No, I'm not talking about interlacing artifacts. I'm talking straight up dithering, basically exactly like the kind seen on the PS1. And it does appear to dither at some point at the game's framebuffer resolution, at least with certain games. GH/RB games show it really well.
Chip-free/MC-free homebrew <3
FMCB 1.93 on MC for emergencies, NA
250GB HDD/FHDB 1.93/OPL 0.9.2 (GSM and non-GSM)/PS2 games, NO HDDOSD
80GB HDD/FHDB 1.93/POPStarter rev12/OPL644/GSM0.37/PS1 games, NO HDDOSD
SCPH-75001 (sitting idle, slims suck):
FMCB 1.92 on MC