The problem here is that the standalone filesystem code uses 'block' sized
buffers to access the disk.  With the filesystem:

> #        size  offset   fstype [fsize bsize cpg/sgs]
>  a:   6144768       0   4.2BSD   8192 65536  4272   # (Cyl.    0 - 6095)

this required several 64k buffers - which there wasn't space for.

The 'current' standalone filesystem code uses a single buffer, so has
a smaller footprint.

However the 'new' bootxx code also uses the standalone filesystem code and
is constrained (without a lot of work) to the lowest 64k of memory - so
doesn't stand a chance....  (it will work with 32k blocks).

	David

-- 
David Laight: david@l8s.co.uk