Macintosh 128k Egret Chip

[Nev]

Hi, I'm trying to bring a dead 128k back to life. By swapping out components I've narrowed the problem down to the logic board which is now recapped and waiting for a new Egret chip. Apart from another 128k logic board, does anyone know where I can find one ?

 

[joshc]

The 128K doesn't have an Egret chip, that came much later. Which chip are you trying to replace and why do you think it's a problem? Is it definitely a 128K board?

 

[bdurbrow]

The 128k and 512k didn't have any custom chips at all... and I think the Plus didn't either - they were all built from standard off-the-shelf parts. The "special sauce" that made a Mac a Mac was all in the firmware for the PALs and the ROM chips.

They didn't start doing custom ASICs until the Mac SE and Mac II.

 

[joshc]

The 128k and 512k didn't have any custom chips at all... and I think the Plus didn't either - they were all built from standard off-the-shelf parts. The "special sauce" that made a Mac a Mac was all in the firmware for the PALs and the ROM chips.

They didn't start doing custom ASICs until the Mac SE and Mac II.

Yeah, and they didn't really start making hybrid chips like the Egret until the IIsi I believe.