Search found 7 matches

by cmr
Wed Sep 21, 2022 2:09 pm
Forum: Homebrew Projects
Topic: 2A07: A Space Odyssey
Replies: 18
Views: 1436

Re: 2A07: A Space Odyssey

Here are captures from the same NES, the only difference being RP2C07-0 vs RP2C07A-0 - easily testable as I socketed the PPU. As you can see there's no perceivable difference in color, the only difference is the 'jitter' in pixels. This might be variation in startup state, as when I retried the test...
by cmr
Sun Sep 18, 2022 2:41 pm
Forum: Homebrew Projects
Topic: 2A07: A Space Odyssey
Replies: 18
Views: 1436

Re: 2A07: A Space Odyssey

Tepples, oh I missed the part where you describe how the letters will fade in and out. That is not something that will happen on PAL, the colors there are stable between frames.
by cmr
Sun Sep 18, 2022 2:38 pm
Forum: Homebrew Projects
Topic: 2A07: A Space Odyssey
Replies: 18
Views: 1436

Re: 2A07: A Space Odyssey

Tepples, that looks quite similar to the chroma subsampling effect on PAL. Lidnariq, I finally managed to get an NES with the RP2C07A-0 PPU. My theory is that PAL NES's with high serial numbers, probably at least 5 million +, will have it. I found this page where a Spanish NES with serial number PE5...
by cmr
Sat Jul 23, 2022 1:52 am
Forum: Homebrew Projects
Topic: 2A07: A Space Odyssey
Replies: 18
Views: 1436

Re: 2A07: A Space Odyssey

But RP2C07A seems very rare, I can't even find any photo of one, nor any place that would claim to sell one. Hm, that might be in error. I just found another source that claims no-suffix, -0, and A-0. We might need to update the wiki. Cool. Forgot to mention, had to open up my NES to see what I hav...
by cmr
Fri Jul 22, 2022 2:37 pm
Forum: Homebrew Projects
Topic: 2A07: A Space Odyssey
Replies: 18
Views: 1436

Re: 2A07: A Space Odyssey

We know of three first-party 2C07 revisions (-0, A, A-0) and we know that (one of?) the latter two have a different video DAC that makes them work better with the HiDefNES board, so I suspect the video DAC is faster, and thus the amount of hue shift as a function of brightness is smaller, or at lea...
by cmr
Tue Jul 19, 2022 11:56 am
Forum: Homebrew Projects
Topic: 2A07: A Space Odyssey
Replies: 18
Views: 1436

Re: 2A07: A Space Odyssey

Oh, interesting, so different 2C07 PPUs will produce different results? Is it a question of the revision of the PPU, or just general variability? I have just done measurements on my own scandinavian PAL NES so far, maybe I should look for one or more extra ones. The use of PAL chroma merging is actu...
by cmr
Tue Jul 19, 2022 8:23 am
Forum: Homebrew Projects
Topic: 2A07: A Space Odyssey
Replies: 18
Views: 1436

Re: 2A07: A Space Odyssey

Hi! I'm the programmer behind this demo. Yes, I agree that the current emulators are sufficient for this, especially Mesen and Nintendulator, except for the PAL emulation. I wasn't aware that FCEUX does have a PAL filter. I tested it, but unfortunately it does not do chroma merging. This is noticeab...