Apple Macintosh PowerBook 2400c - Manual (Page 17)

C H A P T E R 1
Delta Guide to the PowerBook 2400c Computer
Features 7
Hard Disk Size 1
The storage capacity of the built-in hard disk in the Macintosh PowerBook 2400c
computer is 1.3 GB.
I/O Expansion 1
Because of its small size, the PowerBook 2400c computer does not have an expansion
bay, so it does not accept an internal CD-ROM drive or floppy-disk drive. The user can
attach an external floppy disk drive to a port on the back of the computer. Other external
drives can be connected to the SCSI port. Figure 1-2 on page 3 shows the locations of the
ports.
Port for Floppy Disk Drive 1
The back of the Macintosh PowerBook 2400c computer has a separate port for
connecting a Macintosh PowerBook external floppy disk drive.
The connector for the external floppy disk drive is a Molex type 52629-2611. Table 1-3
shows the signal assignments on the floppy disk drive connector. A slash character (/)
before a signal name indicates an active-low signal.
Table 1-3 Signals on floppy disk drive connector
Pin Signal Pin Signal
1 GND 2 FL_ENABLE
3 N.C. 4 HDSEL
5 GND 6 MB_+5V
7 GND 8 MB_+5V
9 WRDATA 10 /DEV_IN
11 PHASE(0) 12 PHASE(1)
13 PHASE(2) 14 MB_+5V
15 PHASE(3) 16 /WRREQ
17 N.C. 18 N.C.
19 GND 20 MB_+5V
21 FD_RD 22 GND
23 GND 24 GND
25 GND 26 GND