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@@ -1,19 +1,41 @@
-dnl $OpenBSD: prep,v 1.1 2004/02/08 00:35:14 drahn Exp $
+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.
-Important ABLE Firmware command examples:
+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 idenfied
+ 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.
-XXX autoboot
+The following environment variables control the system startup:
-XXX arguments to kernel
+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
-XXX bootable partitions
+dnl XXX arguments to kernel
+dnl
+dnl XXX bootable partitions