vdp_control				equ 0x00C00004
vdp_data				equ 0x00C00000

vdp_write_palettes		equ 0xF0000000
vdp_write_tiles			equ 0x40000000
vdp_write_plane_a		equ 0x40000003
vdp_write_sprite_tiles	equ 0x60000000
vdp_write_sprite_table	equ 0x60000003