Apple 2400C manual Hard Disk Size, Expansion, Port for Floppy Disk Drive

C H A P T E R 1

Delta Guide to the PowerBook 2400c Computer

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 1-3shows the signal assignments on the floppy disk drive connector. A slash character (/) before a signal name indicates an active-low signal.

Table 1-3Signals 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

Features 7