Hervé,

As I predicted in an earlier post, the drive does not work with a ST 225 and the cover on.  You have to make custom risers to compensate for the drive height differences and to keep the controller board completely straight, or leave the cover off.  A slight bend in either controller will prevent the drive from initializing correctly.

Bill



-------- Original Message --------
> From: hwarin@neuf.fr
> Sent: Monday, April 27, 2009 10:01 AM
> To: cbm-hackers@ling.gu.se
> Subject: Re : Re: 90x0, was: New user
> 
> [ Note: This mail was converted from HTML to text by majordomo.
>         Formatting might be poor. ]
> 
>   Hi, all
> 
>   Very amazing the "explosion" of answers to my mail "hello - I have a
>   9090 working !". Thanks you all for your welcome messages.
> 
>   I've got some update from my 9090 :
>   - I've taken picture of all that could be taken in picture
>   - I've closed the box and tryed to put it in the opposite side (fan
>   up) in the objective to have a better heat extraction. The ST225
>   stopped to work ! I've put it again on the side with the fan down and
>   the ST225 started to work again ! Any idea the reason why ?
>   - I've had a closer look to the tandon 603 - It's definitely dead as
>   the plate engine can't run the mecanism - There is a huge hard point
>   and it's even difficult to rotate it by hand. There most have been a
>   serious choc to this unit, even if silent blocs are imposants.
>   - I've changed the unit number back to #10 (removed the strap wire)
> 
>   ==> Another questions
>   - How many operationnal D9090 do you imagine are actually still in
>   the world ?
>   - How many were built ?
>   - What was original retail price ?
>   - Does it exists a "test/demo" disk for this ? Does anyone has one
>   copy ?
> 
> 
>   Best regards - Hervé
> 
> 
>   ----- Message d'origine -----
>   De: Ethan Dicks
>   Date: Mercredi, Avril 15, 2009 16:11
>   Objet: Re: 90x0, was: New user
>   À: cbm-hackers@ling.gu.se
> 
>   > On Wed, Apr 15, 2009 at 3:42 AM, Anders Carlsson
>   > wrote:
>   > > Ruud Baltissen wrote:
>   > >
>   > >> we can replace the MFM-drive by any drive we like:
>   > >
>   > > Honestly though, aren't 90X0 drives mostly collectable?
>   >
>   > Sure, but the 90X0 drives are also repairable and somewhat
>   > modular, so
>   > for me, at least, fixing a broken DOS board is something obvious to
>   > do. If I had a dead drive or a dead "middle board", I'd more
>   > seriously consider either a more modern MFM drive (like an ST225)
>   or
>   > some way to hang a drive or drive emulator (FlashROM) off of the
>   SASI
>   > port so that the DOS board _thinks_ there's a drive out there.
>   >
>   > I'm not one to have a box just to look at - I want to run it if it
>   > works and fix it if it's broke. I know there are those out there
>   who
>   > are more interested in a "complete" system because of how it
>   > looks. I
>   > am much more in the "use and repair as necessary" group. That being
>   > said, I probably wouldn't toss out an old TM602S or TM603S even if
>   I
>   > did replace it for use with something more modern (even an ST225).
>   >
>   > > For
>   > > practical purposes of a storage device, I'm sure you can build
>   > something> that is both smaller, lighter and more durable from
>   > almost scratch.
>   >
>   > Sure. Since there's virtually no software that depends on DOS3.0
>   REL
>   > files, there's nothing particularly magical about the
>   implementation
>   > of CBM DOS on the 90x0. One could design an entirely new IEEE-based
>   > storage device (and someone probably should), but since I already
>   have
>   > a couple of D90x0 drives sitting around and because the IEEE
>   hardware
>   > and firmware is done and known to be working on the DOS board, I
>   > always attacked the problem from the point of view of putting
>   > something different on the far side of the DOS board than the
>   "middle
>   > board" and Tandon disk (especially since Tandons are odd and rare
>   and
>   > expensive).
>   >
>   > I am not in a position to be designing an IEEE storage device from
>   > scratch, but if such a project comes around, I'd be happy to help
>   > debug and use it. The one thing that I'd want it to do is to
>   support
>   > either floppy images (so U1/U2 commands work on the contents of the
>   > image) or have a way for an application to seek to an arbitrary
>   > position in a file and read a block. This is to support a virtual
>   > memory scheme for Infocom games. I have it working on floppy-based
>   > games (i.e. - just as Infocom did for the C-64), but am unable to
>   > migrate that to the D90x0. Some/most of the Flash-based IEC drive
>   > emulators that I've seen will let you mount a partition that's a
>   .d64
>   > file, which would completely suffice.
>   >
>   > -ethan
>   >
>   > Message was sent through the cbm-hackers mailing list
>   >
> 
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