Difference between MSX SD Mapper & Megaram 512Kb and the MegaFlashRom with 512k?

The cartridge you linked appears to be a sd card reader + memory mapper + megaram. More info about megaram here https://www.msx.org/wiki/Category:Megaram_Cartridges Perhaps ask the seller for info about the exact workings. Like whether you can use the megaram and memory mapper at same time or maybe you can just use either.

The megaflashrom scc+sd+mapper has sd reader, memory mapper, scc+ (and afaik a PSG) in fpga form and flashrom. More info about flash cartridges here https://www.msx.org/wiki/Category:Flash_Cartridges

Megaram and mapper can't be used simultaneously, there's hw switch. Btw, that's the same one as Tecnobytes' - the item description refers to Belavenuto

Why not buy a gr8net? This has all fuctions included

I made a wiki page for this Interface. Megaram option is almost useless on many MSX1 and very limited on MSX with 64kB. 8bit4ever version seems better than Fratal2000 and cheaper.

@gdx

I would like to politely ask you to stop including misinformation in the MSX-Wiki. If you're not sure, please open a thread beforehand here in the forums, ask questions, and only then proceed to create a reliable Wiki article.

You should have known that, given that the SD-Mapper is an open source hardware, many different people can build the same design, or build derivative designs. And all of them will have a lot of shared characteristics because of this.

It's not different from Linux distributions. You wouldn't go write reviews about a given Linux distribution just because other distribution has some characteristics you don't like.

For example:

• You wrote that Fractal2000 is Fabio Belavenuto. But he's Daniel Ravazzi.
• You posted incorrect pictures on the Wiki.
  
  • Fractal2000's SD interface has a black PCB with gold-plated contacts and not a blue PCB with tin-plated contacts.
  • Also, Fractal2000 never made SD-Mappers with crystal clear shells.
  • Fractal2000's SD-Mapper labels are professionally printed on glossy paper. The one featured in the label is inkjet printed on plain paper and has square markings in the corners.
• Fractal2000's disk interface has gold-plated contacts too, and not tin-plated contacts as you wrote
• You wrote about the MegaRAM feature form a very negative point of view, when in fact it's meant as a bonus for when the user's machine already has an internal memory mapper, since two mappers on the same machine would be less useful than a mapper and an external MegaRAM.
• You wrote that the SD-Mapper supports up to 4GB cards, when in fact it supports SDHC cards up to 32GB.

IOW, there are many different people building SD-Mappers nowadays. These are some of the makers I know, but there are others: Fractal2000, PalMal, Luis Luca, 8bits4ever, etc.

SD-Mappers can be produced at a smaller cost than other mass storage interfaces because:

• There are no project amortization costs, since Belavenuto and MSXpro kindly made the designs available for free
• The design is very smart and was created under the same philosophy of the MSX: obtain the best possible results from very simple off-the-shelf components.

I know all of this can be quite confusing, and I already suggested Fractal2000 to produce his SD-Mappers with his own custom label (instead of the default label included with the project, that was also a contribution from a community member) to differentiate his interface from the others.