Re: 8250LP - fault, how to fix?

From: Nicolas Welte (
Date: 2002-02-13 09:46:25

Marko Mäkelä wrote:
> Ethan Dicks wrote:
> > It means that you might have a defective 6530 chip, or a defective 6504 CPU
> > (the one that talks to the floppy drive, not the CPU that talks to the IEEE
> > bus).
> Isn't the 8250 equipped with two 6502 processors?  At least my 8050 and
> 8250 are.

It is, this applies to the whole series of those drives, including the
SFD1001. The older dual drives (4040) used a 6504 as the drive controller

I had that failure several times, in one case it turned out that the 6530
adaptor board was not seated correctly, but in two other cases it was a dead
6530. I guess a dead drive controller 6502 can also cause that error code,
but when I tried to remove that CPU, it just locked up the whole drive.


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