MEGA ST info - comp.sys.atari.st

Message from discussion MEGA ST info

PHANTOMM_2

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More options May 9, 2:32 pm

Newsgroups: comp.sys.atari.st

From: "PHANTOMM_2" <phant...@bellsouth.net>

Date: Fri, 9 May 2008 14:32:16 -0400

Local: Fri, May 9 2008 2:32 pm

Subject: Re: MEGA ST info

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"Ronald J. Hall" <darkl...@suddenlink.net> wrote in message
news:pan.2008.05.09.13.41.45.311351@suddenlink.net...

> On Thu, 08 May 2008 18:30:44 -0400, PHANTOMM_ wrote:

>> Already, switched out the internal drive, with a known working mech. And
>> got the same results.

> Well, at least you ruled that out.

> <snip>

>> Then going after the Yamaha chip.
>> Most of the chips in this mega are socketed, maybe ones loose.

> Could be, sometimes just removing and resocket-ing them is enough.

> Good luck.

I went back over the Mega ST PCB, and it has a problem with a chip or chips
that control
the reading/writing of a disk in the drive. I disconnected the power to the
internal drive and rebooted.
The Desktop comes up instantly without any drive Icons. I went a step futher
and added an
external disk drive (known to work) while leaving the power off the internal
drive.
And rebooted. Again as with the internal drive connected, it takes 1-2
minutes for the desktop
to come up. I can select items from the desktop, switch resolutions, add
devices and etc.
But if I try to read a directory from drive B, then I get the ole error
message that the disk maybe
damaged. I get the same results from the stock internal disk drive.

So, I'm positive that the internal drive is good. Just a matter of finding
and replacing the correct
damaged chip. I think I have what I need here to track it down, just thought
I'd ask in here to see
if anyone knows for sure which chip in the mega controls the reading/writing
of a disk in the internal/
external drives?

Guess I'll have to dive into a few of my tech manuals for that.

I'd like to fix this Mega as it's a nice one, used very little and has the
stock 4megs.
If someone reading this happens to have a Mega ST that they no longer want
then I'd be
interested in it for parts. I don't have to have the keyboard or the case or
the internal drive for that
matter, a working motherboard will do fine, version 5.0 if possible.

Send me a e-mail with details on the Mega ST that you have to get rid of or
sale to me
at: phant...@bellsouth.net

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