Macintosh PowerBook® 500 Series (code named "Blackbird")
The Macintosh PowerBook® 500 Series computers are a family of portable notebook computers. The PowerBook 500 Series are full-function desktop-replacement portable computers with a number of standard notebook computer features. They use either a Motorola MC68LC040 or a MC68040 processor as the standard processor. These standard processors are upgradable to an optional Motorola MPC603e PowerPC® processor through the exchange of the standard processor daughter card with the PowerPC® PowerBook® Processor Card Upgrade daughter card.
Product Design and Development Areas
Power supply and power control circuits
Designed and developed portions of the power supply and power control circuits. Validated operation of the Motorola-manufactured Apple-proprietary M68HC05 system control microcontroller.
Audio input and output circuits
Designed and developed portions of the audio input and output circuits. This included the microphone amplifier and the loudspeaker/headphone amplifier, along with associated control circuitry.
PC Card interface module
Designed and developed portions of the PC card interface expansion module. Designed part of the Apple-proprietary PC card interface ASIC.
- "PowerBook 500 series". Wikipedia. 4 April 2023. Retrieved 2023-05-17.
- "PowerBook 500 series - Compare Models," G. Sanford, apple-history, 2015.
- "PowerBook 550c," G. Sanford, apple-history, 2015.
- "PowerBook 520 and 520c and PowerBook 540 and 540c Computers Developer Note," A. Watson, Apple Computer, Inc., 1994.