Re: Dual booting ProDOS and SOS

["Jeff Blakeney" <jeff.blakeney@a2central.com.remove-z5i-this>]

  To: schmidtd
On Sun, 18 May 2008 17:45:30 -0700, schmidtd wrote:

> I'm having trouble building a disk image that I can use to boot both
> ProDOS on an Apple II and SOS on an Apple ///.  Looking through the
> archives, I understand what has to be on block 0 and block 1.  And I
> have a few disks that are formatted for ProDOS with both boot blocks
> in place.  But it doesn't seem to work to just copy over SOS.KERNEL,
> DRIVER and INTERP to such a disk and boot it in a real or
> virtual ///.  Is there an example disk image out in the wild that is
> thusly bootable in both type of machines?

If I remember the thread about this, block 0 is the ProDOS boot block
and block 1 is the SOS boot block.  On normal ProDOS disks, only block 0
has any code in it and block 1 is empty so you need to copy the SOS boot
block 1 from an SOS disk onto a disk which has the ProDOS boot block 0
(or vice versa).

But this is just from memory so I'm not entirely sure.
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