Hello Jeremy,

there are options to use a bootloader during installation of NetBSD in
sysinst. (at least in current)
I think it was in the fdisk part or disklabel part, where you could set
names for the bootloader and activate the bootloader.
I recently used it for the same purpose (for the first time). 
It's a tiny bootloader, but works fine.

The only thing I was confused of was, that the bootloader prints:

Fn Name
1: NetBSD
2: FreeBSD

So I thought "Fn" means Function Keys. But F1/F2 does not respond, but "1 or
2".

Greets, Z.

> --- Ursprüngliche Nachricht ---
> Von: "Jeremy C. Reed" <reed@reedmedia.net>
> An: netbsd-help@netbsd.org
> Betreff: need a multiboot with FreeBSD
> Datum: Tue, 11 Oct 2005 18:40:18 -0700 (PDT)
> 
> >From NetBSD-daily I installed latest NetBSD 3-BETA using sysinst.
> 
> I didn't see any option to create a boot selector. I did install NetBSD to
> my first slice on wd0.
> 
> When I rebooted, FreeBSD came up. I have FreeBSD on its ad0s3 -- which is 
> my third slice on same (and only harddisk).
> 
> I attempted to create boot loader in FreeBSD with its:
> 
> fdisk -B -b ad0
> 
> But rebooting said "Invalid partition table".
> 
> So I reboot again to sysinst and from the shell I run:
> 
> fdisk -c /usr/mdec/mbr_bootsel /dev/wd0
> 
> Then after reboot it gives me a prompt:
> 
> Fn:
> 
> But no choices and says error whatever I press except Enter.
> 
> And it takes me back to FreeBSD.
> 
> >From NetBSD, I also tried:
> 
> installboot -v /dev/rwd0e /usr/mdec/bootxx_ffsv2
> 
> I tried several different things rebooting back and forth between FreeBSD 
> and NetBSD. But it is a slow process.
> 
> Any ideas for NetBSD on how to get my boot menu? (Or FreeBSD ideas?)
> 
> I want a choice at menu to boot: NetBSD first fdisk partition or FreeBSD 
> at third fdisk partition.
> 
> FreeBSD tells me:
> 
> glacier# fdisk ad0
> ******* Working on device /dev/ad0 *******
> parameters extracted from in-core disklabel are:
> cylinders=77520 heads=16 sectors/track=63 (1008 blks/cyl)
> 
> Figures below won't work with BIOS for partitions not in cyl 1
> parameters to be used for BIOS calculations are:
> cylinders=77520 heads=16 sectors/track=63 (1008 blks/cyl)
> 
> Media sector size is 512
> Warning: BIOS sector numbering starts with sector 1
> Information from DOS bootblock is:
> The data for partition 1 is:
> sysid 169 (0xa9),(NetBSD)
>      start 63, size 10233342 (4996 Meg), flag 80 (active)
>          beg: cyl 0/ head 1/ sector 1;
>          end: cyl 636/ head 254/ sector 63
> The data for partition 2 is:
> sysid 130 (0x82),(Linux swap or Solaris x86)
>      start 10233405, size 610470 (298 Meg), flag 80 (active)
>          beg: cyl 637/ head 0/ sector 1;
>          end: cyl 674/ head 254/ sector 63
> The data for partition 3 is:
> sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
>      start 10843875, size 10233405 (4996 Meg), flag 80 (active)
>          beg: cyl 675/ head 0/ sector 1;
>          end: cyl 1023/ head 254/ sector 63
> The data for partition 4 is:
> <UNUSED>
> 
> And:
> 
> glacier# disklabel ad0s1
> disklabel: /dev/ad0s1: no valid label found
> glacier# disklabel ad0s3
> # /dev/ad0s3:
> 8 partitions:
> #        size   offset    fstype   [fsize bsize bps/cpg]
>    a:  1048576        0    4.2BSD        0     0     0
>    b:   341600  1048576      swap
>    c: 10233405        0    unused        0     0         # "raw" part, 
> don't edit
>    d:  8843229  1390176    4.2BSD        0     0     0
> 
> 
> Thanks,
> 
> 
>   Jeremy C. Reed
>