Original Macintosh 512K Logic Board Schematic


Posted on Feb 4, 2014

The following is one of the most rare and special documents here at the DigiBarn, the only known copy of the complete schematic specification of the 512K Macintosh Logic Board. Daniel Kottke co-authored this design which served as the basis for the 64K Macintosh prototypes and then the 128K launch Macintosh in January 1984. This may be the last ma


Original Macintosh 512K Logic Board Schematic
Click here to download the full size of the above Circuit.

jor computing system completely designed on a single sheet of paper (with all the ins and outs specified for the chips). The original D sized diagram has not been found but Daniel provided us with a smaller facsimile of the same time period. Legend had it Steve Jobs ordered a 128K logic board to be designed but the engineers, knowing that the first adopters of the Mac would upgrade their memory quickly, designed it to house 512K to allow upgradability. See more pictures of Daniel Kottke`s early Apple Macintosh circuit boards here.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Voltage Controlled Switch with 555
Multiple-feedback bandpass filter
Xilinx ISE Schematics Sequential Circuit
Voltage regulator
Arduino IR Transmitter & Receiver w/ LEDs Flickering Issue (Whats wrong with this circuit?)
400w mosfet amplifier circuit schematic
rem bell circuit
repair microcontroller circuit
Overvoltage Protection Circuit
Multi-Colour LED
UV/IR/Visible LED Flashlight with Intensity Control
USB Operated Home Appliances



Top