> On Sep 23, 2021, at 1:38 PM, Noel Chiappa via cctalk <cctalk@classiccmp.org>
> wrote:
>
>> So I can't say whether they are 18 bit compatible.
>
> Huh? The KM11 doesn't plug into the UNIBUS (or QBUS); it's a MASSBUS device (a
> solid-state storage device, actually), so it plugs into an RH11 or RH70 or
> something like that. (I should work with the VAX MASSBUS controller, too.)
> So the question 'is it 18 bit compatible' makes no sense.
The addressing wouldn't be a question because the Massbus controller handles
that. But the sector format is a different matter. If it's designed for
PDP-11 and friends, presumably it has a 512 byte sector size. For PDP-10 or
-20 use you'd presumably want a sector size consisting of some round number of
36 bit words.
paul
