The PowerBook 145 replaced the 16 MHz PB 140 , using a 25 MHz 68030 CPU that made it significantly faster than the previous model.

As with all early PowerBooks, when buying one be sure it has all the memory you need (new PowerBook RAM is getting difficult to locate, especially at reasonable prices).

The PB 145 has an 8 MB memory ceiling, although you can go beyond that by using Virtual Memory (slow and free) or RAM Doubler (faster, not free, and discontinued). Another option is RAM Charger 8.1 , which offers better memory management than the Mac OS.

Specs (via Low End Mac)

• Cpu: 25 MHz 68030
• Fpu: none
• Performance: 3.8, relative to SE; 0.41, Speedometer 4
• Ram: 2 MB RAM, expandable to 8 MB using a special 100ns pseudostatic RAM card
• Rom: 1 MB
• Hard Drive: 40 or 80 MB
• Display: 9.8″ 1-bit 640 x 400 77 ppi passive matrix
• Gestalt Id: 54
• Code Name: Colt 45
• Adb Ports: 1 port for keyboard and mouse
• Weight: 6.8 pounds
• Serial Ports: 2 DIN-8 RS-422 ports on back of computer
• Scsi Ports: HDI30 connector on back of computer
• See: Online resources and links for the PowerBook 145