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shforstv by Paulo Simoes [web] [nfo]

platform :

  Atari ST
type :

  demo
release date : november 2006
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average rating 0.62
alltime top: #13089
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added on the 2009-04-28 by Mr. Styckx  

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This small demo was originally posted on atari-forum.com to show the use of some advanced synchronisation with the shifter, allowing to do hardscroll with 4 raster lines of cpu.

It only features a vertical scrolling, so it's more interesting code-wise than design-wise.

Although Steem or Saint may not run it, it will work with Hatari 1.3

Nice work from Paulo who pushed the ST limits.
  added on the 2009-04-28 20:53:24 by Mr. Styckx  
I contacted him in 2007 and he said he was retired!
Pff. Atarians.
  added on the 2009-04-28 22:47:48 by xernobyl  
The fastest syncscroller ever on the ST, 3 scanlines + syncline ! Are there any sources available?
  added on the 2009-04-29 07:41:47 by evil  
Technically impressive...
  added on the 2009-04-29 08:37:50 by HarryPotter  
No source available as far as I know but by reading http://www.atari-forum.com/viewtopic.php?f=68&t=9527 coders shold be able to understand how it works (the main part is to be able to create a 0 byte line in 50 Hz, which requires a 2 cycles precision and depends on the "wake up" state of the ST).
Also, I think the .blk file contains all lines length for the 256 possible combinations.
  added on the 2009-04-29 10:55:45 by Mr. Styckx  
tried it with hatari 1.2 (did not find 1.3) does not compute.
  added on the 2009-04-29 20:38:01 by Zweckform  
Worked for me with Hatari 1.2 (osx/ppc)....
  added on the 2009-04-29 21:59:55 by HarryPotter  
great, thanx for submitting it.
  added on the 2009-05-02 19:46:44 by seppjo  
Source code available here:
http://www.atari-forum.com/viewtopic.php?f=68&t=9527&p=188067#p188067
  added on the 2011-06-20 09:47:46 by ljbk  
Pushing the limit, fucking once again. Crazy.
Worked on Steem SSE 3.4.1.

Big thumb, big rulage!
  added on the 2013-01-24 01:18:46 by Buckethead  
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