I don;t know if MultiBooter and the System disk that comes with Darwin are
one and the same thing but they look similiar

Andy

>Yoshihisa Sugimoto wrote:
> <snip>
>
>     dev ide1
>     f3000038 constant $hfr
>     : $M $hfr rl@ or $hfr rl! 10 ms ;
>     : ata-enable 4 $M 80 $M 800000 $M 100 $M 20 $M 40 $M ;
>     : $M2 use-ata-interface ata-enable true ;
>     : set-device-ID set-drive-select ;
>     : reset-atapi-bus reset-ata-bus ;
>     ' open ' $M2 $R
>     ' enable-bus ' ata-enable $R
>     ' reset-ata-bus 2c + ' 2 $L
>
>	This section of code seems to be the key for ide devices, from the
>looks of it, it calls ata-enable, which is probably similar to a
>soft-reset of a SCSI controller. use-ata-interface is probably telling
>OF to talk to the ATA controller and not the ATA drive itself.
>ata-enable, could be like unit-ready for ata-disks, and in the case of
>Apple's ATA/ATAPI drivers, the drives shut down on sleep/restart, and
>may not be fully enabled/restarted in OF by default. Then it looks like
>it resets the ATA/ATAPI buses, opens the specified boot drive
>(ata/disk@0,0 maybe?), enables the ata-bus again, resets it. Where it
>goes from there I don't know, but I did notice there were several spots
>in the nvramrc with wait times anywhere from 10ms to 500ms. Perhaps the
>ata control isn't fast enough to reset and keep OF happy? Just some
>ideas, I'm not at home to try this but I will fool with it when I get
>back.
>	Any chance you could post the Multibooter to the NetBSD web site, or
>would Apple be unhappy about that?
>
>	Chris