🚀 go-pugleaf

Darius Vaskelis <U39648@uicvm.uic.edu> writes:

>>>My Uncle has a veterinary clinic in Waverly, Ohio.  He presently runs
>>>VBOSS on a PS/2 Model 55 SX, and needs to upgrade from his present 60MB
>>>harddrive to ~120MB harddrive

>>According to my info, this is a 16Mhz 80386XS with and IDE controller and
>>2 disk-drive bays in the machine. In that case, you can buy almost any

>Whew!  Don't trust that info!

Sorry, you're right - don't trust that info. Though it comes directly from
IBM, it's not correct. I've double-checked elsewhere and it's NOT an IDE-
controller, but an ESDI-controller. (and a 386SX, not XS of course)

Furthermore there are NO available bays in the machine, so the 60Mb must be
removed.

>It is a 16MHz Intel 386SX-based machine, 16-bit Micro Channel
>Architecture.  However, you cannot just plug in any old IDE drive.

Right about that one, too.

>It uses a proprietary bus interface for hard disks, and IBM used special
>ESDI drives.  Flavors made by IBM were 30, 40, 60, 80, 120, and 160M.
>These are PS/2 ESDI drives that can be used in Model 50 (with the right
>interposer card), 50Z, 55SX, and 70.  They are 3.5" HH drives with power
>integrated right into the interface.  (No seperate power cable...)

>The 55SX has two 3.5" HH bays.  Generally, one is for the floppy and one
>is for the hard disk.  So, to upgrade the drive, you'd need to swap the
>original drive (IBM only sold them with 30/40/60/80M drives) for one of
                                         ------------
They also sold them with 160M drives (model 55SX-161). I'm sitting
with an old pricelist right here. I don't have a price for these drives,
but in relation to IBM's current disk-prices, it should go for around
$500 if it's at all available from IBM any more.

Sorry about the initial mis-information. Next time I'll double-check FIRST.

Christian
-- 
M. Christian Holmgreen / joker@diku.dk / mochmch@uts.uni-c.dk
M.Sc. student, University of Copenhagen, Dept. of Computer Science
"Human errors can only be avoided if one can avoid the use of humans"