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Wack problem with Magic 2 v2
Wack problem with Magic 2 v2 –
Got an NTSC V2 PS2 with a Magic 2 installed. This is a problem like none other Ive ever seen. The video is fine, it boots up nice, and the game loads. The intros and all for the games look as they would on any ol PS2. But when the Game Play starts its as if you put the PS2 on 8bit color on PSX grafics. As I said before everything else is fine, including the games, Ive tried multiple games, only the gameplay is like this. Extremely odd. Any Ideas? TIA
The only thing I can think of is that there seems to be a crap load of crud and junk on the back side of the board, but i cant even get access to that side untill tommorow cuz I dont have any Desoldering braid to take off the 4 massize pins that Sony decided would be nice to put on the damn v1-2 PS2s Errrr. hopefully thats the trouble, I shall see.
A stupid question, but how does it behave when the magis 2 has no power to it? Is this an issue that the machine originally had, or was it introduced during the magic 2 installation?
If not, that sounds like an issue with the GS. It might be possible that a trace to the GS or from the GS has some problems.
The Graphics InterFace (GIF) on the EE is the sole interface to the Graphics Synthesiser (GS). All data destined for the GS must pass through the GIF. Data is transferred to the GIF using DMA.
So there may be a via on the front side of the board connected to the Rambus ram that may be out of whack as well. If the route the data follows is interupted and the full 8 bits per color component is not transfered to the GS properly, the full color will not be displayed.
That and the fact that the GS does all the color conversion to NTSC/PAL/VESA would prove a bit more that the GS is at fault. The Movie playback is handled by the IPU ( image processing unit) on the EE and follows a different path than polys and textures which are drawn on screen during gameplay. While the data path for movies does go through the GS, there are no resisters set in the GS for the drawing of polys.