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Notable ICs on the Mac 128K logic board:

Motorola MC68000G8 Microprocessor

Fairchild Semiconductor 74LS393 Video Counter

Micron 4264 64 kb RAM (64 kb x 16 chips = 1024 kb, or 128 KB)

The namesake for the 128K was this non-upgradable array of RAM. Anticipating that customers would want more power, Apple engineers secretly designed the logic board to facilitate manufacturing a 512 KB version, which was released only nine months later.

Simtek C19728 and C19729 32 KB ROM (32 KB x 2 ICs = 64 KB)

Simtek 344-0041-A "Integrated Woz Machine" Disk Controller

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