Keyboard Connector - Dell PRECISION 610 User Manual

B-12 Dell Precision 610 Mini Tower Systems User's Guide
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55 ATN
56 GND
57 BSY
58 ACK
59 RST
60 MSG
61 SEL
62 C/D
63 REQ
64 I/O
65 D8
66 D9
67 D10
68 D11
Your system uses a Personal System/2 (PS/2)-style keyboard and supports a PS/2-
compatible mouse. Cables from both devices attach to 6-pin miniature Deutsche Indus-
trie Norm (DIN) connectors on the back panel of your computer.
A PS/2-compatible mouse works identically to an industry-standard serial mouse or
bus mouse except that it has its own dedicated connector, which frees up both serial
ports and does not require an expansion card. Circuitry inside the mouse detects the
movement of a small ball and relays the direction to the computer.
Mouse driver software can give the mouse priority with the processor by issuing
IRQ12 whenever a new mouse movement is made. The driver software also passes
along the mouse data to the application program that is in control.
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If you reconfigure your hardware, you may need pin number and signal information for
the keyboard connector. Figure B-6 illustrates the pin numbers for the keyboard con-
nector, and Table B-6 lists and defines the pin assignments and interface signals for
the keyboard connector.
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I/O SCSI attention
N/A Signal ground
I/O SCSI busy
I/O SCSI acknowledge
I/O SCSI reset
I/O SCSI message
I/O SCSI select
I/O SCSI command/data
I/O SCSI request
I/O SCSI in/out
I/O SCSI data bit 8
I/O SCSI data bit 9
I/O SCSI data bit 10
I/O SCSI data bit 11