Digital Equipment AXPpci 33, Руководство по конструкции

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Physical Description
Table 2–6 (Cont.) IDE Disk Connector Pin-Out (J18)
Pin
Number
Function
Pin
Number
Function
7 Data 5 8 Data 10
9 Data 4 10 Data 11
11 Data 3 12 Data 12
13 Data 2 14 Data 13
15 Data 1 16 Data 14
17 Data 0 18 Data 15
19 Ground 20 No connection
21 DMA REQ 22 Ground
23 IOWC 24 Ground
25 IORC 26 Ground
27 IO CH RDY 28 Idebale
29 DMA Grant 30 Ground
31 Interrupt 32 IOCS16
33 A1 34 No connection
35 A0 36 A2
37 SEL 0 38 SEL 1
39 Busy 40 Ground
2.2.2.7 ISA Slot Connectors (J20–J24)
The AXPpci 33 supports five ISA option slots (J20–J24). Three slots
support short ISA modules; two support long ISA modules. See Section 2.4
for further details about ISA option modules.
The ISA option in slot 1 (J24) occupies the same bulkhead that the PCI
option in slot 3 (J25) occupies, making the slots mutually exclusive.
For definition of signal and power pin assignments, refer to the ISA
specification referenced in the Preface.
2.2.2.8 Keyboard Connectors (J39 and J38)
The AXPpci 33 is orderable with either the AT style (J39) 5-position
DIN keyboard connector or with a 6-position mini-DIN PS/2 style (J38)
keyboard connector. These connectors are mutually exclusive. The PS/2
style MLB also includes a PS/2 style mouse connector (see J40). Digital
UNIX does not support the serial mouse or AT style keyboard.
CAUTION: Use +5 V for the keyboard or pointing device only. Do not exceed
250 mA.
Table 2–7 lists the pin numbers and functions of the AT style keyboard
connector.
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