Re: FB-354 drive incompatibility

From: Michał Pleban <>
Date: Fri, 22 Apr 2016 22:36:31 +0200
Message-ID: <> wrote:

> How come? Eh, I keep forgetting that you didn't start your computing
> on a CBM ;-)

As a matter of fact, I did start on a C64, then went to Plus/4 and then
straight to a 486DX :-)

> All the Amigas move the head back and forth when waiting for the disk
> to be inserted, because that's how they worked the issue around.

I assume that moving the head clears the /CHNG flag and re-inserting the
disk sets it again?

What about the opposite situation? When we have the disk in the drive
and it is ejected - is /CHNG set in this case too?

> You mean other than faster mechanical wear of both the disk and the
> drive, extra noise and increased power consumption?  Probably not
> many ;-)

Doesn't this constant moving of the disk head wear the drive too?

> I guess your original assumption that a dirty cheap PIC would do the
> job still holds. A code for this even in asm is probably one screen
> of lines or less either.

Yes, but I am quite worried about the PCB size because space in the 1565
case is very limited. So I would be much happier without the PIC.


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Received on 2016-04-22 21:00:35

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