I used to redefine the character table for SCREEN 1 under MSX Basic when I made some games a lot of years ago, but now I don't remember anymore the starting address to VPOKE. Is there someone that can tell me which address I have to VPOKE to change the character table under SCREEN 1 ?

Also, anyone remembers which is the starting memory address to SCREEN 1 VIDEO MEMORY?

Thanks

Look here:
www.work.de/nocash/portar.htm#videodisplayprocessor

You can also check right addresses with BASE command in BASIC like this:

PRINT BASE(X)
The number X can be calulated like this:
SCREEN mode * 5 + Y

Y:
0 = Tile map
1 = Tile colors
2 = Tile outlook
3 = Sprite attributes
4 = Sprite outlook

... so ansfer to you guestion can be obtained by typing:
PRINT BASE(7)

Thank you very much

or call your sprite "dennis"... then you redefine him too