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IBM 4865 external floppy drive

Hi!

The 4865 needs special card and bracket to be connected?

Thanks!
1
supervinx
6/13/2014 5:01:20 AM
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Hi Vincenzo !

> The 4865 needs special card and bracket to be connected?

Yes - as far as I know.
http://narangah.net/IBMedc2.jpg

This is the card for the AT-style machines.
The pinrows at the top take a cable from the planar and to the 5.25" 
drives. The rear port is the 37-pin Sub-D for the external 3.5".
Top / right is the external power connector. A pigtail ("Y") cable is 
used to interface to the power supply.
The external drive is the style *without* the additional power 
connector. A similar card was available for using the 48xx Typing System 
drive with the additional power cable.

Essentially this card is just a logic converter that interfaces the TTL 
AT 5.25" signalling to the tri-state 3.5" and reverts some signals.

-- 
Very friendly greetings from Peter in Germany
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0
Peter
6/14/2014 9:52:41 PM
Well, since my 4865 has the 4pin molex, can I connect the same to the rear port
of the PS/2 4869 external floppy adapter? I could derive elsewhere the 
needed power...
Or the pinout is different?
0
supervinx
6/16/2014 11:08:03 AM
Reply:

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