Macintosh PowerBook 550c
Codename: "Blackbird, SR-71, Spruce Goose"
Introduced: May 1994
Discontinued: October 1994 (540)/August 1995 (540c)
Processor: Motorola 68040
Processor Speed: 33 MHz
Cache: 8k L1
Data Path: 32 bit
System Bus: 33 MHz
Hard Drive Size: 750 MB
Media: 1.44 MB Floppy
Weight and Dimensions: 6.8 lbs., 2.3" H x 11.5" W x 9.7" D
Original Mac OS: Mac OS J-7.5
Maximum Mac OS: Mac OS 8.1
Machine ID: 72
Motherboard RAM: 4 MB
Maximum RAM: 36 MB
Number of Sockets: 1 - PB 5xx
Minimum RAM Speed: 70 ns
Graphics Card: None
Video Memory: 512k
Built-in Display: 10.4" LCD, 8 bit 640x480/16-bit 640x400 Active Matrix
Display Connection: Mini-15
Slots: Modem, Optional Type II/III PC Card Bay
Hard Drive Bus: SCSI
Expansion Bays: n/a
Modem: None
Airport: None
Bluetooth: None
PRAM: n/a
Power: 40 Watts
Battery: NiMH
ADB: 1
Serial: 1
SCSI: HDI-30
USB: None
FireWire: None
Ethernet: AAUI-15
Infrared: None
Sound In: Stereo 16 bit (built in mono mic)
Sound Out: Stereo 16 bit (built-in speakers)
History: Introduced a year after the 540c and released only in Japan, the 550c increased the screen size to 10.4" and added an integrated FPU. (that is, it replaced the 68LC040 of the 540c with a full 68040 processor.) It also came in a cool black case.

