Subject: Re: 300MHz beige G3 questions
To: port-macppc <port-macppc@netbsd.org>
From: Andy Ball <andy.ball@earthlink.net>
List: port-macppc
Date: 12/07/2002 22:54:25
Hello Jeff,

   JW> The SCSI on the Beige is 5 MB/s, period.  The internal
     > SCSI connector and the external SCSI connector are
     > both on the same bus. That bus is unenhanced SCSI-II
     > (5 MB/s).

That did seem to be the consensus, but I did see mention of
10Mb/S internal, which made me wonder.  Thanks for the
clarification.

   JW> The SCSI bus in PowerSurge which appears as SCSI Bus 1
     > is controlled by the AMD 79C950 chip (CURIO Chip).
     > This bus has both an internal 50 pin IDC connector and
     > an external DB25 connector.  Both these connectors are
     > on the same bus.   There is circuitry to autodetect
     > whether termination is needed at the motherboard...

That's a nice touch, since termination is something that
people seem to get wrong.

   JW> So, on the older PowerSurge machines there is a MESH
     > SCSI bus which is internal only and supports 10 MB/s.

It's possible that's what the 10Mb/S mention referred to.

- Andy Ball.