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dnl $OpenBSD: prep,v 1.7 2004/03/17 09:25:09 jmc 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/
The board should be configured with jumpers LK12, LK13, and LK14
set to the 1-2 position. However, most boards have been factory shipped
with those jumpers incorrectly set to the 2-3 position. These jumpers are
located as a block of three jumpers, near the processor and the serial
ports. More information about this jumper change can be found at the
following URL:
http://www.simtec.co.uk/products/EB110ATX/files/eb110atx-pcn001.html
** Note!
You will need ABLE version 1.95 or better in order to be able
to boot OpenBSD/MACHINE. Firmware updates are available from
Simtec at the following URL:
http://www.simtec.co.uk/products/EB110ATX/resources.html
For convenience, a few ABLE commands are described below:
(hd0)bsd
boots 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, unless
the boot process is interrupted by a keypress.
boot.cmd
command used to auto-boot, such as "(hd0)bsd" to
boot the bsd kernel from the first hard disk partition.
boot.timeout
delay until the system boots, in seconds.
ide.multi-limit
restricts the number of sectors read in a single command,
if necessary. This value needs to be set only if ABLE can
not access and boot from OpenBSD filesystems correctly.
A value of "1" ought to work in all cases.
dnl
dnl XXX bootable partitions
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