I tested on my PAL NES also and got exactly the same results.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.
Did people test this on different revisions of the NTSC PPU? Also what revision was the PPU in jsr's Famicom?