.dsk to .rom, is possible ?

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By psakhis

Supporter (2)

psakhis's picture

09-04-2004, 15:20

Hello,

i have a monitor arcade, and i want run mess with floppy disks, but i'm not sure
mess runs .dsk, but .rom runs with no problem, exists any converter ?

thanks all!

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By anonymous

incognito ergo sum (109)

anonymous's picture

09-04-2004, 15:38

no

By snout

Ascended (15187)

snout's picture

09-04-2004, 15:51

Heh.. that must be the shortest answer ever. Indeed, DSK and ROM are two entirely different things. You can't just get a DSK file, do some magic with it and then end up with a ROM file. Neither will it work the other way around. (Although you can use a ROMloader and run .ROM file from disks).

I suggest you use another emulator loke BlueMSX, NLMSX or openMSX to get those DSKs working. If you want to use MESS (and as you are running a 'monitor arcade'), I assume you will... contact the developers of MESS and let them know you'd like to see improved FDD emulation.

By Arjan

Paladin (714)

Arjan's picture

09-04-2004, 16:08

in theory, it's possible. You could capture the BDOS calls and instead of reading from disk, your read everything from the virtual disk on the ROM. So you could convert a 720kB disk to a 1MB ROM in theory, but it might not work will all the game since you don't know anything about the memory usage of the games.

an easier solution is to install an MSX emulator such as NLMSX, openMSX or blueMSX, or get a real MSX Smile

By snout

Ascended (15187)

snout's picture

09-04-2004, 16:12

Getting DSK to ROMs will also give some problems when you'd want to save something Wink

By Arjan

Paladin (714)

Arjan's picture

09-04-2004, 16:22

of course something could be done like having a certain key pressed during 'disk' access to access a real disk.

By snout

Ascended (15187)

snout's picture

09-04-2004, 16:27

The problem psakhis (and a bunch of other potential MESS users) is having is the fact that it's very hard to get DSK images working in MESS. Wink

By Arjan

Paladin (714)

Arjan's picture

09-04-2004, 16:37

Yeah but he's not asking how to get dsk's to work in MESS, but how to convert them Smile Since there is no dsk->rom convert I suggest to use another emu.

By anonymous

incognito ergo sum (109)

anonymous's picture

09-04-2004, 17:43

Getting DSK to ROMs will also give some problems when you'd want to save something Wink
Not only that, but what about the problem of RAM variables Tongue Disk games run from RAM, so variables are all over the place. Coding for ROM is very different.
It's impossible.

By anonymous

incognito ergo sum (109)

anonymous's picture

09-04-2004, 21:07

As a matter of fact, KOEI 8Mbit ROMs are disk images embedded into the ROM with a patched BDOS allocated on page 0.

If you take a look with a HEX editor you will see even the boot sector of the disk.

Furthermore, I've converted some DSK games to ROM without patching or editing the original DSK game. The only thing i made was creating a fake diskrom with sector-to-rompage conversion routines and a fake environment.

By SLotman

Paragon (1215)

SLotman's picture

10-04-2004, 03:30

How exactly does THAT works?
It would be really cool to run some disk programs as ROMS, and much faster also =D

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