Futuredisk broken MBM's

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By Hydragon

Paladin (717)

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10-08-2019, 22:08

MBMPlay 1.0 hasn't been officially released by BiFi yet, so you'll have to wait for that though.

By sdsnatcher73

Paladin (989)

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12-08-2019, 21:05

Still in the process of collecting all songs...
In the mean time I’ve created two PC tools to show info on MBM and MWM files:
https://bitbucket.org/peterhanraets/mbminfo/src/master/
https://bitbucket.org/peterhanraets/mwminfo/src/master/

By sdsnatcher73

Paladin (989)

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21-11-2019, 20:25

So I finished (with some help, thanks again) what I now call MoonBlaster Music Collection. It contains all FutureDisk songs but a lot more as well. It's all old stuff and I don't think anyone is still 'making money' on the magazines, games or demos the songs originated from and I am not be able to ask every original composer/group for permission. But I do want to say that if anyone wants to have certain songs removed from the collection just contact me through my profile page and I will update the collection.

By knm1983

Champion (489)

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21-11-2019, 21:17

Guauuu thanks a lot Wink

By Arjan

Paladin (717)

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13-05-2020, 10:26

sdsnatcher73 wrote:

So on FD38 the MWM's are compressed, but I don't recognise the compression format. Anyone who does?

In case you're still wondering: On FD38 and up, MWM files for the magazine part were compressed using POPCOM. Also, some other utility was used to do some postprocessing but I don't have that tool anymore... I don't really remember the purpose of that tool, but I guess all it did was remove some excess data at the end of the compressed file (POPCOM is a CP/M tool and file sizes were rounded up to multiple of 128 bytes IIRC)

By sdsnatcher73

Paladin (989)

sdsnatcher73's picture

13-05-2020, 12:38

Arjan wrote:
sdsnatcher73 wrote:

So on FD38 the MWM's are compressed, but I don't recognise the compression format. Anyone who does?

In case you're still wondering: On FD38 and up, MWM files for the magazine part were compressed using POPCOM. Also, some other utility was used to do some postprocessing but I don't have that tool anymore... I don't really remember the purpose of that tool, but I guess all it did was remove some excess data at the end of the compressed file (POPCOM is a CP/M tool and file sizes were rounded up to multiple of 128 bytes IIRC)

I managed to retrieve the MWM’s from RAM using openMSX savestate IIRC. So all files were recovered. But still POPCOM seems to be for compressing COM files which remain executable after compression (I remember something similar existed for MS-DOS). What I therefore don’t understand is how POPCOM was used on MWM files.

By The_Engineer

Master (168)

The_Engineer's picture

13-05-2020, 12:41

The other tool you refer to was POPOPTIM.COM and your memory of what it does is correct:
POPCOM was a tool to pop (i.e. compress) your .COM file to generate a smaller .COM file on disk.
The idea was that disk loading of a file took more time than loading a smaller file and decompressing the original in memory.
The resulting .COM file always included the pop decompress code.
The POPOPTIM.COM tool removed the decompress code and adjusted the header to "PC" followed by the 16 bit length of the uncompressed file.

I was introduced to POPCOM.COM by Zelly and mth from Mayhem in late 1994.
From late 1994 onwards many files on the FD would be compressed with POPCOM.COM and optimized with POPOPTIM.COM.

By Arjan

Paladin (717)

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13-05-2020, 15:44

Ah yeah, a tool to remove the decompression code, that's what it was. I made my own tool for that though.

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