Specifications

CHAPTER 3
I/O Features
Disk Drives 25
ATA (IDE) Hard Disk 3
The Macintosh Performa 6400 computer has an internal hard disk that uses the standard
ATA-2 interface. This interface, used for ATA drives on IBM AT–compatible computers,
is also referred to as the IDE interface. The implementation of the ATA interface on the
Macintosh Performa 6400 computer is a subset of the ATA interface specification, ANSI
proposal X3T9.2/90-143, Revision 3.1.
Hard Disk Specifications 3
Figure 3-2 shows the maximum dimensions of the hard disk and the location of the
mounting holes. As the figure shows, the minimum clearance between conductive
components and the bottom of the mounting envelope is 0.5 mm.
17 +12V +12 volts
18 WR Write data
19 +12V +12 volts
20 n.c. Not connected
Table 3-3 Pin assignments on the floppy disk connector (continued)