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Offline gdankoTopic starter

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A2000 floppy problem
« on: August 01, 2006, 06:13:48 AM »
I have a REV 6.2 A2000 WITH 3.1   ROMs. When I boot it up I get the "please give me a disk" animation, but when I insert a disk the unit reports a disk error... This is no matter which boot floppy I use. I have tried a number of boot disks and they all fail. I've tried every combination of floppy drive and cable I could imagine (3 different cables and 6 or so different floppies) and the result is always the same.

Now then, I took one of the offending floppy drive/cable combinations and was able to successfully boot a rev 4.3 2000 as well as a rev B 4000. So all signs point to the 6.2 board.

There is very little battery corrosion on the board, so I re-seated every chip on the board and tried again. Same story. The error is along the lines of "DF0 is a non-DOS disk".

I am at a loss here. Maybe the chip that controls the floppy disk is acting up? But I do not know which chip that is. I guess I could look it up somewhere.

Have you ever heard of such a thing? An error occurs on every attempt to boot off DF0.

By the way, I put the 3.1 ROM from the 6.2 board into the 4.3 board and everything worked like a charm.

I am usually not daunted by Amiga problems but this one has me stuck!
 

Offline gdankoTopic starter

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Re: A2000 floppy problem
« Reply #1 on: August 01, 2006, 06:55:56 AM »
Will a rev 4.3 CIA work in a 6.2 board?
 

Offline gdankoTopic starter

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Re: A2000 floppy problem
« Reply #2 on: August 01, 2006, 07:10:21 AM »
Okay I'll swap both tomorrow. I hope the 4.3 CIAs will work in a 6.2!
 

Offline gdankoTopic starter

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Re: A2000 floppy problem
« Reply #3 on: August 02, 2006, 05:21:34 AM »
Aha so it WAS the CIAs. Lucky I have access to another set so I can replace the ones I borrowed from the other machine.