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34 CommPlete 4000 Communications Server User Guide
Appendices
Hard Disk Connector
This connector supplies hard disk drive signals which interface with the software I/O drivers to
provide the read/write functions.
40
1
2
39
Figure A-7. Hard Disk Connector
Pin Description Pin Description
1 /Reset 21 NC
2 Ground (GND) 22 Ground (GND)
3 Data Bit 7 (SD7) 23 -I/O Write (-IOW)
4 Data Bit 8 (SD8) 24 Ground (GND)
5 Data Bit 6 (SD6) 25 -I/O Read (-IOR)
6 Data Bit 9 (SD9) 26 Ground (GND)
7 Data Bit 5 (SD5) 27 IOCHRDY
8 Data Bit 10 (SD10) 28 ALE\
9 Data Bit 4 (SD4) 29 NC
10 Data Bit 11 (SD11) 30 Ground (GND)
11 Data Bit 3 (SD3) 31 IRQ14
12 Data Bit 12 (SD12) 32 /IOCS16
13 Data Bit 2 (SD2) 33 Address Bit 1 (SA1)
14 Data Bit 13 (SD13) 34 NC
15 Data Bit 1 (SD1) 35 Address Bit 0 (SA0)
16 Data Bit 14 (SD14) 36 Address Bit 2 (SA2)
17 Data Bit 0 (SD0) 37 Chip Select 0 (-CS0)
18 Data Bit 15 (SD15) 38 Chip Select 1 (-CS1)
19 Ground (GND) 39 /HDLED
20 NC 40 Ground (GND)