[Coco] need help with SCSI drives on CoCo3

Wed Apr 8 21:49:21 EDT 2020

On Wednesday 08 April 2020 21:13:14 Mark Marlette wrote:

> Bill might be on to something....
>
> I vaguely remember the SuperDriver SCSI drivers were broken after PD
> release.
>
> Might want to try an earlier version or a purchased one, they worked.
> Not sure if that is it or not.
>
> I will be getting the TC^3 running on my TC-9 at some point soon. It
> is powered up and on it's own desk now.

ISTR having a heck of a time, back then, and it was all in the 1 byte 
address decodeing at the end of the driver. the byte in front of the 
drivers crc.  Read the superdesc docs and I think you will find a clue. 
That byte contains the drives address in a marching bit pattern. 
Somewhere along the line it was changed to a hexidecimal value but the 
rest of the code never grew beyond the 8 addresses of that one bite, 
with only one bit set could do. And of course the controller was d7 set 
so you could actually address only 7 drives. So d0 set was drive 0, d1 
set was drive 1, d2 set was drive 2, yadda yadda. upto d6 = drive6.

Worse yet there are two drivers in the wild, one using the marching bit, 
and one calculating that marching bit on the fly. use which ever works 
for your system.

> Regards,
>
> Mark Marlette
>
> http://www.cloud9tech.com
> mark at cloud9tech.com
> mark at gamecamaddict.com
>
>
>
>
>
> On Wednesday, April 8, 2020, 05:23:04 PM CDT, Bill Pierce via Coco
> <coco at maltedmedia.com> wrote:
>
>
>
>
>
> Also, there were several people here having problems with the NitrOS9
> and HDBDOS SCSI drivers a while back. I don't know if the issues were
> ever resolved. It may have been just NitrOS9, but I seem to remember
> HDBDOS being mentioned as well.
>
>
> -----Original Message-----
> From: David Gettle <david17361 at gmail.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Wed, Apr 8, 2020 6:06 pm
> Subject: Re: [Coco] need help with SCSI drives on CoCo3
>
> Thanks Mark,
>
> I'll test that and let you know the results.
>
> On Wed, Apr 8, 2020 at 6:02 PM Mark Marlette
> <mmarlette at frontiernet.net>
>
> wrote:
> > David,
> >
> > Simply first.  Power off CoCo and SCSI PS.
> >
> > Unplug MPI and TC^3. Plug TC^3 directly in to the side of the CC3.
> > Power up CC3 and SCSI hard drive power supply
> >
> > Going from memory here.... Make sure your base address is $FF74
> >
> > POKE &HFF74,1
> > POKE &HFF75,0
> >
> > Does the SCSI hard drive light come on for /s0?
> >
> > If not then you have a defective TC^3. You will have to send in for
> > repair.
> >
> > Regards,
> >
> > Mark Marlette
> > http://www.cloud9tech.com
> > mark at cloud9tech.com
> > mark at gamecamaddict.com
> >
> >
> >
> >
> >
> >
> > On Wednesday, April 8, 2020, 04:45:35 PM CDT, David Gettle <
> > david17361 at gmail.com> wrote:
> >
> >
> >
> >
> >
> > Here's the situation in a nutshell: I keep getting a drive not ready
> > error from both my SCSI IBM hard drive SCSI drive 0, and my  Zip100
> > Drive 6 (terminated).
> > My CoCo3 is configured as follows: J/M floppy controller with RSDos
> > and HDBDos installed with a selector switch, 1 5.25"floppy as drive
> > 0 and a 3.5 inch drive as drive 1, the cloud9 SuperIDE with a 128mb
> > CF card as master and a IDE iomega Zip drive as slave, and a TC^3
> > SCSI controller with RTC connected to an IBM SCSI drive as drive 0
> > and an IOMega zip 100 as drive 6 with the termination switch on. the
> > problem I'm having is that I cannot access the SCSI drives I am
> > running Nitros9 Ver 03.03.00 booting from floppy drive 0 with the CF
> > card as /dd and /i0, the ide zip drive as /i1, the IBM drive as /s0
> > and the SCSI Zip100 as /s6 I also have drivewire installed, and a
> > win7 machine running drivewrie3 (I have drivewire4 but have not
> > installed it yet. I have tried to make configuration disks with all
> > of the included scripts with NitrOS-9 and the only ones that will
> > work are mb.floppy and mb.ide, the mb.SCSI and mb.SCSIformat scripts
> > do not make a bootable disk on my system.
> > Any help would be greatly apreciated I'm trying to recover files off
> > the IBM SCSI drive.
> >
> > --
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> > Coco at maltedmedia.com
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> >
> >
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>
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Cheers, Gene Heskett
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