2
DEFC SpriteSet = 0 ; 0 for sprites to use tiles 0-255, 1 for 256+
3
DEFC NameTableAddress = $3800 ; must be a multiple of $800; usually $3800; fills $700 bytes (unstretched)
4
DEFC SpriteTableAddress = $3f00 ; must be a multiple of $100; usually $3f00; fills $100 bytes