Re: Digest for cromemco@googlegroups.com - 2 Messages in 1 Topic

[zenxyzzy]

i most certainly read this stuff.  i had (briefly) a system-3 with 4 spindles of persci.  unbelievable sounds coming from a floppy.

--curt

On Fri, May 17, 2013 at 6:27 PM, <crom...@googlegroups.com> wrote:

  Today's Topic Summary

Group: http://groups.google.com/group/cromemco/topics

• Floppy Drive Exerciser CDOS Program [2 Updates]

 Floppy Drive Exerciser CDOS Program

Martin Eberhard <mfebe...@gmail.com> May 17 08:26AM -0700  

I'm not sure anyone reads these, and I get the feeling that I am the last
guy interested in these cool old Persci drives on Cromemco machines...
 
I recently restored a much newer Persci 277 drive (serial number around
17,000). This drive had an LED instead of an incandescent bulb in the
positioner servo. I learned that the adjustment procedure for this drive is
slightly different than for drives with incandescent bulbs, because the LED
operates at a lower voltage than the bulbs do.
 
I've updated my Persci 277 adjustment document to reflect this variation of
the Persci 277. The new version is here:
 
https://docs.google.com/file/d/0B-XdfCubTNJJeW5UdjVyWGdxUXM/edit?usp=sharing
 
And, my Flexer program is really great for getting these drives working. I
am not sure how you would restore one of the Persci drives on a Cromemco
machine without Flexer. Here's the link to Flexer, in case you missed it
earlier:
 
 
Source code:
 
https://docs.google.com/file/d/0B-XdfCubTNJJdzEyRndLS09nSkE/edit?usp=sharing
 
Executable:
 
https://docs.google.com/file/d/0B-XdfCubTNJJaXZiYkJhSDloNTA/edit?usp=sharing
 
-Martin


 

Martin Eberhard <mfebe...@gmail.com> May 17 12:42PM -0700  

Here's an updated version of Flexer, the Floppy Disk Drive Exerciser for
CDOS. This version (2.03) has a couple of user interface improvements over
the previous version.
 
The user's manual:
 
https://docs.google.com/file/d/0B-XdfCubTNJJRG5HZFlYTlpZYkU/edit?usp=sharing
 
The Source Code:
 
https://docs.google.com/file/d/0B-XdfCubTNJJdHRmMWNoVUdHNE0/edit?usp=sharing
 
And the CDOS executable:
 
https://docs.google.com/file/d/0B-XdfCubTNJJTFdZcG44dERwX2M/edit?usp=sharing
 
-Martin


 

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