Yep, it worked that time. Would you mind sharing how to do the VGA mod?
I wouldn't mind. First thing, you'll need some wires. Something not too thin, but not too thick. (If too thin, you may get interference on the picture). Now, there is two ways to go about this. One way assumes the VGA card has a proper mono mode (mine did not), and the other assumes it doesn't (like mine). You'll need a jumper wire from ground to VGA connector pin 12, if the video card supports proper mono palette. If it doesn't (and the palette loads "false" like a thermal camera), jumper pin 11.
Now, the wiring. For a fully functional mono palette card, just route lines G, Ground, H Sync, and V Sync to the model 25's video connector. The pinout of the connector (including color models), is on this site:
http://www.rwhirled.com/iBmac/iBmac-tips.htm
Now, if your video card doesn't support a proper monochrome palette, I'm going to show you the right way to do this. I didn't do this and is why my screen got so bright when it turned on. You need to grab the R, G, B lines and make a circuit like this:
Code:
GA CONNECTOR
____
RED 1 >-+-----------|____|----+
| ____ 82 ohm |
+-|____|-+ |
180 ohm | |
BGND 6 -----------+ |
____ |
GREEN 2 >-------------|____|----+----------------> VIDEO OUT
22 ohm |
____ |
BLUE 3 >-+-----------|____|----+
| ____ 240 ohm
+-|____|-+
100 ohm |
BGND 8 -----------+
GGND 7 ------------------------------------------ VIDEO GROUND
HSYNC 13 >----------------------------------------> HSYNC
VSYNC 14 >----------------------------------------> VSYNC
GND 5 ----------------------------------------- GROUND
Now, don't you have a color model 25? In that case, just connect the wires away without any of what I just said
R to R, G to G, B to B. But just make sure you use an OLD VGA card, that way you can possibly accidentally load a 800x600 scanrate or higher. And just remember, the model 25's CRT is technically fixed frequency, it only knows two things, 400 lines at 70Hz, and 480 lines at 60Hz. So EGA 350 line makes the screen high. Unlike a true multisync that would handle anything within reason..
