Hi Samor, is your memory mapper from Padial ? Also, the NMS8250 is already sold, isn't it ?That cartridge seems to be AddRAM2 from Terra Network System. Nowadays they are very hard to find...
Better ask TNS, but I think that it does support R800. If I remember well AddRAM2 was a revision of the first version of the hardware (AddRAM) with enhanced compatibility for turboR. And the users manual says "for MSX/2/2+/MSX turboR".
The case is exactly the same. AddRAM2 doesn't have a sticker, too. Maybe it could be AddRAM1... Ask the seller! The PCB should be very similiar to the one on the top of Takamichi's webpage dedicated to AddRAM.
I bought it exactly like you can see it on the auction. The only thing that was mentioned was that it was 4MB in size, which is correct, and yes, the size of the cart is like a regular cartridge.
It does seem to be the same one as in the link Ivan posted.
