I am looking for back up disk for SEGA GAIN GROUND

[arkadia74]

Hi

I am drkitty,looking for back up disk for SEGA system 24 GAIN GROUND (317-0058-03C,3p,world version)
Unfortunately I lost original disk,cannot play the game any more.
Other region disk(JAPAN/US ver) does not work on my pcb.Need only world version.
Does anyone has this version??
Please help me.

I am willing to pay for the back up disk.
Please contact me freely if you have the version.
Thanks for reading.

[system11]

The gground.zip MAME set contains the disk image, then you need something like rawrite or another PC tool for writing raw floppy disk images.

[arkadia74]

Hi

It is not impossible to copy mame image with pc.
blank disk 1.44M byte.
mame image 1.8M byte.

No one can not copy the mame image into blank disk.


Thank you.

The gground.zip MAME set contains the disk image, then you need something like rawrite or another PC tool for writing raw floppy disk images.

[Ed Oscuro]

Hi there, here's some information on the disk:
http://forum.kryoflux.com/viewtopic.php?f=4&t=194

There seems to be some confusion about whether 1.8MiB file size is a barrier or not. I agree it looks like a problem - it's not something that most floppies achieve in normal operation...or even in a different selected mode (like 1.3MB floppy, or 720K format as in a MSX).

[system11]

Hi

It is not impossible to copy mame image with pc.
blank disk 1.44M byte.
mame image 1.8M byte.

No one can not copy the mame image into blank disk.


Thank you.

1.44m is the size of a *formatted* floppy disk, that's with the Microsoft FAT filesystem on it. *unformatted* capacity is higher. The image is a proprietry format, you don't copy the image to a formatted disk, you write the image file over the disk as a bit level operation - hence using rawwrite or similar floppy imaging tool. You can see from photos of the game that the floppy used is a standard HD floppy.

[Ex-Cyber]

From the MAME driver:

Floppy Drive is a standard 1.44 High Density drive, but the controller is custom and the floppy disk format is custom. The floppy disk can be read with "Anadisk" depending on the PC being used and it's floppy controller. Most clone PC's can't read the System 24 floppies even with "Anadisk"[1]. But many brand-name PC's can. It's likely due to the propietry nature of the components used in brand-name PC's. Generally the older and crappier the PC is, the better chance you have of being able to read the floppy

[1] Actually, most can _except_ for the Hotrod disks. Those 8K sectors are deadly.

The image is a proprietry format, you don't copy the image to a formatted disk, you write the image file over the disk as a bit level operation - hence using rawwrite or similar floppy imaging tool. You can see from photos of the game that the floppy used is a standard HD floppy.

rawrite images only contain sector contents, not formatting information. The write is only "raw" in the sense that it bypasses the filesystem; it still depends on the image being for a supported format.

[arkadia74]

To system11 & ex-cyber.
Thanks for great info.

If I do as followings,Can I get a wroking GAIN GROUND disk?
1.Not format brand new disk.
2.Copy the image(1.88M) with "rawwrite" tool.


Thanks again.

Hi

I am drkitty,looking for back up disk for SEGA system 24 GAIN GROUND (317-0058-03C,3p,world version)
Unfortunately I lost original disk,cannot play the game any more.
Other region disk(JAPAN/US ver) does not work on my pcb.Need only world version.
Does anyone has this version??
Please help me.

I am willing to pay for the back up disk.
Please contact me freely if you have the version.
Thanks for reading.

[kebrank]

I would tell you how to do it but I don't read the forums. PM on ebay

\o/.k.

[arkadia74]

To system11

It was wrong info.
I found out can not burn mame image with Rawwite.
rawwrite does not support unformatted(2.0M) disk.
I failured to make a disk for actual system-24 board.

Anyway, I appreciate your advice.

Hi

I am drkitty,looking for back up disk for SEGA system 24 GAIN GROUND (317-0058-03C,3p,world version)
Unfortunately I lost original disk,cannot play the game any more.
Other region disk(JAPAN/US ver) does not work on my pcb.Need only world version.
Does anyone has this version??
Please help me.

I am willing to pay for the back up disk.
Please contact me freely if you have the version.
Thanks for reading.

[kebrank]

So you don't read the forums, right? Only ebay, hahahaha

[system11]

Hm, shame. I would use Linux and just cat <file> > /dev/fdXXX (not the exact command) myself, but I don't own any machines with a floppy drive to test this on.

[papa_november]

RawWrite won't work. You need something with direct floppy controller access, as well as exact info on the floppy's custom geometry. (System 24 uses non-standard track and sector counts to squeeze 1.8MB onto a standard high-density floppy; the drive/controller hardware itself isn't particularly unusual.) There may be DOS PC programs around that can do it, but you can't use a USB floppy drive. OmniFlop could work, especially if you are able to get in touch with the author and have the disk geometry. KryoFlux has no write support for the System 24 format, though I'm sure it can read it.

I would suggest contacting Charles McDonald, as he worked on the MAME driver and is likely to remember how to copy System 24 disks.