Probably the best thing to do about the PROM wanting a SunOS
label is to leave one in there, and put the BSD label in sector
1 or something.

As for the memory map ... I loaded the kernel for executing at 3
MB, on the theory that the smallest sparc had 4MB and 1MB seemed
like a nice round number... and it turns out that SunOS 4.1.x uses
the same address.  Of course, the boot blocks must not overlap
each other, but areas between 3MB and 4MB seem safest.  (Of course^2,
since code gets loaded into 0x4000 and copies itself, overlap is
not likely to be a problem.)

Chris

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