Date   : Sun, 24 May 1998 19:04:24 +0100
From   : Dave <dfl@...>
Subject: Re: High density

In message <000401bd86e2$a6920440$0100a8c0@...>
          "Mark Usher" <marku@...> wrote:

> Hi Chris
> 
> > hardware refernce manual. A similar sort of speed modification
> > people have done on Atari ST who use
> > WD1773 chip which is esentailly the same and TRS80s which either
> > uses wd1773 or the older version of the
> > chip. I`ll see if i can find the ST modification details on HENSA.
> I did the 1.44MB floppy upgrade for a friend about 2 years ago. I have lying
> around a WD1772 which I removed from the STE. This was the standard DD FDC
> fitted to the ST range. I wish I could  remember what I fitted in it's
> place. I'll have to hunt about a bit. I have the info somewhere.

I upgraded my A420 to HD. The upgrade involves a carrier board with
the WD1772 AND crystal. You also had to mutilate the floppy cable
too. You can read DD discs with the HD drive without changing the
software, you need to hack the driver to read HD discs.

I'll email you the details if you want.


-- 
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