[Coco] calling all MM/1 owners

[Bob Devries]

I just removed the I/O board from the MM/1 to more closely examine the RTC.

I found that one of the termination resistors for the SCSI bus is oriented 
the opposite way to the other two. RN5, the middle one is different. Now I'm 
wondering what effect this will have on the working of the SCSI bus? Could 
this be my problem?

Joel, the termination resistor's 'notch' or 'dot' end should be in the 
solder pad that's square, am I correct?

--
Regards, Bob Devries, Dalby, Queensland, Australia

Isaiah 50:4 The sovereign Lord has given me
the capacity to be his spokesman,
so that I know how to help the weary.

website: http://www.home.gil.com.au/~bdevasl
my blog: http://bdevries.invigorated.org/

----- Original Message ----- 
From: "Dave R in Illinois" <lazyhand at sbcglobal.net>
To: <coco at maltedmedia.com>
Sent: Thursday, January 24, 2008 12:03 PM
Subject: [Coco] calling all MM/1 owners


> Have you checked to make sure the drive / cable is properly terminated? 
> I've
> seen corroded pins on terminators do strange things to raid arrays. I 
> never
> owned a mm1 so I am not sure if there even is one, I would assume there
> would be.
>
>
>
> -Dave
>
>
>
> ______________________________________________________
>
>
>
> I have a small problem with my MM/1, and I'm wondering if there was ever a
> fix for it?
>
> When I power it up, the computer goes through its procedure to try to boot
> from the floppy, and then from the SCSI hard disc. It *always* locks up 
> the
> SCSI bus at that point, and pressing reset does not unlock it. I need to
> cycle the power to unlock it. It then usually fires up correctly, but not
> always.
>
> My MM/1 is a 3MB with the expansion board. It has a 170MB Quantum SCSI
> drive. The drive itself initialises properly (at least, it makes all the
> right noises).
>
> Comments anyone?
> -- 
> Regards, Bob Devries, Dalby, Queensland, Australia
>
> Isaiah 50:4 The sovereign Lord has given me
> the capacity to be his spokesman,
> so that I know how to help the weary.
>
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco