> >> Definitely the thing existed:
> >> http://page3.auctions.yahoo.co.jp/jp/auction/c22474394
>
>
> MSX1->MSX2 upgrade cartridges were common in Brazil. The first one
available was
> created by Ademir Carchano.

The first CARTRIDGE upgrade was the NEOS (above), in 1986 I think. Ademir
created first the internal "Kits" for upgrade. And an MSX2+ expansion with
FM in 1992 (in only 1 cartridge). And they are not common, even in Brazil.


> The cartridge itself has a 9938. You could cut off the wires of
>
> 9918, but in machines like Expert DDPlus, that uses MSX Engine chip, you
> couldn't do it. So, the cartridge have the 9938 at ports 88h/89h/8Ah.


The cartridge has de V9958 and is recommended remove the MSX1 VDP and ROMs
to work fine. Works fine in Expert and Hotbit, but I didn't tested it on
others MSX1 computers.


Best regards for all,
Daniel Ravazzi

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