[Coco] calling all MM/1 owners
devries.bob at gmail.com
Wed Jan 23 21:51:29 EST 2008
I'm booting directly from the hard drive. I'm not sure if booting from
floppy shows the same problems, and once the MM/1 has been running for a
while, it never misbehaves again.
I have the expansion with the two SIMM sockets. I never expanded the ram
beyond the 3MB, although I do have the instructions on doing that.
What were the problems with the newer(?) expansion boards?
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.
my blog: http://bdevries.invigorated.org/
----- Original Message -----
From: "Joel Ewy" <jcewy at swbell.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Thursday, January 24, 2008 12:39 PM
Subject: Re: [Coco] calling all MM/1 owners
> Bob Devries wrote:
>> 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.
> Are you booting directly from the hard drive, or booting with a floppy
> like on a CoCo? I do the latter on my MM/1 and don't have any
> problems. I seem to recall having problems booting from the hard drive
> when I first tried it years ago, so I've always used the floppy. Maybe
> I have the same problem you have and just don't realize it.
> What happens if you boot from a floppy disk. Can you then access the HD
> normally? (presuming you have all the proper drivers and device
> descriptors on your boot floppy of course...)
>> 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).
> Is your expansion board the one with the SIMM sockets on it, or the
> revision 3 board that puts the RAM on the backplane? Probably the
> former because I don't think many of the latter got into circulation. I
> probably have most of them as bare boards that never sold because the
> SCSI interface had major problems.
>> 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.
>> website: http://www.home.gil.com.au/~bdevasl
>> my blog: http://bdevries.invigorated.org/
>> Coco mailing list
>> Coco at maltedmedia.com
> Coco mailing list
> Coco at maltedmedia.com
More information about the Coco