[Coco] 3.5" drives

Willard Goosey goosey at virgo.sdc.org
Tue Aug 24 03:24:30 EDT 2004


>Date: Mon, 23 Aug 2004 08:41:38 -0700
>From: Kevin Diggs <kevdig at hypersurf.com>
>	In the box containing the hard drive is the interface
>card, a WD1002-05G. It has 4 40 pin WD chips:  WD1614AL-00,
>WD1010AL-00, WD2797PL-02 (floppy chip), and a WD1015PL-00.
>It can control three ST-506 hard drives and three floppies.
>
>	The WDDisk driver manual mentions high capacity floppy
>operation:  both 250/500 kbit bit rates and 300/360 rpm speeds
>are mentioned. The little satellite board does more than control
>motor speeds. It has only two chips:  a 74ls157 and a 7438.
>Will this also work with 3.5" HD floppies?

I don't know for sure, but if it supports both bit rates and both rpm
speeds it should work.

I don't think I've heard of the WD2797 floppy controller, but from my
limited experience, xx9x floppy controllers can handle HD, xx7x can't.

Willard
-- 
Willard Goosey  goosey at sdc.org
Socorro, New Mexico, USA
"I've never been to Contempt!  Isn't that somewhere in New Mexico?"
   --- Yacko



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