Bleah! Do not expect nothing that is really useful from the crappy TMS VDP.
Even some undocumented modes that have some usefulness are plagued by some others side-effects that make them unusable as ARTRAG said
AFAIK, when only the pattern table is configured to be mirrored, the sprites will work fine. This can be used to allow double-buffering on screen-2, either for the name table or the pattern table.
The only disadvantage is that it doesn't work on the Toshiba T6950. I heard it wouldn't work on the Sega VDPs too, but never could check it.
Regarding openMSX and sprite clones, see this: https://github.com/openMSX/openMSX/issues/593
We never implemented it because the heating up effect could not be properly implemented. Well, as far as I remember... Still, it could be added for the proper VDP's. If someone bothers to implement it....
I would like to test a old MSX DEMO called "Alankomaat by Bandwagon" anybody in this forum can help me to get this demo because the link at Pouet is broken.
P.S.: I have tested the MSX Basic program listed at the beginning on my SANNO MSX with F18A VDP Upgrade (TMS9918 Compatible) and it not show the Sprites Cloning effect on the screen.
Does it mean that you are able to use all 32 sprites as happens in normal screen 2 mode?
If it is true, we can say "TMS VDP, so crappy that even clones can do better" ;-) GROAN. :-(
