77-track "Japanese style" disks

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mr.vince
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77-track "Japanese style" disks

Post by mr.vince » Wed Jun 01, 2011 7:13 am

Drive speed is irrelevant for KryoFlux. The drive speed detected during imaged is saved as metadata and can be translated to any other drive speed during conversion. So no need to solder or modify. :)

clemfm
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Re: 77-track "Japanese style" disks

Post by clemfm » Tue Jul 19, 2011 12:23 pm

Has an -e77 option been implemented as yet?

Can DTC create an image from these drives that will work with a http://hxc2001.free.fr/floppy_drive_emu ... SSUPPORTED emulator?

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mr.vince
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Re: 77-track "Japanese style" disks

Post by mr.vince » Tue Jul 19, 2011 12:56 pm

Which drives do you mean?

clemfm
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Re: 77-track "Japanese style" disks

Post by clemfm » Tue Jul 19, 2011 1:00 pm

From the first post in this thread "there are several Japanese computers (X68000, PC-98xx, FM Towns...) that use a certain disk format with 77 tracks, 8 sectors/track and 1024 bytes/sector (which I believe was based on the IBM 8" HD format)."

For example, the Mitsubishi 4854's (Incidentally I have the manual for these drives)

Jeff_HxC2001
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Re: 77-track "Japanese style" disks

Post by Jeff_HxC2001 » Tue Jul 19, 2011 9:36 pm

clemfm wrote:Has an -e77 option been implemented as yet?

Can DTC create an image from these drives that will work with a http://hxc2001.free.fr/floppy_drive_emu ... SSUPPORTED emulator?
Hi,

you can use the "load raw image" function to load DTC raw file image.

clemfm
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Re: 77-track "Japanese style" disks

Post by clemfm » Mon Sep 26, 2011 11:56 pm

This topic is active again here viewtopic.php?f=4&t=56&p=1921#p1921

clemfm
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Re: 77-track "Japanese style" disks

Post by clemfm » Thu Sep 29, 2011 4:39 am

Jeff_HxC2001 wrote:
Hi,

you can use the "load raw image" function to load DTC raw file image.
As the raw images are 80 tracks, even for 77 track disks (with 3 tracks "padded" with 1/0etc) what happens with the HxC2001 when the attached system expects 77 tracks only?

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IFW
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Re: 77-track "Japanese style" disks

Post by IFW » Wed Jun 27, 2012 12:44 pm

This will be supported by the upcoming beta: remove tracks below and above the selected limits from the output file.
Additionally, the complete ordering of tracks in the output file could be changed.

Code: Select all

-oo<ord>: output image track order, add values to define ord (default by image)
          1=side 0 descending (side 0 ascending if 0)
          2=side 1 descending (side 1 ascending if 0)
          4=side 1 then side 0 (side 0 then side 1 if 0)
          8=side oriented (track oriented if 0)
-os<trk>: output image start track (default by image)
-oe<trk>: output image end track (default by image)
So hopefully even the weirdest sector image combinations can be produced :lol:

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IFW
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Re: 77-track "Japanese style" disks

Post by IFW » Mon Jul 09, 2012 11:35 pm

This is available now :-)

clemfm
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Re: 77-track "Japanese style" disks

Post by clemfm » Tue Feb 19, 2013 7:04 am

I've finally had a chance to plug in my 5.25" 77 track 1024 96TPI (Mitsubishi M4854) drive.

1. Calibration reports 82 tracks?
- I'll use the -e76 option.

2. I seem to get and error on the first sector from 3 disks (I'm going to try my spare drive).
- I had an unmarked jumper linked (below HL & not in drive manual), when I remove this I can read disks.
- Drive 0 is selected on the drive, however this appears to require Drive 1 to be set in the GUI or DTC, no doubt due to the varying methods of drive selection available i.e. original DS0 etc and twisted leads etc

3. I've just successfully tried:
$ dtc -ftest.raw -v360 -z3 -e76 -d1 -i2
- initially when I had the switches in an unacceptable order, I received an error stating that with an -i2 image, the sector size could not be changed. Changing the switch order allowed -z3 i.e. 1024

4. I've used any old floppy (DSDD 40 track I suspect) to test, shouldn't I see a lot of errors when trying to read 77 tracks 1024 etc?
Last edited by clemfm on Tue Feb 19, 2013 12:26 pm, edited 3 times in total.

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