> However, there is no routine to do this on the 68040 class of
> machines (at least there wasn't pre 1.2 - has anything changed?),
> and NetBSD assumes it's contiguous. When the MMU is disabled, it
> crashes.

The memory layout of the IIci and IIsi differ only in that the IIsi has
1MB soldered into bank A whereas the IIci has 4 SIMM slots for bank A.

Scott has written a routine that should allow the 040 to get the mapping
info.  It's in -current (not in 1.2 or earlier sources).  I haven't
tried it, yet.  You may have to enable it in pmap_bootstrap.c.

> > 1)  What does the FPSP compile option do?  040 floating point software?
> >     Do I need this to use an 040 CPU?
> 
> This is only required if your Daystar is a "light" 040 with no FPU,
> ie. a 68LC040.

Nope.  You need FPU_EMULATE if you have an LC040.  If you have a full
040, you need FPSP because it emulates instructions that were in the
68881 and 68882 but not in the FPU on the 040.

-allen

-- 
              Allen Briggs - end killing - briggs@macbsd.com