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Chapter 2
AT7/AT7E
2-16
(12). CD1 and AUX1 Headers: CD Audio and Auxiliary audio signal input headers
These connectors connect to the audio output of
internal CD-ROM drive or add-on card.
(13). FDC1 Connector
This 34-pin connector is called the “floppy disk
drive connector”. You can connect a 360K, 5.25”,
1.2M, 5.25”, 720K, 3.5’’, 1.44M, 3.5” or 2.88M,
3.5” floppy disk drive.
A floppy disk drive ribbon cable has 34 wires and
two connectors to provide the connection of two
floppy disk drives. After connecting the single end
to the FDD1, connect the two connectors on the
other end to the floppy disk drives. In general,
people only install one floppy disk drive on their
computer system.
Note
A red mark on a wire typically designates the location of pin 1. You need to align the wire pin 1 to the
FDC1 connector pin 1, then insert the wire connector into the FDC1 connector.
(14). IDE1, IDE2, IDE3, IDE4, IDE5 and IDE6 Connectors
This motherboard provides two IDE ports (IDE1 & IDE2) to connect up to four IDE devices in Ultra
DMA 133 mode by Ultra DMA 66 ribbon cables. Each cable has 40-pin 80-conductor and three
connectors, providing two hard drive connections with the motherboard. Connect the single end (blue
connector) at the longer length of ribbon cable to the IDE port on motherboard, and the other two ends
(gray and black connector) at the shorter length of the ribbon cable to the connectors on hard drives.
AT7’s built-in HighPoint HPT 374 chipset gives you the capability to support Ultra DMA 133. It
provides four IDE channels (IDE3, IDE4, IDE5 & IDE6) that also support Ultra DMA 133 specifications,
and it allows for eight additional IDE devices in your computer system. Especially, if you want to connect