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Author Topic: PC formatted 5.25 disk drive mountlist - help, please  (Read 2945 times)

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Offline robo-ant

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Re: PC formatted 5.25 disk drive mountlist - help, please
« on: February 16, 2008, 11:40:45 PM »
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Anyone have something like this?
Or should the standard PC1 mount list work for 5.25 disk drives as well?


This is the mountlist that I used:

/* CrossDOS file system entry for 5.25" drive.
 */

FileSystem     = L:CrossDOSFileSystem
Device         = mfm.device
Unit           = 2
Flags          = 1
Surfaces       = 2
BlocksPerTrack = 9
Reserved       = 1
Interleave     = 0
LowCyl         = 0
HighCyl        = 39
Buffers        = 5
BufMemType     = 0
StackSize      = 600
Priority       = 5
GlobVec        = -1
DosType        = 0x4D534400


I had only a double-density 5.25" drive (Amiga A1020).

Be aware that this drive does not detect disk changes, so you have to issue 'diskchange' commands yourself!

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have anyone tested this mount list for C64 formatted disks if it works?


That's software for reading 1541 disks and making disk images.  It is not a mountlist.

Yes, it does work, but you have to change the rotation speed of the disk drive for it to work reliably.  IIRC, the instructions for doing that are included in the archive.  The software works well for reading 1541 disks after that (and CBM 2040 disks, too!) but MS-DOS disks are problematic then.

You cannot write to 1541 disks with this software.  1541 disks are tricky because the data rate is different on different tracks.

I experimented a bit with the rotation speed, and IIRC, the sweet spot for me was 283 rpm.  That allowed me to read Apple ][, C=1541, and Atari (forgot the drive model) disks into images well, and still be able to read MS-DOS disks.  Writing to MS-DOS disks at that speed often corrupted them.
 

Offline robo-ant

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Re: PC formatted 5.25 disk drive mountlist - help, please
« Reply #1 on: February 17, 2008, 12:13:17 AM »
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I have this 5.25 disk drive. And i have no clue to what it can/cannot do...


Cool!  It's a lot smaller than the Commodore 5.25" drive. :)

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When i insert a disk and close the lever the disk shows up on the desktop immediately. And when opening it the disk disappears from the desktop immediately... Is that disk change?


Yup.  My experience with 5.25" drives on Amiga is limited to the A1020, which didn't have this feature.  It looks like your drive is more Amiga-compatible than Commodore's own. :)