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Thanks all for your comments!  I realized that the LC575 board bus is 33mhz, so I best use a 33 and avoid clock problems. After much searching I found a seller on ebay with reasonable prices.  He's got 25, 33 and 40 mhz chips.  I ended up ordering this one:  ...

I'm ready to switch out the 68LC040 33mhz chip in my Mystic CC mobo for a 68040. There seem to be a few 25mhz chips on ebay but I can't find a 33mhz or 40mhz for a decent price. Compared to the FPU-less 68LC040, would there be much of a noticeable performance or speed difference between the...

For the screen I first tried to cut out the actual CRT screen. Was able to do it with a Dremel with diamond bit, but it was too dark to see through. So I got a piece of plexi from Home Depot, cut it down, put it in the oven for 5 minutes, then dropped it over the bezel so that it could harden...

For years I'd wanted to see if I could upgrade one of my Color Classics to a new mobo, but still use the existing color Trinitron monitor. I got pretty far in hooking things up (thanks to nextse7en!) but I messed up something on the logic board and it wouldn't boot any more. I felt bad about...

Okay I'm making progress...I've gleaned the A/B pinout from here : http://homepage2.nifty.com/frogeye/connector.html But I've read the CC uses composite sync. Pin 9 on the a/b 40 pin connector is supposed to accept both h-sync and v-synch...does that mean I can just fuse the two VGA sync wires...

Does anyone have the pinout info? Or a link to the Apple manual that has it? I've checked every manual i could get my hands on and none go into that level of detail. I've done the best I could connecting an ATOM mobo VGA to the CC monitor but it doesn't work (maybe I messed up my monitor in...

Hi nextse7en, are you able to post the pinout schematic for VGA -> Color Classic CRT? Been trying to do this awesome mod myself. The charm is truly in keeping the original monitor. By the way, any plans on selling your Core2Duo CC? I'm interested!! Thanks, Lux