On Fri, 27 Oct 2000, Dave Daniels wrote:
> In article <200010241048.LAA15753@lion.mpc-data.co.uk>,
>
>    Mike Pumford <mpumford@mpc-data.co.uk> wrote:
> > is F+ compatible as I am still running with RISCOS 3.7. Has anyone got
> > NetBSD installed on the same disk as a RISC OS4/F+ filecore format
> > partition? bb_riscbsd is BASIC perhaps the maths just overflows for
> > 2GB+ partitions so needs a little tweaking.
>
> I run NetBSD with RISC OS 4 with a F+ disk. My RISC OS partition
> is a little under four gigabytes in size with NetBSD having the
> rest of the disk. From this I would suggest that bb_riscbsd is
> RISC OS 4/F+ format compatible but looking at the code it will
> fail with a RISC OS partition greater than four gigabytes in size.

They added a new swi for larger disks, something like xxFS_SectorOp from RO 
3.6 (or RO 3.5 with support for large disks) (There's a call to also check if 
sector op is supported)  The details are in the PRM 5a (which I've not got) 
and also in a stronghelp file (that's to Andy Windgate for this info)

Cheers,
Chris