SD-Mapper big doubt

By spawnerbr

Supporter (1)

spawnerbr's picture

22-01-2017, 01:42

I connected my SD-Mapper on my MSX1 and I have tried to run some MSX1 games from the SD card like a Disk Drive. From 10 games, only 1 worked. I have tried the SD-Mapper in Mapper, Megaram and Disabeled mode. So, I connected my Floppy interface and all 10 games runs perfectly. When I create a DSK from this games and use Sofarun, the games runs. Why the SD-Mapper don't support to load the games from the SD as a Hard Disk?

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By Fabio Belavenuto

Rookie (17)

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24-01-2017, 12:27

Hi, SD Mapper uses Nextor:

http://www.konamiman.com/msx/msx-e.html#nextor

I have not had and I do not know of any such problems, but some Nextor system experts can help.

Please give us some of these games for further testing.

By Piter Punk

Master (223)

Piter Punk's picture

26-01-2017, 02:39

Hi spawnerbr,

The problem isn't with the SD-Mapper or with Nextor, the problem is with the games. There are many games (a ton of those adapted from ZX Spectrum) that have problems with:

  1. RAM in a subslot
  2. MSX-DOS2

Using the SD-Mapper you hit both problems: it have an internal slot expander, so the game will run in a subslot and Nextor is created from MSX-DOS2, so it heirs all the incompatibilities that some games have with MSX-DOS2.

As you said in your post that the games runs OK when running from DSK, probably those games have problem with MSX-DOS2. When running the game from DSK it runs under MSX-DOS1.

You can try to use RUNDOS1, or press "1" while your MSX is booting (this will make Nextor boot in MSX-DOS1 mode). Remember, MSX-DOS1 doesn't have native support to subdirectories, the game files needs to be at the root directory or you need to use the external MKDIR/CHDIR/RMDIR commands.

Another point: many of those "bad" games have versions with corrected binaries/loaders in the internet, you can search for them. Can you provide a list of games that you're having problems to load in SD-Mapper?

By tvalenca

Paladin (747)

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26-01-2017, 17:07

Look! 4 brazilians talking in english! Running Naked in a Field of Flowers

By l_oliveira

Hero (531)

l_oliveira's picture

26-01-2017, 20:36

Five now, my good sir. Cool

By Fabio Belavenuto

Rookie (17)

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31-01-2017, 15:57

Quebrei o ciclo, heheheh