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Horizontal Pseudo 512 Mode: Difference between revisions

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(overscan prevents all of the screen from being displayed)
(not effective in Mode 5 or 6)
 
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'''Pseudo HiRes Mode''' is a transparency technique that displays the [[Main Screen]] and [[Sub Screen]] at the same time without the use of color math.  It is enabled by setting bit 3 of SETINI (2133h).  Columns of dots with an odd horizontal position are drawn by sampling a subscreen pixel, and columns of dots with an even horizontal position are drawn by sampling a main screen pixel. A CRT televsion blends the adjacent dots together, creating the transparency effect.
'''Pseudo Hi-Res Mode''' is a transparency technique that displays the [[Main Screen]] and [[Sub Screen]] at the same time without digital [[color math]] blending any pixels.  It is enabled by setting bit 3 of SETINI (2133h).  Columns of dots with an odd horizontal position are drawn by sampling a subscreen pixel, and columns of dots with an even horizontal position are drawn by sampling a main screen pixel. <sup>[3]</sup> A [[CRT]] televsion blends the adjacent dots together, creating the transparency effect.
 
Psuedo hi-res mode is not effective in [[Mode 5]] or [[Mode 6]].
 
As of 2022, there are no tools for working with psuedo hi-res mode. <sup>[2]</sup>


=== Examples ===
=== Examples ===
* the HUD in Jurassic Park
* the HUD in ''Jurassic Park''
* the trees in Kirby's Dreamland 3
* the trees in ''Kirby's Dreamland 3''


=== See Also ===
=== See Also ===
Line 9: Line 13:


=== References ===
=== References ===
* https://nesdoug.com/2022/05/30/other-modes/
# https://nesdoug.com/2022/05/30/other-modes
# https://forums.nesdev.org/viewtopic.php?p=279353#p279353
# https://board.zsnes.com/phpBB3/viewtopic.php?p=47257
# Chapter 9. [https://archive.org/details/SNESDevManual/book1/page/n74 page 2-9-1 of Book I] of the official Super Nintendo development manual
 
[[Category:Video]]
[[Category:Official Jargon]]

Latest revision as of 12:26, 25 January 2024

Pseudo Hi-Res Mode is a transparency technique that displays the Main Screen and Sub Screen at the same time without digital color math blending any pixels. It is enabled by setting bit 3 of SETINI (2133h). Columns of dots with an odd horizontal position are drawn by sampling a subscreen pixel, and columns of dots with an even horizontal position are drawn by sampling a main screen pixel. [3] A CRT televsion blends the adjacent dots together, creating the transparency effect.

Psuedo hi-res mode is not effective in Mode 5 or Mode 6.

As of 2022, there are no tools for working with psuedo hi-res mode. [2]

Examples

  • the HUD in Jurassic Park
  • the trees in Kirby's Dreamland 3

See Also

References

  1. https://nesdoug.com/2022/05/30/other-modes
  2. https://forums.nesdev.org/viewtopic.php?p=279353#p279353
  3. https://board.zsnes.com/phpBB3/viewtopic.php?p=47257
  4. Chapter 9. page 2-9-1 of Book I of the official Super Nintendo development manual
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