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The final version of the Mac digital board
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When Steve Jobs caught wind of what Burrell had come up with - the Macitosh Motherboard - an Apple II priced machine that blew away the Lisa, he became really excited, and saw that Burrell's machine could become the future of Apple. Burrell's third Macintosh design was done in June 1981. The main reason was that he fell in love with a communications chip called the SCC. The SCC could support a built-in local area network, making AppleTalk possible with no additional hardware, as well as providing nice buffered serial ports with interrupts and other hardware features. At this point it also was becoming obvious that we needed at least 128K of memory to support the user interface, so he also added a second row of RAM chips.
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