I think I have a US SNES sitting around somewhere. If I get time this weekend Ill drill some holes in the case and run an S-video port to the points on the AV connector and see how it goes. I wouldn't think there would be much of a difference between it and a super Famicom though. Ill do it both with caps and without caps and see how it goes.
Thanks Skips. I just tested ;-
1) Composite @ 50Hz 625 lines w/ PAL 4.43MHz
2) Composite @60Hz 525 lines w/ NTSC 3.58MHz
3) Composite @60Hz 525 lines w/ PAL 4.43MHz
4) S-Video @ 50Hz 625 lines w/ PAL 4.43MHz
5) S-Video @60Hz 525 lines w/ NTSC 3.58MHz
6) S-Video @60Hz 525 lines w/ PAL 4.43MHz
7) RGB SCART via adapter block w/separate sync (C-Video) @ 50Hz 625 lines
8 ) RGB SCART via adapter block w/separate sync (C-Video) @60Hz 525 lines
9) Component (sync on green) @ 50Hz 625 lines
10) Component (sync on green) @60Hz 525 lines
...all from my Pioneer LX60D DVD / HDD recorder, direct into my IN76 projector, and NONE of them gave me any diagonal lines. S-Video was perfectly line free. I'll have a look at both PS1 and PS2 next.
UPDATE: My chipped FAT UK model SCPH-30003 R PS2 has a perfectly diagonal line free picture via S-Video into my IN76 pj, with the genuine Sony S-Video PS3 cable, when playing USA 60Hz games, and always outputs with PAL encoding @ 4.43MHz but with 525 lines, @60Hz interlaced.
These games had a perfect picture in S-Video on my pj ;-
Burnout NTSC USA @60Hz
Colin McRae Rally 3 NTSC USA @60Hz
Colin McRae Rally 3 UK PAL @50Hz
Gran Turismo 3 NTSC USA @60Hz
Gran Turismo 4 NTSC USA @60Hz
Gran Turismo Concept UK PAL @50Hz
MotorStorm Arctic Edge NTSC USA @60Hz
Need For Speed Carbon UK PAL @50Hz
Network Startup Disc
OutRun (Remake) NTSC Japan @60Hz - but slight banding on the large blue sky
Pro Rally UK PAL @50Hz
Sega Rally 2 (2006) NTSC Japan @60Hz
Sega Rally Championship NTSC Japan @60Hz
Tomb Raider Anniversary UK PAL @50Hz widescreen
Tomb Raider Legend NTSC USA @60Hz widescreen
However in Colin McRae Rally 04 and 05, both 50Hz versions, in PAL, there were herringbone patterns everywhere, but the really wierd thing was when I tried Colin McRae Rally 03 in 50Hz in PAL, and GT Concept in 50Hz in PAL, and Need For Speed Carbon in 50Hz in PAL, there was a perfect picture! In Richard Burns Rally in 50Hz in PAL there was a clear screen (intro graphics) BUT full screen dither pattern at all times during the game!! All this played from a HDD via HDLoader v0.8c, and via S-Video. I tested them all twice to make sure. Need to check some more games... and my PS1...
UPDATE: Tried my PS1 in S-Video in nearly all my games, I get a perfect picture via S-Video on my pj at all times, when it's outputting 625 lines @50Hz in PAL 4.43MHz, or when it's outputting 525 lines @60Hz with NTSC color encoding at 3.58MHz.
OK this is weird... when I try my chipped PS1 UK model 7500 with the cheap 3rd party PSX RGB SCART cable that I have, I can only get the boot rom screen (Sony / PS logo) to appear on my pj (in 625 lines / 50Hz), I get NO in game picture at all no matter what game I try with it, either from my PAL PS1 games or my NTSC USA PS1 games. No matter where I get C-Video (for sync) from. Any idea what the heck is going on?
UPDATE: I think there are maybe 2 explanations for this... either my pj doesn't like the RGB from my PSX (even though it works perfectly with my Slim or Fat PS2 (with PS2 games) and Pioneer LX60D in RGB mode at 525 lines @60Hz or 625 lines @50Hz), or my PS1 mod chip is causing some problem.
At first I thought it was because maybe the PSX changes to Composite Sync when in RGB mode, but then again it hasn't got any "mode", it's giving out RGB ALL the time, same as the PS2 Slim and Fat, (except when PS2 is in Component), and PSX is giving out Composite Video at all times (I checked) in 576i or 480i, with all my PS1 PAL or NTSC USA games, so it can't be that causing it.
BTW, this made me realise that maybe the reason that I can't get a picture out of my RGB NES on my IN76 pj is because maybe my pj can't handle C-Sync in RGB mode, it maybe only accepts C-Video as sync in RGB, hence the reason for no picture (I have to use the RGB SCART to S-Video converter instead), it's maybe because the RGB PPU doesn't have C-Video anymore, only C-Sync instead.
The same thing does NOT happen on my Fat chipped PS2 UK model SCPH 30003 R with my PS2 games, I get an RGB SCART picture on all my PS2 games (either NTSC USA ones or PAL UK ones). Same with my Slim non-chipped PS2.
I can't test whether there is no picture from either my Slim unchipped PS2 or my Fat mod chipped PS2 in RGB with my PS1 NTSC games, since the Slim won't let me play NTSC USA games (because it's not chipped) even when softmodded to play PS2 backups via ESR patch (since I don't think you can ESR patch PS1 games?!), and the Fat PS2 will only let me read PS1 discs when I disable the mod chip, which then won't let me read games from another region (since it then acts like an unchipped PS2!). And I can't put PS1 games onto USB stick and try them in the Slim like I can do with PS2 games on the Slim, and I can't put PS1 games onto the HDD of the Fat PS2 since it uses the PS1 CPU for HDD access when you are in PS2 mode!
In addition I get NO picture from my pj when using the Fat chipped PS2 or Slim unchipped UK PS2 model SCPH-70003 in RGB mode when using PAL original PS1 discs, in either Component or RGB, when the game starts. I only get a picture in the boot screen logo and sometimes in a video before the game. However I get a Composite Video picture at all times with PAL PS1 discs in either my Fat or Slim PS2's. So PS2 is acting like my PS1 in this case. But of course I get a picture using PS2 games in Component and RGB.
I notice that the RGB picture from both PS1 and PS2 Phat is noticeably sharper than the S-Video picture (which is already pretty sharp).
Just ordered an original genuine Sony PS3 Component cable (compatible with PS2) from Amazon USA (it was 1/2 the price of the UK one) and will see how I get on with that, looking to hopefully get the sharpness of RGB that I get on the Fat PS2, but in Component on my PS2's.
UPDATE: Noticed that my chipped PS2 cannot be set to Component video out, only RGB (screen does not go green or alter at all when I change it to Component in the System Configuration menu), maybe because of the mod chip. BUT my UK unchipped Slim PS2 SCPH-70003 will freely change between RGB and Component, and my pj accepts Component from it very nicely.
RGB SCART from my PS2 Slim, taking C-Video as sync half way along the cable from the C-Video socket on the RGB cable, looks nearly perfect in 625 lines @50Hz with only sometimes faint diagonal lines on some colors, and totally perfect 525 lines @60Hz, and no noise or wavy lines , using the same cheap 3rd party RGB cable as I used with PS2 Fat. Not quite as sharp as the PS2 Fat though on RGB, about the same sharpness as S-Video from the PS2 Fat.
Component from my Slim is pretty nice in 625 lines @50Hz with only very faint diagonal lines on certain colors, but at 525 lines @60Hz has some problems with quite a bit stronger diagonal lines on some colors, but there is no noise or wavy lines, again using the same cheap 3rd party RGB cable as I used with PS2 Fat. However if I remove the C-Video from the socket half way along the RGB cable (RGB cable becomes Component in Component video mode on the PS2) then the 625 lines @ 50Hz picture's faint diagonal lines become noticeably more pronounced, and the 525 lines @ 60Hz picture becomes a diagonal line tastic picture, not good, even though my Pioneer LX60D gives me a perfect picture in Component on this pj using the same cables when in 525 lines @60Hz. Again this Slim via Component is not quite as sharp as the PS2 Fat was though on RGB, about the same sharpness as S-Video from the PS2 Fat.