Nice, you can update the Wiki if you like 
Done!
By the way, it seems the emulation of the VDP is not very accurate with openMSX (and yes... I know it's extremely complicated!). The real machine is adding the typical artifacts which happen when you write too fast, but... even in games that show fine with the 9918 or the T6950A! So probably the TMS9129NL has probably less access windows compared to his siblings. I can see clearly the difference with the border bars when loading a game.
Anyway, actually the NMS 800 is not even an MSX strictly speaking, so no need to dedicate much time on this 
Yes, but I'm not sure if it's exactly the same as the TMS9129NL.
Doing a grep all over the XMLs, it only finds occurrences in Frael_Bruc_100_2.xml, Philips_VG_8020-20.xml, Sony_HB-101P.xml, Frael_Bruc_100_1.xml, and Eurohard_Dragon_MSX.xml.
This is what I obtain with the emulator (left) and the real thing (right).
It should not be a tape-loading problem, since I'm doing it from my phone.
Well, if someone could try, say in the Sony HB-101P or any of that list, it'd be great to compare.
