Check the Developer Notes for each machine, they all have a rough logic diagram, listing the interconnections between the various ASICS, the CPU, what is connected to the Fast and Slow System buses and how.

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I just discovered these today. I thought they were more geared towards developers of expansion cards and software, but they might help in figuring out what these wires are doing. I will review the notes for the LC III and let you know what I can find out.

Judging from the paths, lengths and the hot glue holding down the green wires. I'd say they were standard rework wiring for bad traces on that board in particular, or to fix an incorrect PCB layout.

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I don't know. I would have thought that Apple manufacturing techs would do a better job of rework than this. They could have at least washed the board when they were done.

I'd examine that board VERY closely for any verbiage, dates and revision#s you can find. With that much rework, you may have, either a very early production board or maybe even a prototype MoBo on your hands. [] ]'>

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All I can find is a black stamp that probably reads "9B", a bar code and serial number of sorts "*B13020Q5EN6B* SINGAPORE VAIL", and printed on the logic board PCB "APPLE COMPUTER INC., 820-0650-A © 1992, 630- - ".

BTW, I LOVE your avatar, what's the resistance value? )

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You must have one of those fancy color monitors.

Here's the LC's new home.

http://patater.com/files/pictures/lciii_desk.jpg