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Horizontal Pseudo 512 Mode: Difference between revisions

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(clarified how color math is used)
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# https://forums.nesdev.org/viewtopic.php?p=279353#p279353
# https://forums.nesdev.org/viewtopic.php?p=279353#p279353
# https://board.zsnes.com/phpBB3/viewtopic.php?p=47257
# https://board.zsnes.com/phpBB3/viewtopic.php?p=47257
# [https://archive.org/details/SNESDevManual/book1/page/n74 page 2-9-1 of Book I] of the official Super Nintendo development manual
# 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:Video]]

Revision as of 13:31, 20 December 2023

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.

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