PowerBook 170

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PowerBook 170
PowerBook 170.jpg
Apple Macintosh PowerBook 170
DeveloperApple Computer
Product familyPowerBook
Release dateOctober 21, 1991; 29 years ago (1991-10-21)
Introductory priceUS$4,599 (equivalent to $8,633 in 2019)[1]
DiscontinuedOctober 19, 1992 (1992-10-19)
CPUMotorola 68030, 25 MHz
PredecessorMacintosh Portable
SuccessorPowerBook Duo series

The PowerBook 170 was released by Apple Inc. in 1991 along with the PowerBook 100 and the PowerBook 140. Identical in form factor to the 140, it was the high end of the original PowerBook line featuring a faster 25 MHz Motorola 68030 processor with Floating point unit (FPU) and a more expensive and significantly better quality 10 in (250 mm) active matrix display. It was replaced by the PowerBook 180 in 1992.


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 and PDS 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 PowerBook 500 series, in the form of PCMCIA cards. The 170 also dropped the external floppy disk port (only the Macintosh Classic II still had one) and made no provision for a second internal floppy disk port (a feature also missing from the rest of the desktop line by this time). Overall, it had roughly the equivalent features and performance of the powerful Macintosh IIci desktop in a laptop.

The 170 was introduced with System 7.0.1, specifically to support new power management and other unique hardware features. However, due to the RAM prices in 1991, combined with its already high list price, the 170, like the 100 and 140, only had 2 megabytes (MB) RAM soldered directly onto the logicboard, which critics felt was restrictive for use with System 7. Further, since localized versions of System 7 were not yet available worldwide, the Japanese 6.0.7 KanjiTalk version of Apple's System software, was modified to support all three new PowerBooks and released as version J-[2][3] As a result, this version was unofficially adapted for use with the standard 6.0.7 allowing many users to run System 6 on their PowerBooks, rather than upgrading on-board RAM with an expensive proprietary RAM card (a 6 MB card was US $899).[4] The 170 shipped with an additional 2 MB RAM card already installed, so it was less of a problem; however, 4 MB was the minimum recommended RAM size for use with System 7 and not practical for use with a RAM Disk, a battery power-saving feature.[1]


Though released at the same time as the PowerBook 140 and PowerBook 100, both the 140 and 170 were designed entirely by Apple, while the 100 was being miniaturized by Sony from the full-sized Macintosh Portable. As a result, the 170 represents the very first PowerBook created by Apple, with the 100 actually representing the first design improvements, though its internal architecture is the oldest in the series.


Timeline of PowerBook and iBook models

Power Mac G5Power Mac G4Power Macintosh G3Power MacintoshCompact MacintoshiBook G4iBook G4iBook (white)iBook (white)iBookPowerBook 2400PowerBook DuoPowerBook DuoPowerBook DuoPowerBook DuoPowerBook DuoPowerBook Duo 230PowerBook Duo 210PowerBook G4PowerBook G4PowerBook G4PowerBook G4PowerBook G3PowerBook 3400PowerBook 1400PowerBook 5300PowerBook 190PowerBook 500PowerBook 500PowerBook 500PowerBook 150PowerBook 180cPowerBook 165PowerBook 145bPowerBook 180PowerBook 165cPowerBook 160PowerBook 145PowerBook 170PowerBook 140PowerBook 100Macintosh Portable


  1. ^ a b LePage, Rick (November 12, 1991). "Bantam 170 packs punch". MacWEEK.
  2. ^ System J- ReadMe, 1991, Apple, Inc.
  3. ^ http://apple.ism.excite.co.jp/page/漢字Talk+6.0.7.html
  4. ^ "System 6 on a PowerBook 140/170". Archived from the original on September 7, 2008. Retrieved May 31, 2008.

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