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My first laptop and the first computer I purchased for myself (Feb96). I used it both at work and at home and shuttled it inbetween. I could take one of these systems apart in record time to updgrade the RAM or replace the hard drive. I seemed to be doing that a lot with these systems at work. Perhaps I was just bumping up the memory every time there was an extra RAM chip leftover.

Macintosh PowerBook 520/520c

Codename:

"Blackbird LC"

Introduced:

May 1994

Discontinued:

June 1995 (520)/September 1995 (520c)

Machine ID:

Model Number:

n/a

Support Status:

Obsolete

Processor:

Motorola 68LC040

Processor Speed:

25 MHz

Cache:

8k L1

System Bus:

25 MHz

Hard Drive:

160 - 240 MB

Media:

1.44 MB Floppy

Weight and Dimensions
(US):

6.3 lbs. (520)/6.4 lbs. (520c), 2.3" H x 11.5" W x 9.7" D

Weight and Dimensions
(Metric):

2.9 kg, 5.8 cm H x 29.2 cm W x 24.6 cm D

Original Mac OS:

System 7.1.1 (PowerBook 500 Series Enabler)

Maximum Mac OS:

Mac OS 8.1

Logicboard RAM:

4 MB

Maximum RAM:

36 MB

Type of RAM Slots:

1 - PB 5xx

Minimum RAM Speed:

70 ns

Graphics Card:

None

Graphics Memory:

512k

Built-in Display:

9.5" 4 bit 640x480 (520) or 9.5" LCD 8 bit 640x480 (520c)

Display Connection:

Mini-15

Expansion Slots:

Modem, Optional Type II/III PC Card Bay

Expansion Bays:

PowerBook Expansion Bay (90-pin) PDS

Hard Drive Bus:

SCSI

Backup Battery:

n/a

Power Adapter:

n/a

System Battery:

NiMH

Max Watts:

40 Watts

Ethernet:

AAUI-15

Infrared:

None

Modem:

None

ADB:

Serial:

SCSI:

HDI-30

USB:

None

FireWire:

None

Audio In:

Stereo 16 bit (built in mono mic)

Audio Out:

Stereo 16 bit (built-in speakers)

History:

Introduced in May 1994, the PowerBook 520 was the first PowerBook with '040 power. A track pad replaced the rolling ball in older PowerBooks, and the 520 had a built-in microphone and stereo speaker. The 520 was priced at $2,270 U.S. with an passive-matrix 4-bit grayscale screen, and the 520c, with a dual-scan 256-color screen (the 520c was the first PowerBook to include one), cost $2,900 U.S.

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