Casio CZ/ VZ/ FZ - Pro Series

magnetic writing field is weaker in 720k as the tape used was different

the 1.44mb disk used a metal type tape material and needed a bigger magnetic write feild to write to it

a 1.44mb drive does both it gets its control data from the second contact flag which is an extra hole in the 1.44mb floppy disk but still requires an onboard floppy controller

on the cpu board as in the ensoniqs there controllers are 720k only so cant even write 1.44 disks as they dont carry the signals to write to 1.44mb disks

now when you cover the hole in a hd disk and put it into the floppy drive the disk will be seen as a 720k disk and the magnetic write feild will be 720k strength now it will write to the hd disk but because the feild is weaker the information does not take properly on the hd disks and why you get checksumm errors or they just fail over time 

plus the medium has a life of about 5 years before it starts to fail so old disks they fail quicker when reformating them and putting new material on them 


  ----- Original Message ----- 
  From: steve_the_composer 
  To: CZsynth@yahoogroups.com 
  Sent: Tuesday, August 20, 2013 5:00 PM
  Subject: [CZsynth] Re: Can't get sysex to work with a CZ-5000


    
  Excellent suggestion [trim the previous messages]! I used to do this a whole lot more than I do now. It used to bother me (I get digests), but I decided "If you can't beat them, join them."

  As for the different 3.5" floppy disk formats, I seem to recall that the read/write heads performed differently in 1.44MB drives than 720KB drives. (I don't remember what the specifics are--width of tracks, current used, etc.)

  Thinking about it now, however, it seems that if you cover the 1.44MB disk sensing hole (its not a write protect hole!) and reformat the disk on a 720KB system, I am guessing that would be safer than using the disk with the 1.44MB format. (Not sure exactly what was being suggested.)

  Also, while fans of the Atari ST might extoll its virtues, I am not sure buying one is the best advice to get CZ sysex data transfers working. Assuming the problem is not with the CZ itself, a midi interface that does the job would probably have many more uses than an Atari ST. And once that's working, there is Atari ST software that runs under STeem [Atari emulator].

  Steve 


  --- In CZsynth@yahoogroups.com, Daniel Forró <dan.for@...> wrote:

  [snip]

  > P.S.: Maybe it's a good custom to erase unnecessary texts when
  > quoting previous messages. Maybe there are some colleagues who 
  > use daily digest and then it's almost unreadable.

  [snip]



  
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