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Forums > CSDb Discussions > New VIC grey flickering dots with rastersplits
2018-01-02 20:09
Monte Carlos

Registered: Jun 2004
Posts: 263
New VIC grey flickering dots with rastersplits

Because i'm just considering some rastersplits for an upcoming part, i wonder if there has ever been technical analysis which difference in new and old vic causes these snowy pixels?
Or has this always been accepted as a non avoidable side effect?
 
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2018-01-03 10:21
Zer0-X

Registered: Aug 2008
Posts: 72
I'll blame it on the custom, faster, logic on the late model board vs the old board logic, letting VIC-II on the bus a wee bit earlier.

There's a simple fix (IIRC discussed on the forums before), but it will be argued if it could cause other problems.
2018-01-03 12:20
Monte Carlos

Registered: Jun 2004
Posts: 263
Thank you, i try to circumvent the issue by using some sprites to cover the splits. Think i have enough rastertime left.

Yes, rasterdemos should indeed be tested on new vic before the presentation to avoid surprises.
Still, i have been lucky as i did not do so much rastersplits.
2018-01-03 19:49
Devia

Registered: Oct 2004
Posts: 395
Quote: I'll blame it on the custom, faster, logic on the late model board vs the old board logic, letting VIC-II on the bus a wee bit earlier.

There's a simple fix (IIRC discussed on the forums before), but it will be argued if it could cause other problems.


Can't seem to find any mention of that, do you care to elaborate?

I only seem to remember messing with the XTal In or /RESET pins could toggle the grey dots on/off, although I suspect that method will likely cause other problems.

Also, touching øDOT appears in some cases to "reduce" the occurence of the dots.

@algorithm: No, once they have faded away, they will come back in my experience. It's is my experience that the occurence of the grey dots fades in and out at a very low frequency.. something like 30-40 mins duty cycle.
2018-01-03 21:44
Zer0-X

Registered: Aug 2008
Posts: 72
http://csdb.dk/forums/?roomid=11&topicid=78186&showallposts=1 for the old discussion.

And indeed, messing with the crystal / clock generator chip does affect the dots. You can also use freeze-spray on the VIC-II to make the effect fade in and out.
2018-01-03 23:27
Groepaz

Registered: Dec 2001
Posts: 8608
or just spray it on your balls for a similar effect
2018-01-04 02:18
The Phantom

Registered: Jan 2004
Posts: 353
I used put LDA #$00 and STA $0646, STA $d020 and STA $d021 at the very start of my code back in the day to stop the dots.

I don't know if that still works, just thought it was worth a mention.
2018-01-04 08:13
Groepaz

Registered: Dec 2001
Posts: 8608
it never worked, that has zero effect on those dots
2018-01-04 19:24
enthusi

Registered: May 2004
Posts: 646
Eight years ago some people thought it was stupid to consider their emulation even:
Emusuxx0r+
2018-01-04 20:05
TWW

Registered: Jul 2009
Posts: 436
Quote: or just spray it on your balls for a similar effect

Assuming one has balls
2018-01-04 21:57
WVL

Registered: Mar 2002
Posts: 839
Quote: Eight years ago some people thought it was stupid to consider their emulation even:
Emusuxx0r+


That was me :-) I still don't like those grey Dots!!
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