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 The Apple Macintosh computer - price and description
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The Apple Macintosh
PowerBook 520c features a 25 MHz 68LC040 processor, 4 MB or
12 MB of RAM, a 160 MB, 240 MB, or 320 MB hard drive, and
support for multiple batteries in a sleek portable case with
a 9.5" color dual-scan display. The PowerBook 500 series was
the first line of PowerBooks to have a "trackpad" where the
cursor followed the movement of your finger. The trackpad
was a revolutionary input device, and has been used since in
the vast majority of modern laptops.
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Introduction
Date:
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May 16, 1994
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Discontinued
Date:
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September 16,
1995
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Processor Type:
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68LC040
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Processor
Speed:
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25 MHz
1.
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Processor
Upgrade:
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N/A
2.
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FPU:
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N/A
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System Bus
Speed:
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25 MHz
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Lookaside Bus
Speed:
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N/A
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ROM Size:
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2 MB
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Data Path:
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32-bit
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Level 1 Cache:
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8k
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Level 2 Cache:
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N/A
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RAM Type:
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70 ns DRAM card
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VRAM Type:
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Built-in
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Standard RAM:
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4 MB, 12 MB
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Maximum RAM:
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36 MB
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Motherboard
RAM:
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4 MB
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RAM Slots:
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1 (PB 500
series)
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Standard VRAM:
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512k
3.
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Maximum VRAM:
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512k
3.
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Standard Hard
Drive:
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160, 240, 320
MB
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Int. Hard Drive
Type:
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SCSI
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Standard
CD-ROM:
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N/A
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Standard Disk:
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1.44 MB
(manual)
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Standard Modem:
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14.4k
(optional)
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Standard
Ethernet:
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AAUI-15
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Case Type:
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Portable (Gray)
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Form Factor:
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PowerBook 520
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Exp. Slots:
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Modem
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Exp. Bays
(Free):
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None
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Battery Type:
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PB 500 Series
NiMH
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Battery Life:
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2.0-3.5 hours
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Built-in
Display:
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9.5" Color
4.
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Supported
MacOS:
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7.1.1-8.1
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Dimensions:
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2.3 x 11.5 x 9.7
5.
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Avg. Weight:
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6.4 lbs.
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Original Price:
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$2800, $2900,
$4000
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Est. Current
Price:
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$100-$125 US
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Notes:
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1.
This model is somtimes designated as having a 50 MHz
processor,
 since
the clock input runs at 50 MHz. However, the processor
itself
is
not "clock doubled", so technically it is only a 25 MHz
processor.
2. Upgrades and
accelerators are available.
3. 512k of VRAM
supports an external color monitor (8-bit, 256
colors).
4. 9.5" Color
dual-scan (8-bit, 256 colors) LCD display.
5.
In inches, height x width x depth (while closed).
6.
Photo Credit: Apple Computer, Inc.
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