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Perhaps the most common cards found on early Apple II systems were the Disk II Controller Card, which allowed users of earlier Apple IIs to use the Apple Disk II, a 5¼ inch, 140 kB floppy disk drive; and the Apple 16K Language Card, which increased the base memory of late-model Apple II and standard Apple II Plus units from 48 kB to 64 kB.
Starting with the 80-conductor cable defined for use in ATAPI5/UDMA4, the master Device 0 device goes at the far-from-the-host end of the 18-inch (460 mm) cable on the black connector, the slave Device 1 goes on the grey middle connector, and the blue connector goes to the host (e.g. motherboard IDE connector, or IDE card).
The power connector was typically the same 4-pin female Molex connector used in many other internal computer devices. The communication connectors on the drives were usually a 50 (for 8-bit SCSI) or 68 pin male (for 16-bit SCSI) " IDC header " which has two rows of pins, 0.1 inches (2.54 mm ) apart.
The male PCB connector on the 3½-inch floppy drive is normally a polarized right-angle male header, which is a TE Connectivity / AMP 171826-4, [4] the straight model is AMP 171825-4. [5] The shape of the connector housing makes it very easy to determine the pin number allocations by visual inspection.
The desktop computer hard-drive connector (AMP Mate-n-Lok 1-480424-0 power connector) is standard on all 5.25-inch floppy drives, 3.5-inch PATA and non-SCA SCSI disk drives; however, newer SATA disk drives employ a more advanced interconnection with 15 contacts. These advanced connection systems were first developed by Molex and other connector ...
These drive fittings come in four common sizes: 1 ⁄ 4 inch, 3 ⁄ 8 inch, 1 ⁄ 2 inch, and 3 ⁄ 4 inch (referred to as "drives", as in "3 ⁄ 8 drive"). Despite being denominated in inches, these are trade names ( common product name ), and manufacturers construct them to 6.3 mm, 9.5 mm, 12.5 mm and 19 mm, having been rounded to a ...