environment variables control the system startup:
boot.auto
when set to "true" (which is its default value), the system will
attempt to execute the command set in the "boot.cmd" variable
after "boot.timeout" seconds.
boot.cmd
command used to auto-boot, such as "boot (hd0)bsd" to boot the
bsd kernel from the first hard disk drive.
boot.timeout
delay until the system boots, in seconds
dnl XXX arguments to kernel
dnl
dnl XXX bootable partitions
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