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Just out of curiosity, why do you need a 256 byte VDK header? Aren't the usual 12 bytes enough? Hi Roberto, I have three bat files to create VDKs that could be used with Drivewire, in this case the header length must be 256 bytes. But I have another three bats that simply add the 12 bytes header yo...

Hello Jon, I made the tests I promised. To be able to copy the original DSK files of the last NitrOS-9 version, I have added to them a 256 bytes VDK header with the geometry according to the VDK header rules, so that they are readable by DW4. Then I have copied the five disks (2x180k, 2x360k and 1x7...

Hi Jon, first of all, thanks a lot for sharing this wonderful piece of code. It is really very inspiring. I am sure that this would be the base to create a new dweeb to copy a single file from a VDK file into a floppy disk I have the Grosvenor DOS programmer's guide but had never used these special ...

Here's the relevant bit from one of the offending disks: 0000100: 0005 a012 00b4 0001 0000 1200 00ff add9 ................ 0000110: 0300 1200 0000 0000 0000 5806 0c11 0a50 ..........X....P These are the values found in the 'last version' of NitrOS-9 v3.3.0 for Dragon64: . . . . . . . . . . FILENAME...

Hi Tormod, this is the bat file I use to start XRoar without drives but wth Drivewire. ===================================================================== cd.. copy ..\XRoar\ROMs\d64rom1-dwload-becker-dragondos.rom d64_1.rom copy ..\XRoar\ROMs\d64rom2V31.rom d64_2.rom xroar -machine dragon64 -mach...

Hi Jon, it's fun to examine files searching for these bits and bobs. All of the disks 180k have $0002D0 as number of sectors and have offset $10 = 2 wich should mean Double density, but it is Single density, for sure! Disks type 360k have $0005A0 as number of sectors and have offset $10 = 3 wich sho...

thanks Jon, I will use this info for my V2FLO dweeb, but I am pretty sure that the physical disks must have right values in the three firts bytes because they cannot change of size! So if we have right now a problem with a floppy, probably there is something wrong in these three first bytes. I will ...

I have perused my PC folders in wich there are quite some OS-9 disks. All of the disks that are made to be used with a real Dragon or in XRoar, are DSK files that contain in offset 1-2 the number of sectors of the disk. But ... the ones ready to work with DW or with Becker (so, on the server side) h...

Hi Jon, first surprise, my NitrOS-9 DSK files have all of them these three initial bytes: $00 $48 $00 Whilst the 2 DSK I have (180k) that BOOT NitrOS-9, have these data: $00 $02 $D0 $02D0 means 720 sectors, so it is a single side single density disk (40 tracks x 18 sectors each) But $4800 equals 18,...

Hi Jon, I know there is a difference between double sided single density (360K) and single sided double density (360K too) but apparently they are treated right. The FLO2V dweeb knows the DOS disks and works with the OS9 ones looking to a few bytes. I will look at the source code and will copy here ...