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Article #43218

Help with an MM/1 Extended

#43218
From: knudsen%ihades.UUCP.UUCP
Date: Wed, 15 Dec 1993 15:56
45 lines
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To: coco@pucc.princeton.edu eric_levinson@rcisnet.org
Reply-To: m.j.knudsen@att.com

>Firstly, I notice that on the Microware disks there arent any extra device
>descriptors for /t2 and /t3.  Do I just modify /t4?  Is there a descriptor

Right -- you are "expected" to get good at Dmode, Tmode, etc. and custom-build
your own descriptors.  I forget exactly what utilities you use.

>Secondly, is there a vendor of ROMS that can produce a ROM that bootstraps from
>the SCSI?  It would be nice to boot from the hard disk instead of a floppy.

Mine already does, and my ROM is probably outa date.  Yours must
be very old, maybe the original issue.  The last version of boot
ROM from Kev Pease would check your floppy drive, try to boot from
it if a disk was in, and if that was not a "system disk" (no Os9Boot),
then boot from hard drive.

>Thirdly, my system will not boot.  I recently installed a 5.25" disk drive and
>something must have happend.  I removed the extended board and put my original
>3.25" drive in and it still won't boot.  I hear the drive make a noise 3 times,
>and then I get a Status Error #00F0 and then it resets.  I have tried other

I assume you've tried original boot files *without* the added
descriptor for the 5.25" drive?  One problem with OS9, at least on
the MM/1, is if there is any descriptor module in your Bott whose
hardware fails to initialize properly, the boot will fail.

>Fourthly, I notice all the floppy descriptors have the sectors per track
>setting set to 33.  Shouldn't this be 36?  If I remember correctly a 1.44MB
>drive when used on a PC has 18 sectors per track at 512 bytes per sector.  On

You can't just double the number of sectors, cuz you also double
the number of blank gaps between sectors.  So 33 is the limit.  In
fact, many MM/1 users have backed down to 32 or 31, tho I still
use the old 33 with no trouble.

>And lastly, I would like to know who holds the information on system
>registration.  I would like to change the ownership from the person I bought it
>from to me.

He he.  IMS is gone.  Hopefully the list of owners was transferred
to Blackhawk Enterprises.  You certainly are in line for some
software upgrades, but for now you pretty much have to get them
from another MM/1 owner or a BBS.
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From: knudsen%ihades.UUCP.UUCP@ATT.BITNET
Subject: Help with an MM/1 Extended
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