Well, it would be easier if you write down the mounting command(s) used.

This is quite an old thread, however i find myself over 5 years later facing the same issue. This time I am more prepared though! hah.

I have an A: mouunted as:
mount a .\games\FatmanTh\floppy\ -t floppy

There is no actualy floppy drive in the computer to mount, so i am attempting to get dosbox to think a specific folder is the A: (which works all the time when installing games that want to be installed from floppy).

Within dosbox it reports the folder size as 1.44mb, which is the same as a 3.5" HD disk.

When I start up teledisk, I choose FILE to DISK, and it tells me "Wrong Drive Type - Can't put 3.5" high-density image on a 5.25" low-density drive!"

So my issue is trying to get teledisk to view the mounted floppy drive as a 3.5" HD drive.... I have done some searching on the mount command, however beyond simply identifying the mounted folder as a floppy, I'm not seeing any further modifiers.

If I remember correctly, the commonly available copy of Fatman used oversized disks that can't be extracted by DOSBox, anyway.

I think DOSBox's floppy drive emulation is too limited to allow Teledisk to do whatever complex operations it is trying to do. You might have better luck using imgmount and/or booting MS-DOS within DOSBox first.

Jorpho wrote:

You might have better luck using imgmount and/or booting MS-DOS within DOSBox first.

IMGmount doesn't work with teledisk Images, Just tried and it made DosBox crash. Afaik the only emulators that support teledisk is MESS and PCE. PCE is a difficult to set-up the first time, MESS isn't that difficult, but the commands can be, if you don't use QMC2. But with MESS you'll be able to get the files of a teledisk image.

I know Teledisk images don't work with imgmount, but I understood that the OP is trying to run the Teledisk disk-writing application in DOSBox. An imgmount-mounted image can offer more complete floppy emulation than mount with "-t floppy".

just use wteledsk to convert the td0 to img, and then you can mount the floppy image.

In the case of Fatman, that's sufficient - the 1.48Mb reference in the nfo is completely bogus, because they're completely regular 1.44Mb images.
However, the installer will fail to run because you can't switch floppy images. You could try to install it under VirtualBox but that won't work, either, because VirtualBox shows 639kb of memory, and the installer wants 640kb. Even after fixing that, it will still fail because of an unsupported hardware behaviour that the installer expects (a read failure on first access to a changed floppy disk). But if you manage to fix that problem, then the installer runs just fine. :-)

Most of teledisk includes non standard track/sector.
It can be accessed via INT-13 FDC emulation.
But DOSBOX doesn't support this.

PCE (IBM PC 5150) emultor supports Teledisk and copy protected track/sector correctly via INT-13.

While it's true that PCE supports uncompressed (i.e. not Advanced Mode) TeleDisk images, that support isn't going to help you if the game you want to play needs a 286 or later CPU.

I've checked all copy protected IBM PC games from my package.
(over 300+)

All copy protected games are run on 8086/8088 based CPU.
(A few of games needs 8086 (Not 8088) or PCjr and Tandy 1000.)

Of course a few of games recommend to run 80286 or higher, but not
minimum.

But if any games runs on 80286 or mininum, there is no floppy copy protected game.

PCE doesn't support Teledisk's compressed format.
But I think it is not so important.
I've dumped all my copy protected games by Teledisk or Copy II PC Deluxe Optionboard (*.IMG)
All of games runs on PCE correctly except 1 or 2 games which includes special copy protection just like Laser burn hole.

For example, another emulator supports normal or cracked image.
But PCE doesn't have to crack copy protected image.

Disk-based copy protection gave way to document-based over time. I think that the majority of disk-based copy-protected games would at least run (if slowly in some cases) on a 8086/8088 system, but I would hesitate to say "all" of them. For example, if MobyGames is to be believed, Yo! Joe! Beat the Ghosts is 80286 minimum, and it does not seem unreasonable for a 1993 VGA scrolling platform game that plays digital tracker (MOD) music.

I heard that a few of 3.5" games can't be installed correctly.
But I don't know it is related with floppy copy protection.

I've never heard about "Yo! Joe! Beat the Ghosts".
But the game seems to be interesting.

According to my package, many of early PC games can't be dumped by Teledisk. (Example, Electronic Arts Super Lok)
It can be dumped by Option board or Kryroflux (maybe).
The dumped image file from option board can be convered to PCE's .pfdc with copy protected sector.
It can be run on PCE without crack or modified image.
No emulator exists to support floppy copy protection just like PCE.

PCE's advantage than other emulator is no need to crack the diskimage.

Of course I know it is not so easy to believe this fact.