🚀 go-pugleaf

In article <9312201119.AA01636@relay1.UU.NET>, hpapaleo@MAGNUS.ACS.OHIO-STATE.ED
 U
(H B Papaleonardos) writes:

[<stuff about Ken-Ton woes deleted>]...

|>         I told him over the phone to try his FD-502 and everything
|> works fine.  So the question: why doesn't his Ken-Ton SCSI work with
|> the SCII?  If it's any help, he has a CoCo 3 with 512k and I BELIEVE a
|> newer MPI.
|>         I would think that people who put together high-performance
|> systems would have included these components in their systems; did
|> they get that combo to work?

*chuckle*
I believe this is a case of RTFM, not carlessness on the part of the
designer.  The problem you are experiencing is that the Disto SC-II comes
preconfigured to address no-halt registers at $FF74.  Incidentally, this
is the same address the Ken-Ton interface uses.  You are probably experienc-
ing address conflict.

To resolve this, open the SC-II.  Hold the SC-II with the MPI connector
side to your left and the disk drive cable connector to your right.  If
you look at the 28 pin EPROM, move up about an inch and you'll spot a
lone jumper block (can't recall the jumper name).  Move the shunt from the
1 & 2 position to the 2 & 3 position.  This moves the no-halt register
addresses AWAY from $FF74, and now your Ken-Ton and SC-II can co-exist
peacefully.
--
Boisy G. Pitre - Microware Systems Corporation, Des Moines, Iowa
Internet:  boisy@microware.com      UUCP:  uunet!mcrware!boisy
The opinions expressed herein, unless otherwise stated, are mine only.