Weird copper bugs when zoom=auto [Solved]

geir · 03 May 2015, 18:02

Hi.
I'm experiencing some weird bugs with a simple copperbar test.
It's just a simple copperbar where vertical position is updated each frame. See source below.
The screen seem to stop update for several frames.
The strange thing is that it only bugs wheen Zoom mode is at auto. When I switch to other zoom modes (F11) it works fine, but back on auto the bug is back. In the console debugger I can see that the copperlist looks fine.
Here's a [ Show youtube player ] of the output.

The test source (system init/exit in a separate file):

Code:

		section code,code
start:

		lea	$dff000, a6
		move.l	#clist,$80(a6)
		clr.w	$88(a6)
		move.w	#$8280,$96(a6)

.movloop:
		bsr	WaitRaster
		lea	pos,a0
		move.b	(a0),d0
		add.b	#1,d0
		move.b	d0,(a0)
		add.b	#8,d0
		move.b	d0,8(a0)
		cmp.b	#$e0,d0
		bne	.not
		move.b	#$10,(a0)
		move.b	#$18,8(a0)
.not:
		btst	#6,$bfe001
		bne	.movloop
		rts

;--------------------------------------------------------------------

		section data,data_c

clist:
pos:		dc.w	$1007,$fffe,$0180,$0fff
		dc.w	$f007,$fffe,$0180,$0000
		dc.w	$ffff,$fffe

Any known bug, or anything I've forgotten to do?

geir · 03 May 2015, 18:14

Nevermind. I obviously hadn't read the manual thoroughly enough...

03 May 2015, 18:14	#2
geir Registered User Join Date: May 2015 Location: Tonsberg / Norway Posts: 12	Nevermind. I obviously hadn't read the manual thoroughly enough... Last edited by geir; 03 May 2015 at 18:19.

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03 May 2015, 18:02	#1
geir Registered User Join Date: May 2015 Location: Tonsberg / Norway Posts: 12	Weird copper bugs when zoom=auto [Solved] Hi. I'm experiencing some weird bugs with a simple copperbar test. It's just a simple copperbar where vertical position is updated each frame. See source below. The screen seem to stop update for several frames. The strange thing is that it only bugs wheen Zoom mode is at auto. When I switch to other zoom modes (F11) it works fine, but back on auto the bug is back. In the console debugger I can see that the copperlist looks fine. Here's a [ Show youtube player ] of the output. The test source (system init/exit in a separate file): Code: section code,code start: lea $dff000, a6 move.l #clist,$80(a6) clr.w $88(a6) move.w #$8280,$96(a6) .movloop: bsr WaitRaster lea pos,a0 move.b (a0),d0 add.b #1,d0 move.b d0,(a0) add.b #8,d0 move.b d0,8(a0) cmp.b #$e0,d0 bne .not move.b #$10,(a0) move.b #$18,8(a0) .not: btst #6,$bfe001 bne .movloop rts ;-------------------------------------------------------------------- section data,data_c clist: pos: dc.w $1007,$fffe,$0180,$0fff dc.w $f007,$fffe,$0180,$0000 dc.w $ffff,$fffe Any known bug, or anything I've forgotten to do? Last edited by FrodeSolheim; 16 May 2015 at 11:40.

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