OldComp.cz

I hoped you could dump the disks directly from a PC.

TD0 is created with Teledisk, IMD with ImageDisk.
For DSK (EDSK) format you could use SamDisk or DskTool.
Otherwise AnaDisk should work too.
Most of the tools are for MSDOS, using windows can be a problem, at least a special driver is usually needed.
Disk dumps done in this way usually preserve the original sector numbering, etc..

If you have SCL or TRD, it can help but they usually are linear dumps. Perhaps the SCL one still has some information.

I am not sure if it will be even possible to image real floppy (after nearly 30 years), at this moment I dont have any MSDOS machine working...

SCL format is even more simplified then TRD format, it stores only headers and file-data, no track/sector info, image must always be 256 Bytes per sector and both are linear dumps for easy emulation

therefore I was never able to use LEC/CPM for Betadisk in any emulator

Install disk for LEC/CPM in TRD format - instalation is in Czech language only ! -> it will create Bootable floppy and format it.
to run this CP/M you need expanded memory paged on port $FD (minimum is 80kB), Betadisk modified as in magazine Mirobaze 8/89
This BIOS supports up to 1040kB RAM and 512kB ROMdisk

Well if those disk images can't be managed by Teledisk, ImageDisk or similar tools it makes no sense to create an accurate image: it wouldn't be writable!

TRD or SCL would be fine
TRD or SCL would be fine.
adly I'm not aware of emulators supporting both the

Sorry for the previous post, problems with the phone.
Thank you for the file, I'll try to squeeze out something from it.

i think it could be possible to create the image artificialy/manualy, but there will be no use for it... there is no emulator to use that kind of image

I see. In many other cases the old computer owners are transferring their program using floppy disks. Considering that the tape format was considered useless, I'm wondering how a COM file is sent to the Spectrum, then?

Via gotek, it’s super easy.

As 100k described, there is a bit problem with betadisk's CP/M floppy format but not in all cases. The system disk has the first two tracks in TR-DOS format and remaining ones in CP/M. So in this case you need to use Gotek's "HFE" image format but it's hard to work with it on PC. But disk without system (non bootable) is different because the first two tracks are empty. They are reserved as well, but because you can ignore them, you can use simple "IMG" binary format for storing floppy image and so it's easy to work with it and transfer files into this image via some utility like (my favorite) CIM, https://pmd85.borik.net/wiki/CP/M_Image_Manager. For Betadisk's CP/M you can use this IMG definition:

[IMG]
SPT=72
XLT=0
BLS=2
EXM=0
DSM=350
DRM=127
OFF=2


And in attachment you can find two examples, HFE and IMG images with several basic CP/M files, both in Betadisk's CP/M format (HFE is bootable but I don't use it for file transfer, it's just an example).

Wonderful, that's what I was looking for !

Just a naïve question because I don't understand the original problem and never had to deal with CP/M.
Is this the intended image structure? (seems like a hybrid of TR-DOS and something else)

_________________
より良い競争相手からソフトウェアを購入する (｡◕‿‿◕｡)
Ďábel se skrývá v detailu (staré technické rčení)

in short... the problem is that all emulators support TRD/SCL files for Betadisk, there is no emualtor to support images as on your picture. (second problem is support of LEC memory expansion...)

šlo o to, že když dělali to CP/M pro betadiskáře (J.Lamač + později D.Meca) tak zvolili značně nestandardní řešení nejméně ve 3 případech.
1. rozšíření paměti (koliduje s AY)
2. úprava originálního HW Betadisku (umožnění přístupu k jeho portům) - rusáci toto řešili jinak, přidali si rutiny do TRDOSu.
3. velmi speciální formát disket kde jak vidíš první 2 stopy jsou standard Betadisk and zbytek je PC formát

toto dohromady nepodporuje žádný emulátor
celkově CP/M na Spectru v době kdy se to začalo propagovat (1990/1991/1992) už nedávalo žádný smysl a i díky rozlišení obrazovky se to nijak extra neuchytilo
co mohlo být zajímavé a po pádu Mikrobáze se nijak už nedostalo mezi lidi, že Lamačovo CP/M podporovalo až 1040kB RAM (já mám jen 272kB verzi) a i 512kB (EP)ROM jako disk - což měl asi jen autor a jeho blízké okolí.

That's exactly as you say. The first two tracks are in TR-DOS format because TR-DOS ROM needs to boot CPM from them in its native format and remaining 78 tracks are in very common (in PC world) physical format 9 sectors/track for CPM.

What is your plan? To boot this CPM in an emulator? Or something else?

Thanks both for the explanation!

If that regards me, I have no further plans with the image. I'm just trying to open everything that I come across here at OldComp, searching for bugs and incompatibilities in my application

_________________
より良い競争相手からソフトウェアを購入する (｡◕‿‿◕｡)
Ďábel se skrývá v detailu (staré technické rčení)

I will try to find some betadisk/CP-M floppies if there is anything worth to play with this special format... there could be possibility to show not only TRDOS directory listing but also CP/M directory/file listing in RIDE