Path: utzoo!utgpu!attcan!uunet!lll-winken!lll-tis!ames!mailrus!cornell!rochester!ritcv!moscom!adp
From: adp@moscom.UUCP (Alan Percy)
Newsgroups: comp.os.os9
Subject: Re: 3-1/2 inch floppy drives
Keywords: device descriptors
Message-ID: <1232@moscom.UUCP>
Date: 28 Jul 88 11:58:46 GMT
References: <385@mfgfoc.UUCP>
Reply-To: adp@moscom.UUCP (Alan Percy)
Organization: Moscom Corp., E. Rochester, NY
Lines: 19

In article <385@mfgfoc.UUCP> bill@mfgfoc.UUCP (Bill McDowell) writes:
>I am considering using a 3-1/2 inch floppy drive (Fuji M2537K)
>on a system running OS9/68000 version 2.2
>
>The Fuji M2537K has the capability of storing 1.4MBytes.
>
>Does anyone know how I can take advantage of the 3-1/2 inch
>drives capabilities? 

Sure, change the RBF Device Descriptor for the 3 1/2 disk.
You probably want to change the number of cylinders (PD_CYL)
to 160 instead of 80.  This is naturally assuming that you
have the drive connected in place of a 5 1/4 inch unit.

If you don't have source for building RBF descriptors, you
can "patch" a copy of the current one you have.
The PD_CYL value is offset into the device descriptor module by $4e.
Change the value to 160, then FIXMOD the module.
-- 
Alan Percy..........................{rutgers,ames,cmcl2}!rochester!moscom!adp