"Group of Seven" Macintosh Logic Boards
Bare Boards from 1981-1983

The following is the "Group of Seven" Macintosh logic boards from First PCB and First Build in 1982 through the transition from byte-wide to word-wide and thence to the final 512K logic board in 1983. The "Mister Macintosh" logo makes its appearance toward the end of the series. These "bare boards" reside in the private collection of Daniel Kottke who loaned them to the DigiBarn for our Mac at 20 anniversary online exhibit.

Burrell Smith was the lead engineer on this class of Mac hardware. You can read more about the different renditions of Burrell's Macintosh here. More on this very historical artifact below. It doesn't get more rare and more core to the history of the Mac than this folks!

First PCB (1981) (click here for highest rez version)	| First PCB (reverse) (click here for highest rez version)
First Build (1981) (click here for highest rez version)	First Build (reverse) (click here for highest rez version)
IBM Board (1982) Integrated Burrell Machine (click here for highest rez version)	IBM Board (reverse) Integrated Burrell Machine (click here for highest rez version)
First 512K Board (1982) (click here for highest rez version)	First 512K Board (reverse) (click here for highest rez version)
SCC Word-Wide (1982) (click here for highest rez version)	SCC Word-Wide (reverse) (click here for highest rez version)
512K 200-Build (1983) (click here for highest rez version) *** See Mister Macintosh above! ***	512K 200-Build (reverse) (click here for highest rez version)
Final (1983) (click here for highest rez version)	Final (reverse) (click here for highest rez version)

Multiple sets of these bare boards were distributed to the Macintosh Division team. This is the only known complete set.

See also:

Our Mac at 20 anniversary online exhibit

Our pages on the Macintosh wire wrap board #5

Also related is our scan of the 512K Macintosh Logic Board Schematic

Mister Macintosh logo

and see the DigiBarn's original Macintosh sytems from 1984