PowerBooks & iBooks

Mac Portable (Backlit)

Apple took the underwhelming Portable, added a backlit 9.8" 1-bit 640 x 400 pixel active matrix screen, increased base RAM to 2 MB or 4 MB, decreased the RAM ceiling to 8 MB, and replaced expensive SRAM chips with less-expensive pseudo-SRAM. One negative side effect: pseudo-SRAM and backlighting draw more power, reducing battery life.

The huge size and massive weight of the otherwise-impressive Portable make us call it a Limited Mac.

The Portable was replaced by the first PowerBook models (100, 140, 170) in October 1991.

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