Apple Macintosh PowerBook Duo 230 vs Apple Macintosh PowerBook Duo 250

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Macintosh PowerBook Duo 230 compared with Macintosh PowerBook Duo 250

	AppleMacintosh PowerBook Duo 230	AppleMacintosh PowerBook Duo 250
Overview
Released
Released	October 1992	1993
Display
Screen size
Screen size	9″	9″
Resolution
Resolution	640 × 400	640 × 400
Touchscreen
Touchscreen	No	No
Display type
Display type	Backlit supertwist passive-matrix LCD with 16 grey levels	Backlit active-matrix LCD with 16 grey levels. Apple's product description and technical table specify a 9-inch diagonal; the developer note gives a 192 × 120 mm active pixel area
Performance
Processor
Processor	Motorola 68030 33 MHz (PowerBook 165)	Motorola 68030 33 MHz (PowerBook 165)
CPU cores
CPU cores	1	1
Memory
Memory	4 MB	4 MB or 12 MB (better)
Storage
Storage	80 MB to 120 MB	200 MB (better)
CPU
CPU	33 MHz Motorola 68030	Motorola 68030 at 33 MHz, with integrated memory-management unit; no built-in floating-point coprocessor. An optional dock provides a maths coprocessor
Memory type
Memory type	4 MB on the logic board and one expansion slot; Apple states a 24 MB maximum using a third-party memory card	4 MB on the logic board and one Duo expansion-card slot; maximum 24 MB. Apple kits expand to 8 or 12 MB; larger capacities require third-party cards
Storage type
Storage type	August 1993 Apple Facts lists 80 MB and 120 MB internal hard-drive configurations; English support also lists a 160 MB drive. Optional external 1.4 MB floppy drive requires a Duo Floppy Adapter or Duo MiniDock	Internal 200 MB SCSI drive in Apple's 4/200 and 12/200 ordering configurations. The developer note mentions a 120 MB option without an ordering configuration. External floppy drive requires a Duo Floppy Adapter or MiniDock
Battery and size
Battery life (maker's claim)
Battery life (maker's claim)	Up to 4.5 hours	Up to 6 hours
Weight
Weight	1.9 kg	1.9 kg
Thickness
Thickness	36 mm	36 mm
Width × depth
Width × depth	277 × 216 mm	277 × 216 mm
Battery life detail
Battery life detail	Nickel-metal hydride battery; Apple claims an average of 2–4.5 hours	Removable Type II nickel-metal hydride battery; Apple's technical table claims 2.5–6 hours. Its later developer-note feature list and block diagram contain conflicting battery, colour-display and memory claims; the exact model's technical table controls these specifications
Connections
Operating system
Operating system	macOS	macOS
Port detail
Port detail	Serial/LocalTalk, docking connector, power input and internal modem expansion; desktop video and additional connections require a compatible dock	RS-422 serial/LocalTalk, 152-pin docking connector, power input and optional internal fax/data modem. External video, SCSI and floppy connections require docking accessories
External displays
External displays	–	Optional PowerBook Duo Dock or Duo MiniDock provides external video and desktop connections
Keyboard
Keyboard	–	Built-in keyboard with two-level tilt adjustment and Caps Lock indicator
Trackpad
Trackpad	Built-in trackball	19 mm trackball with two buttons
Speakers
Speakers	Built-in microphone and speaker; mono sound input/output	Built-in speaker; 8-bit monophonic sound input/output at 11 or 22 kHz
Microphones
Microphones	–	Built-in omnidirectional electret microphone, documented in the exact-model technical table despite the support summary's Mic Type none
In the box
In the box	Power adapter; an internal fax/data modem and docking accessories are optional	Computer, battery, AC adapter, System 7.1 software and documentation. The 12/200 configuration adds an internal Express Modem. Maker introduction was 21 October 1993; The Mac December 1993 current buying guide confirms retail presence that year without an exact first-sale month