The boot floppy is not mac formatted and that's why Mac spits it out on boot
you need to boot into Open firmware ( hold cmd-option o-f at startup),
insert the floppy and type boot floppy
If your monitor is blank  your default output device is probably ttya ( serial)
Get a program called Boot Variables (on  info-mac) and  use it to set your
output devcice to be screen ( provided you have the alias for screen,
otherwise you'll have to specify the card location in the device tree)
Check out the NetBSD FAQ page for macppc as well as apple OF technotes

HTH, Andy


>Hello people.
>I'm new to this list. I subscribed to it only because I have got a MacPPC
>g3 266, and I don't know what to do with it.
>the problem is that I have never worked with Mac's before and now I'm
>having a hard time even booting it from a floppy.
>
>could anyone tell me how to make this thing boot.
>there is a MacOs installed on this Mac but it won't boot b/c it can't find
>a library.
>I have downloaded a floppy image from ftp://ftp.netbsd.org
>dd'ed it to a floppy and instered it into Mac's floppy drive, it just
>ejects the floppy every time it boots.
>I know it is a very stupid question but I need your help, people.
>I checked How-To's but there is some general info how to install netBSD,
>I know I should ask Apple guys about how to boot from floppy, but, damn
>it, it shouldn't be that hard after all.
>
>could anyone tell me how stable the Macppc port of NetBSD is?
>maybe NetBSD is not worth installing and I can have something else?
>sorry people, please don't flame me for my being a [l]user in this aspect.
>
>thanks in advance,
>
>Regards,
>
>Igor N. Green