I wrote:
> Well, you've explained one problem already. You're not supposed to put
> disk drives and tape drives on the same Massbus.
Bill Pechter <pechter_at_pechter.dyndns.org> wrote:
> It's because of software limitations and (If I remember correctly)
> disk and tape drives used different numbers of massbus registers
> so you have to jumper (in the PDP11 case) the RH differently.
And since the KS10 uses a variant of the RH11, it has the same limitation.
That's why there are two RH11s in a KS10. In theory it apparently can
handle three, but I've not heard of anyone installing a third, and I
don't know whether the software supports it.
> Don't know about the 10's though. Vax RH780's could do both disks and
> tapes on the same massbus.
Might be possible on the RH10 or RH20, but I don't think software
supports it.
Received on Wed Oct 13 1999 - 11:17:12 BST