Digital Equipment AXPpci 33, Design Manual

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Physical Description
2.2.2.12 Parallel Port Connector (J36)
This is a parallel port 26-position (2 x 13) connector (J36). You can add an
adapter cable from this MLB connector to an appropriate user connector, if
required. You can interface the pin-out of this connector to a 25-position D
connector using insulation displacement connectors (IDCs) on both ends.
Table 2–13 lists the pin numbers and functions of the parallel port
connector.
Table 2–13 Parallel Port Connector Pin-Out (J36)
Pin
Number
Function
Pin
Number
Function
1 STROBE L 14 AUTOFD L
2 Data 0 15 ERROR L
3 Data 1 16 INIT L
4 Data 2 17 SLCTIN L
5 Data 3 18 Ground
6 Data 4 19 Ground
7 Data 5 20 Ground
8 Data 6 21 Ground
9 Data 7 22 Ground
10 ACK 23 Ground
11 Busy 24 Ground
12 PE 25 Ground
13 Select 26 No pin installed
2.2.2.13 PCI Slot Connectors (J25–J27)
The AXPpci 33 supports three PCI option slots (5 V/32 bit). Connector
J34 connects 3.3 V to 3.3 V capable PCI cards. One slot supports a short
PCI module; two support long PCI modules. The PCI option components
in PCI slot 3 (J25) occupy the same space the ISA option in ISA slot 1
(J24) would occupy, making the slots mutually exclusive. For definitions
of the signal and power pin assignments, see the document PCI Local Bus
Specifications referred to in the Preface. For further information about
PCI option modules, see Section 2.5.
2.2.2.14 SCSI/IDE Busy LED Connector (J14)
The 4-position (1 x 4) J14 connector provides the BUSY L signal to drive a
LED that indicates bus traffic on either the SCSI bus or IDE bus.
Table 2–14 lists the pin numbers and functions of the SCSI/IDE Busy LED
connector.
2–14