Macintosh PowerBook 540/540c
Codename: "Blackbird, SR-71, Spruce Goose"
Introduced: May 1994
Discontinued: October 1994 (540)/August 1995 (540c)
Processor: Motorola 68LC040
Processor Speed: 33 MHz
Cache: 8k L1
Data Path: 32 bit
System Bus: 33 MHz
Hard Drive Size: 240-500 MB
Media: 1.44 MB Floppy
Weight and Dimensions: 7.1 lbs., 2.3" H x 11.5" W x 9.7" D
Original Mac OS: Mac OS 7.1.1
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: 9.5" 8 bit 640x480 (520) or 9.5" LCD 16 bit 640x480 (520c)
Display Connection: Mini-15
Slots: Modem, Optional Type II/III PC Card Bay
Hard Drive Bus: SCSI
Expansion Bays: PowerBook Expansion Bay (90-pin) PDS
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 in May 1994 alongside the 520/c, the PowerBook 540/c was the most powerful PowerBook of its time. The 540 was priced at $3,160 U.S., and the 540c cost $4,840 U.S.

