Re: Two 1541-II drives with problems

Hello Ville,

* On Tue, Apr 22, 2014 at 07:49:28PM +0300 Ville Laustela wrote:
 
> I made a test over ZoomFloppy (from WinVICE) and the drive 1 of the two drives.

If you told me that you have ZoomFloppy, I would have said to issue

        cbmctrl reset
        cbmctrl status 8
        cbmctrl status 8

from a command line window in order to see the same output. You could
not have to type in the "program" in WinVICE.

But, while you have OpenCBM, you might want to try to issue

        cbmctrl download 8 0xc000 0x4000 ROM.BIN

(note: This command needs some time (2 minutes, IIRC) to execute, so
keep patient!)

and have a look into the resulting file "ROM.BIN". It should be exactly
16384 byte long.

You could also retry this command multiple times. For this, issue the
following two commands again and again:

        cbmctrl download 8 0xc000 0x4000 ROM2.BIN
        fc /b ROM.BIN ROM2.BIN

Each time, fc should output that the files are identical.

If this test works, then you can be (almost) sure that the IEC part (the
communication part) is actually working.


Now, having verified this, you can try to check the drive itself. This
is the hard part. You could try to format a disk (either with 

        cbmctrl pcommand 8 n0:test,00

or with
        cbmformat -p 8 test,00

Personally, I would prefer cbmformat.)

Does the head bump now? Does the stepper move in any way?

Why do I want to format? Because format will bump the head even without
reading from the disk beforehand. Thus, if for example S.O. is not
working, your drive should at least bump and thus, move the R/W head.

BTW: What 1541 drive is it? 1541, 1541-2, 1541C? It would be best if you
could also send me the ROM.BIN file from above. The reason why I ask: I
want to know if your drive has the "track 1" sensor or not. This might
change the way the head bumps.


There would be possibilities to do even more checks with software, but I
doubt that software does not exist yet.

 

Regards,
Spiro.

-- 
Spiro R. Trikaliotis
http://www.trikaliotis.net/

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