powerbook 520/c
Minimum OS: 7.1.1
Maximum OS: 8.1
Introduced: May 1994
Terminated: Sep 1995
Processor
CPU: Motorola MC68LC040
CPU Speed: 25 MHz
FPU: none
Bus Speed: 25 MHz
Register Width: 32-bit
Data Bus Width: 32-bit
Address Bus Width: 32-bit
Level 1 Cache: 4 kB data, 4 kB instruction
ROM: 2 MB
RAM Type: unique
Min RAM Speed: 70 ns
Onboard RAM: 4 MB
RAM slots: 1
Maximum RAM: 36 MB
Expansion Slots: modem, optional type II/III PC Card bay
Video
Screen: 9.5" dual-scan
Max Resolution: 8 bit 640x480
Storage
Hard Drive: 130-320 MB
Floppy Drive: 1.4 MB SuperDrive
powerbook 520 and 520c
The powerbook 500 series were the first powerbooks with the power motorola 68LC040 CPU (simultaneous with the powerbook duo 280) and were upgradeable to the PowerPC architecture via a swap out CPU daughter card (with the PowerPC and 68040 upgrades for sale). The 500 series were also the first laptop computer to use a trackpad instead of a trackball as a built-in pointing device and the first to have ethernet networking built-in. The model 520 came with a passive matrix and the 520c with a color passive matrix display with 16bit stereo sound with stereo speakers, had an expansion bay, PC Card capability, and two battery bays. The powerbook 500 series were also the last powerbooks with scsi-harddisc.