[LaBodilsen]

Originally Posted by geldo79

Ok thanks, working now (see image). But, now i would be glad if somebody could explain this a bit to a dummy like me

What does the

        dc.w $0084,$0000,$0086,$0000

do? I guess these are the COPL2C/COPL2H registers. But why do i write 0 to them in my copperlist?

The 0 values, are only placeholders, they are not used, but gets replaced by the init code.

And how does this init work? How does the copperlist know where to jump?Where does the copperlist distinguish between Copper_Line1,Copper_Line9,Copper_Line17 ? I see that somehow, the addresses of my marks are written to the COP2LC/COP2LH registers here. But there is only one COPL2C/COPL2H....why does this work with more than one mark?

        lea.l	Copper_Line1-2,a0	
	move.l	#Copper_Line1,d0	
	move.w	d0,(a0)			
	swap	d0					
	move.w	d0,-4(a0)
	
	lea.l	Copper_Line9-2,a0	
	move.l	#Copper_Line9,d0
	move.w	d0,(a0)
	swap	d0
	move.w	d0,-4(a0)
	
	lea.l	Copper_Line17-2,a0	
	move.l	#Copper_Line17,d0
	move.w	d0,(a0)
	swap	d0
	move.w	d0,-4(a0)

This part replaces the 0 values in the copper with the actual adress values for the different jumps in the copper. eg. Copper_Line1, 9 and 17.

It works with more than one mark, because copl2c+copl2h is pressent 3 times in the copperlist, one time for each segment.


It works by:

-- Wait for firstline of segment --
        dc.w $2c07,$FFFE
-- load copper 2 address with values set by init (copper_line1) --
	dc.w $0084,$0000,$0086,$0000		

Copper_Line1:
-- Wait for horizontal start of segment --
	dc.w $003f,$80fe
-- Spam colors --
	dc.w $0182,$0000,$0182,$0000,$0182,$0000,$0182,$0000,$0182,$0001,$0182,$0002,$0182,$0003,$0182,$0004,$0182,$0005,$0182,$0006
	dc.w $0182,$0007,$0182,$0008,$0182,$0009,$0182,$000a,$0182,$000b,$0182,$000c,$0182,$000d,$0182,$000e,$0182,$000f,$0182,$000f
	dc.w $0182,$000e,$0182,$000d,$0182,$000c,$0182,$000b, $0182,$000a,$0182,$0009,$0182,$0008,$0182,$0007,$0182,$0006,$0182,$0005
	dc.w $0182,$0004,$0182,$0003,$0182,$0002,$0182,$0001,$0182,$0000,$0182,$0000,$0182,$0000,$0182,$0000,$0182,$0000,$0182,$0000
-- Wait for last line of segment, and if reached, skip the copper jump, else execute the jump  --
	dc.w $3401,$FF07
-- Jump to adress set in copl2c/copl2h (Copper_line1)
	dc.w COPJMP2,$0	

-- if skip was executed, Wait for for start of next line segment -- 
	dc.w $3407,$FFFE
-- load new address in cop2lc/cop2lh (copper_line9)-- 
	dc.w $0084,$0000,$0086,$0000		

:repeat for next line:

Edit: Ahh you understood a/b's post. but will leave this post here for future reference.