🚀 go-pugleaf

hlexa@hotmail.com (Axel Hammerschmidt) writes:
> 
> You have to "bless" it - the Sytem Folder. The folder then displays a
> Mac ikon. Otherwise it has a generic ikon(Pogue&Schorr, Mac and
> PowerMac Secrets 3. ed, page 933).

The act of dragging the files "System" and "Finder" to the same folder
should cause the system to bless that folder without any additional
work.  Of course, you'll need a few other files in there for the system
to actually boot.

> And on a pre-system 7 installation you shouldn't have more than one
> System Folder on the same disk (Pogue&Schorr, page189).

Yes.  Otherwise, there's no way of knowing which will be blessed.

You can, however, work around the problem.  On my SE, I've got both
6.0.8 and 7.5.5 on the drive.  To allow dual-booting, I created a
"disabled" folder in each system folder.  When I want to switch
systems, I drag the "System" file into the disabled folder (which
un-blesses the system folder) and then drag the other OS's "System"
file out of its disabled folder (which blesses that system folder) and
restart.

Works without a hitch.

> And the Startup Disk control panel - if you are trying to use that -
> doesn't work on a Mac Plus. It's PRAM memory isn't big enough
> (Pogue&Schorr, page 192).

More to the point, the boot ROM doesn't use PRAM to find the system.
It has a hard-coded search order.  First it searches the floppies, then
(I think) any hard drive attached to the external floppy port, then the
SCSI bus, starting from ID 6 and moving down to ID 0.  The first device
it finds with a blessed system folder gets booted.  (This is why you
can boot a CD - the internal hard drive is normally ID 0, and external
CD-ROM drives are typically ID 3 or 6.)

-- David