[Bug 235060] [boot] FreeBSD 12.0 Release DVD and CD will not boot on PowerMac G5 Quad

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235060

--- Comment #12 from Mark Millard <marklmi26-fbsd at yahoo.com> ---
(In reply to consuli074 from comment #11)

I (at times) have access to 3 PowerMac G5s, 4 PowerMac G4s,
and 1 iMac G3. I sometimes help identify boot problems and
fixes for them. I'm familiar enough with what is required
to do so with some success. (I've been doing so via my own
FreeBSD builds, including self hosted. My PowerMacs do boot,
but I do not use CD media in my normal process.)

However, you have not pointed out evidence that someone else
could follow for your claims. They would have to start from
scratch and I'll not attempt that. The mere fact that booting
would fail is not a confirmation of your specific claims.
There are other possibilities, given your lack of detail.

What is the "bit pattern"? Where is it specifically in some
specific thing (specific example of the problem)? Sufficient
information  or someone to inspect for themselves for a
specific example? And so on. Is burning from MacOSX really
required or do other forms of burning produce the problem?
Were you over specific in that detail?

Have you ever looked up what the "bit pattern" means on the
processor that you have: how would the PPC involved interpret
it? (I've assumed here that it is in a area holding machine
code that would be executed. But I've no idea how to find
it so I'm not sure.)

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