OAM reading isn't reliable

Discuss technical or other issues relating to programming the Nintendo Entertainment System, Famicom, or compatible systems.

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Post by thefox » Thu Oct 21, 2010 12:16 pm

jsr wrote:PAL NES
Most of the reads on lines 3-8 always failed, it never passed completely. The errors started from midway on line 3 and ended on beginning of line 8, and all other lines passed without errors. The exact patterns on these lines was random each time after reset. So nothing like the NTSC results, and I'd test on my other PAL unit also but the controller port is broken. Would be interesting to see if it behaves similar or is completely random.
I tested on my PAL NES also and got exactly the same results.

Did people test this on different revisions of the NTSC PPU? Also what revision was the PPU in jsr's Famicom?
Download STREEMERZ for NES from fauxgame.com! — Some other stuff I've done: fo.aspekt.fi

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