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Digger
Registered: Mar 2005
Posts: 447 |
$d011 trickery duplicated text lines
Does any one know the $d011 trick to repeat the first char row? I am trying to cancel badlines on the 8th line of each charline (between cycles 54-57) but it doesn't work. The first line gets duplicated but only twice. |
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tlr
Registered: Sep 2003
Posts: 1803 |
Quote: Quoting tlrIt's related to the char and color buffer in the VIC, not VCBASE. There was a race between writing (vmli) and reading this out (dmli) in an apparently rare case. But can this be exploited for demo purposes? :)
Probably not, but never say never.
I'm not even sure these counters are separate counters in reality.
It was a long time since I wrote that piece of code, but I think part of the choice was due to trying to separate the cpu clock domain code from the dot clock domain code more cleanly. |
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tlr
Registered: Sep 2003
Posts: 1803 |
I've committed a fix for the bug 1627 issue in r41978 (based on the patch PiCiJi supplied).
This should really be emulated in the way described here: bug 218, but not today. :)
The committed fix passes the regression suite (thanks gpz!) but please test the current trunk with your "worst" VIC-II abuse!
Builds are here: https://github.com/VICE-Team/svn-mirror/releases |
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tlr
Registered: Sep 2003
Posts: 1803 |
friendly reminder: Please run some of your tests this weekend. |
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chatGPZ
Registered: Dec 2001
Posts: 11499 |
please :) |
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JackAsser
Registered: Jun 2002
Posts: 2038 |
Quote: please :)
Doesn't work on Vice 2.1.. :( |
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tlr
Registered: Sep 2003
Posts: 1803 |
Quote: Doesn't work on Vice 2.1.. :(
anybody else want to pull some wise-guy cracks? :)
if not, it would be very helpful to get some feedback on if it's messing up your favourite effects. |
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Oswald
Registered: Apr 2002
Posts: 5118 |
back to topic, repeating all 8 lines only possible by writing atleast once to d011 on the visible screen ? many here writes cycles 54-58, cycle 58 start of the border? |
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HCL
Registered: Feb 2003
Posts: 728 |
There is an example on codebase.. https://codebase.c64.org/doku.php?id=base:repeating_char-lines |
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Oswald
Registered: Apr 2002
Posts: 5118 |
Quote: There is an example on codebase.. https://codebase.c64.org/doku.php?id=base:repeating_char-lines
already tested that and doesnt answer the question, anyway looks like its not possible, just wanted to make sure asking here. |
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HCL
Registered: Feb 2003
Posts: 728 |
Hmm.. that's ok, but there is so much stuff posted in here so i don't know what the question is anymore :D.
I could assume it's about open sideborder combined with this effect.. and in that case the answer is no. |
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