line of small subnotebooks manufactured and sold by Apple Computer
The PowerBook Duo 2300c was Apple’s only PowerBook Duo based on a PowerPC CPU. To make the 2300c compatible with Duo Docks for earlier models, the 100 MHz 64-bit PowerPC 603e CPU was used on a 33 MHz 32-bit bus, which seriously compromised performance.
The 9.5″ 640 x 480 display normally runs in 8-bit/256-color mode, but by switching to 640 x 400 resolution it support 16-bit color.
According to the Road Warrior and Other World Computing , the drive controller in pre-G4 PowerBooks is incompatible with ATA-6/Ultra ATA-100 hard drives.
Specs (via Low End Mac)
Cpu: 100 MHz PPC 603e
Performance: unknown
Ram: 8 or 20 MB, expandable to 56 MB
Rom: 2 MB
Hard Drive: 750 MB or 1.1 GB
Display: 640 x 480 9.5″ 85 ppi active matrix with 8-bit color (16-bit color at 640 x 400)
Gestalt Id: 118
Code Name: AJ
Serial: 1 DIN-8 RS-422 port on back of computer
Weight: 4.8 pounds
Adb Port: only with dock
Scsi Port: HDI30 connector on dock
Power Supply: M4174
See: Online resources and links for the PowerBook Duo 2300c
The PowerBook Duo 210 was the first dockable Mac. By eliminating the internal floppy drive (as Apple had done with the PowerBook 100 ) along with other size- and weight-saving measures, Apple got it down to 4.2 pounds.
Because of its design, PowerBook Duos cannot use a floppy drive, external hard drive or other SCSI device, connect to an external display, or be used on a network without a dock.
The Duo sports a 4-bit passive-matrix screen similar to the 6.8 lb. PowerBook 160 .
Specs (via Low End Mac)
Cpu: 25 MHz 68030
Fpu: optional 68882 in dock
Performance: 3.8, relative to SE; 0.43, Speedometer 4
Ram: 4 MB, expandable to 24 MB using a single Duo RAM card
Rom: 1 MB
Hard Drive: 80 MB
Display: 9″ 640 x 400 84 ppi 4-bit passive matrix
Gestalt Id: 29
Upgrade Path: Duo 280
Weight: 4.2 pounds
Adb Port: only with dock
Scsi Port: only with dock
Serial Ports: 1 DIN-8 RS-422 port on back of computer
Power Supply: M7783
See: Online resources and links for the PowerBook Duo 210
Along with the 25 MHz PowerBook Duo 210 , the Duo 230 was the first dockable Mac. By eliminating the internal floppy drive (as with PowerBook 100 ) along with other size and weight saving measures, Apple got this one down to 4.2 pounds.
Because of its design, there is no way to use a floppy drive, SCSI device, external display, or network without adding a DuoDock of some sort.
The Duo sports a 4-bit passive-matrix screen similar to the 6.8 lb. PowerBook 160 .
Specs (via Low End Mac)
Cpu: 33 MHz 68030
Fpu: optional 68882 in dock
Performance: 4.6, relative to SE; 0.58, Speedometer 4
Ram: 4 MB, expandable to 24 MB using a single Duo RAM card
Rom: 1 MB
Display: 640 x 400 84 ppi 4-bit passive matrix
Gestalt Id: 32
Upgrade Path: Duo 280
Weight: 4.2 pounds
Adb Port: only with dock
Scsi Port: only with dock
Serial Ports: 1 DIN-8 RS-422 port on back of computer
Power Supply: M7783
See: Online resources and links for the PowerBook Duo 230
The PowerBook Duo 2300c was Apple’s only PowerBook Duo based on a PowerPC CPU. To make the 2300c compatible with Duo Docks for earlier models, the 100 MHz 64-bit PowerPC 603e CPU was used on a 33 MHz 32-bit bus, which seriously compromised performance.
The 9.5″ 640 x 480 display normally runs in 8-bit/256-color mode, but by switching to 640 x 400 resolution it support 16-bit color.
According to the Road Warrior and Other World Computing , the drive controller in pre-G4 PowerBooks is incompatible with ATA-6/Ultra ATA-100 hard drives.
Specs (via Low End Mac)
Cpu: 100 MHz PPC 603e
Performance: unknown
Ram: 8 or 20 MB, expandable to 56 MB
Rom: 2 MB
Hard Drive: 750 MB or 1.1 GB
Display: 640 x 480 9.5″ 85 ppi active matrix with 8-bit color (16-bit color at 640 x 400)
Gestalt Id: 118
Code Name: AJ
Serial: 1 DIN-8 RS-422 port on back of computer
Weight: 4.8 pounds
Adb Port: only with dock
Scsi Port: HDI30 connector on dock
Power Supply: M4174
See: Online resources and links for the PowerBook Duo 2300c
Introduced in October 1993, the Duo 270c added an active matrix 640 x 480 pixel 256-color screen to the Duo 230 . With the improved battery, this color Duo could still run for two hours per charge.
The 270c supports 16-bit video on its screen if you select the 640 x 400 pixel mode under Options in the Monitors control panel.
Specs (via Low End Mac)
Cpu: 33 MHz 68030
Fpu: 33 MHz 68882
Performance: 4.6 (relative to SE)
Ram: 4 MB RAM, expandable to 24 MB using a single Duo RAM card
Rom: 1 MB
Display: 9″ 640 x 480 @ 8-bits, 640 x 400 @ 16-bits, 89 ppi active matrix
Gestalt Id: 77
Upgrade Path: Duo 280c
Weight: 4.8 pounds
Adb Port: only with dock
Scsi Port: only with dock
Serial Ports: 1 DIN-8 RS-422 port on back of computer
Power Supply: M7783
See: Online resources and links for the PowerBook Duo 270c
Apple upped the ante by moving from the 68030 to the 68LC040 processor on the Duo 280 and 280c in May 1994. (The 68LC040 is a low power version of the 68040 with the internal FPU disabled.) Other than the CPU, this is essentially a Duo 270c .
Like the 270c, the 280c supports 16-bit video if you select the 640 x 400 pixel mode under Options in the Monitors control panel.
Specs (via Low End Mac)
Cpu: 33 MHz 68LC040
Ram: 4 MB, expandable to 40 MB using a single Duo RAM card
Rom: 1 MB
Display: 8.4″ 640 x 480 @ 8-bits, 640 x 400 @ 16-bits, 95 ppi active matrix
Gestalt Id: 103
Weight: 4.8 pounds
Adb Port: only with dock
Scsi Port: only with dock
Serial Ports: 1 DIN-8 RS-422 port on back of computer
Power Supply: M2693
See: O nline resources and links for the PowerBook Duo 280c
Apple upped the ante by moving from the 68030 to the 68LC040 processor on the Duo 280 and 280c in May 1994. (The 68LC040 is a low power version of the 68040 with the internal FPU disabled.) Other than the CPU, this is essentially a Duo 270c .
Like the 270c, the 280c supports 16-bit video if you select the 640 x 400 pixel mode under Options in the Monitors control panel.
Specs (via Low End Mac)
Cpu: 33 MHz 68LC040
Ram: 4 MB, expandable to 40 MB using a single Duo RAM card
Rom: 1 MB
Display: 8.4″ 640 x 480 @ 8-bits, 640 x 400 @ 16-bits, 95 ppi active matrix
Gestalt Id: 103
Weight: 4.8 pounds
Adb Port: only with dock
Scsi Port: only with dock
Serial Ports: 1 DIN-8 RS-422 port on back of computer
Power Supply: M2693
See: O nline resources and links for the PowerBook Duo 280c
