PowerBook Buyer's Guide

PowerBook Duo 250

The 250 was the first Duo with an active-matrix screen displaying 16 levels of gray. It has a bright display with a larger hard drive than the 210 and 230, but is otherwise identical to the 230. The active-matrix screen makes this laptop a better buy than the 230, but it is also a little more expensive, harder to find, and uses a bit more juice while away from a power source. I'd recommend this machine to someone who doesn't necessarily care about a color display, but needs something brighter than what a passive-matrix screen offers. Thanks to Daniel Davis for the photo.


At the time: B

1 serial
internal modem
processor direct slot (PDS) for dock or floppy drive

Active-matrix 16-level grayscale
640x400 resolution

4.2 pounds

Apple's Specifications:

Logic Board Ports Power
Processor: 68030, 33 MHz
PMMU: integrated
FPU: opt. in Dock
Data Path: 32-bit, 33 MHz
L1 Cache: 0.5K
L2 Cache: none
2nd Processor: none
Slots: modem, dock
ADB: none
Video: none
Floppy: none
SCSI: none
Geoports: none
Ethernet: none
Mic Type: none
Other Ports: Printer,
Max Watts: 25
Amps: 1.04
BTU per Hr: 85.5
Voltage: 100-240
Freq Range: 50-60 Hz
Battery Type: Duo, NiMH Type II
Soft Power: yes
Memory Video Memory
Logic Board: 4 MB
RAM Slots: 1, Duo
Min - Max RAM: 4 MB - 24 MB
Min RAM Speed: 70 ns
RAM Sizes: 4-20 MB
Install in Groups of: 1
Resolution Video Memory
built-in LCD screen
(built in)
512 x 384 n/a-bit
640 x 400 4-bit
640 x 480 n/a-bit
800 x 600 n/a-bit
832 x 624 n/a-bit
1024 x 768 n/a-bit
1152 x 870 n/a-bit
1280 x 1024 n/a-bit
Physical Software Storage
Introduced: 10/21/1993
Discontinued: 5/1/1994
Form Factor: PowerBook Duo
Gestalt ID: 38
Weight (lbs): 4.2
Dimensions (in): 1.4 H x 10.9 W x 8.5 D
Addressing Modes: 24-, 32-bit
Orig SSW: 7.1
Orig Enabler: PowerBook Duo Enabler v1.0
ROM ID: $067C
ROM Ver: n/a
ROM Size: 1MB
AppleTalk Ver: 57.0.4
Mac OS
7.1.1 (Pro)
Floppy Size: none
Floppy Inject: n/a
Min. Int HD Size: 200MB
Int HD Interface: SCSI
Orig CD Speed n/a
Int CD Support: