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IBM PS/2 vs standard "clone" 1.44 drives

I own two MCA IDE cards, so IDE disks can be used.

Has ever built an MCA card in order to replace the PS/2 floppy with a 
standard (?) one ?

The clone 1.44 disk must be bootable, obviously :)

Floppy drives are double-critical, since the setup is floppy based ...
0
supervinx
10/23/2011 4:20:57 PM
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supervinx wrote:
> Has ever built an MCA card in order to replace the PS/2 floppy with a
> standard (?) one ?

IBM Printing Systems (long before the outfit was sold to Ricoh) used the 
PS/2-style 720K and 1.44MB 3.5-inch floppy drives in the 6262 printer. 
When the PS/2-style drives became almost impossible to obtain, they came 
up with adapter cables that allowed them to use selected OEM 3.5-inch 
floppy drives in the 6262 printer.  They could do this because their 
drive mounting allowed for enough room in the back to accommodate the 
adapter cable, if you wanted to do the same with most PS/2s you'd need 
to "customize" the floppy mounting location.

Some of the RS/6000 models also used the adapter cable, I believe that 
the 7012-390 was one example.  I'm pretty sure that this adapter cable 
only worked with systems that used a single floppy drive.

Rick Ekblaw
0
Rick
10/23/2011 4:59:25 PM
On Sun, 23 Oct 2011 12:59:25 -0400, Rick Ekblaw <ekblaw@vnet.ibm.com>
wrote:

>supervinx wrote:
>> Has ever built an MCA card in order to replace the PS/2 floppy with a
>> standard (?) one ?
>
>IBM Printing Systems (long before the outfit was sold to Ricoh) used the 
>PS/2-style 720K and 1.44MB 3.5-inch floppy drives in the 6262 printer. 
>When the PS/2-style drives became almost impossible to obtain, they came 
>up with adapter cables that allowed them to use selected OEM 3.5-inch 
>floppy drives in the 6262 printer.  They could do this because their 
>drive mounting allowed for enough room in the back to accommodate the 
>adapter cable, if you wanted to do the same with most PS/2s you'd need 
>to "customize" the floppy mounting location.
>
>Some of the RS/6000 models also used the adapter cable, I believe that 
>the 7012-390 was one example.  I'm pretty sure that this adapter cable 
>only worked with systems that used a single floppy drive.
>
>Rick Ekblaw

If you are really talking about the old style PS/2 (30, 50, 70, 80
etc) drive this is going to be more complicated than a cable. Your
trouble is pin 2 and the lack of a sensing pin in the PS/2 drive.
Clone drives tell the adapter what disk is in there by looking for the
hole. PS/2 drives get told what the density will by the controller
based on the media descriptor in the boot sector on a read or simply
forced on a format. That is why you can format a disk any way you
want.
0
gfretwell
10/24/2011 4:38:12 AM
Reply:

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