Document autobooting macppc, and how to use the openfirmware boot menu

to boot MacOS (9/X) with the setup. ok miod@

1 files changed, 27 insertions, 0 deletions

diff --git a/distrib/notes/macppc/prep b/distrib/notes/macppc/prep
index 9cf7d61566e..696b78d745d 100644
--- a/distrib/notes/macppc/prep
+++ b/distrib/notes/macppc/prep
@@ -81,6 +81,33 @@ booting.  Typically the machine will then attempt to load Mac OS, if
 available.
 
 
+Autobooting OpenBSD/MACHINE
+
+It is possible to automatically boot into OpenBSD (selectably into MacOS)
+by setting up the following:
+
+setenv auto-boot? true
+setenv boot-device hd:,ofwboot
+
+[to save the results into nvram]
+reset-all
+
+These settings assume that the master of the first IDE bus has OpenBSD 
+installed on it, either in MBR format or in shared mode with ofwboot
+copied into the first HFS(+) partition. It is not necessary to specify
+'/bsd' on the boot line or in the boot-device variable, since it is the
+default.
+
+To boot in MacOS with this setup (works on most supported machines)
+press and hold down the Alt/Option key during reboot, and select which
+(MacOS/MacOS X) partition to boot in the graphical boot selector 
+presentes. Note that OpenBSD does not currently show up in this boot
+selector except for the installation CD. This works on most machines
+this has been tested with, but does not work on a Rev C (333MHz) iMac,
+perhaps this feature was added to the Openfirmware ROM after that
+machine.
+
+
 Sharing a disk with MacOS:
 
 OpenBSD/MACHINE is capable of booting either from a dedicated disk using