PCs that support only one floppy drive in hardware

Allison ajp166 at bellatlantic.net
Thu Oct 13 17:27:48 CDT 2005

>Subject: Re: PCs that support only one floppy drive in hardware
>   From: ard at p850ug1.demon.co.uk (Tony Duell)
>   Date: Thu, 13 Oct 2005 14:07:28 +0100 (BST)
>     To: cctalk at classiccmp.org
>> >> >F : 80 cylinder double sided
>> >> 
>> >> 300 rpm only
>> >> 
>> >> >G : 80 cylinder double sided, 360RPM, high density (1.2M for PCs)
>> >> 
>> >> Does both 300 and 360. (can replace the E and F with correct jumpers).
>> >
>> >I am not convinced of that. I think 'G' implies 360RM. The drive in 
>> >question is a 'GFR', thus having the capabilites of both the 'G' and the 
>> >'F', in other words both 360 and 300 rpm.
>> I am certain of the GFR, I have maybe 8 spares and 5 in use to confirm it 
>I am also certain about the GFR. I agree with you. The GFR is a dual 
>speed drive, 360 rpm and 300rpm.
>What I am saying is that the letter 'G' as a suffix indicates a 360rpm 
>drive. The letter 'F' indicates a 300 rpm drive (both being 80 cylinder 
>double-sided). So both G and F mean a dual speed drive.

No Tony, the 55F in single speed only.  Now if you mean 55GF is dual speed
you might be right by coincidence.  However the second letter and third are
for options to the basic drive such as door latch or media ready indicator.


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