The PowerBook 170
was released by Apple Inc.
in 1991 along with the PowerBook 100
and the PowerBook 140
. Identical to the 140, it was the high end of the originalPowerBook line featuring a faster 25 MHz Motorola 68030
processor with Floating point unit
(FPU) and a more expensive and significantly better quality active matrix
display. It was replaced by the PowerBook 180
Though the PowerBook 100 is the direct descendant of the Macintosh Portable
based on its internal architecture, the 170 is the Portable's direct successor. A no-compromise, portable version of the desktop Macintosh, the 170 includes virtually all of the features incorporated in the original Portable, as on a comparable desktop of the day, but in a smaller and sleeker case design. Initiated as a more suitable replacement for the Portable, the only features the first generation 170 did not include in its reduced space were an external video port and internal ROM
expansion slots. Indeed, Apple canceled its own external monitor adapter for the Portable shortly after it was announced, instead relying on numerous third party providers for solutions (still applicable to the 170) and FCC regulations of the day prevented any real use of the PDS expansion slot, by restricting any external connections to it. The PowerBook 180
replacement would address external video less than a year later, but expansion slots would not return to Macintosh portables until three years later with the......