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From: erik@netcom.UUCP (16)
Newsgroups: comp.sys.ibm.pc
Subject: Re: 3.5" 1.44/720K drive question
Summary: Toshiba 1.44Mb modification
Keywords: 3.5" drive, 1.44M, 720K
Message-ID: <30@netcom.UUCP>
Date: 26 Mar 89 00:28:18 GMT
References: <8168@xanth.cs.odu.edu> <22063@shemp.CS.UCLA.EDU>
Organization: NetCom Services  -  Public Access Unix System (408) 997-9175 guest
Lines: 24

In article <22063@shemp.CS.UCLA.EDU>, dkim@maui.cs.ucla.edu (Dong Hun Kim) writes:
= In article <8168@xanth.cs.odu.edu> rlb@cs.odu.edu (Robert Lee Bailey) writes:
= There is a small (tiny) pin which probes the hole. The pin is located
= at the lower right hand side inside the drive ( just below the hole ).
= If the pin is pressed (no hole) it recognizes the diskette as 720K,
= otherwise 1.44Mb. 
= 
= > Has anyone successfully modified their
= >hardware and/or software to defeat this feature?  (I use the term
= >"FEATURE" with tongue in cheek!)  I want to use cheap 3.5" diskettes
> >at 1.44M, but, this asinine gimmick forces us to format to 720K.
= >
=Modification procedure deleted]
=                        
> I implemented the above modification with very satisfactory
> results on Toshiba, Teac, and Sony drives.

I have a Toshiba ND-356T-A, FDD4603G0K, 1.44Mb drive.  On the bottom of
the drive Jumper B is used for density select, enable/disable
of the function.  If you wanted to install a switch you could just use
a header on the pins.  That way you could enable or disable the density
select for use.

Erik