PS2 VGA HACK (kiss Sync on Green goodbye) ;) –
I'm releasing this information in order to help the fellow users of the Matrix Infinity, Origa 2 and possibly other VGA capable mods.
While trying the LM1881 PS2 VGA hacks arround I got annoyed by the fact I couldn't strip the sync signal of the green. That was causing a major problem on most monitors I tried to use with my PS2.
After a little bit of research I found out there were split Hsync and Vsync signals inside the PS2 just waiting to be tapped out. That simplified the circuit by a ton. But I still were having trouble with the green stripes on the edge of the image (Sync noise). Then I finnaly found a switch on the PS2 analog video encoder that completely disables the SoG mixer. I tested this and it doesn't seem to affect the Component Video output.
The Dreamcast VGA diagram from GameSX.com was used as reference for the
VSYNC/HSYNC buffer. it uses the same circuit but the pins 1 and 19 of the LS244 are tied to ground without a switch (aways enabled)
Thanks goes for GameSX.com for posting the VGA Box for Dreamcast schematics
Merry Christmas and happy hacking
P.S.: (this will work with PS2 linux too and will enable any VGA/VESA monitor to work on a PS2 console)
SCPH-10000_GH-001 SCPH-15000_GH-003 SCPH-18000_GH-008 SCPH-30001_GH-005 SCPH-30000_GH-016(V4) SCPH-30001_GH-010(V4)
2xSCPH-10190, 2xSCPH-10350, 2xSCPH-10280
"**** j0 hackers!"
-Sjeep (As seen on TOXIC OS ELF...)