User`s manual

DIGITAL-LOGIC AG MSLB-P5 Manual V0.3
PRELIMINARY 29
2. REFERENCE DOCUMENTS
This EBX specification makes reference to, and is based on, the current versions of the following
specifications:
IEEE P996 Draft Specification: IEEE Standards Office, Piscataway NJ; phone
908-562-3825, fax [phone].
PC/104 and PC/104-Plus Specification: PC/104 Consortium, Mountain View
CA; phone [phone], fax [phone].
PCI Local Bus Specification: PCI Special Interest Group, Hillsboro OR;
phone [phone] or 503-693-6232, fax [phone], email
[e-mail].
PC Card Standard: PCMCIA, San Jose CA; phone [phone], fax 408-433-
9558, email [e-mail].
Technical references about the PCI and ISA buses themselves are available from numerous
sources, including Annabooks (toll free 800-462-1042), the Computer Literacy Bookshops (408-
435-0744), and others.
3. HORIZONTAL DIMENSIONS AND MOUNTING HOLES
Figure 1 in Appendix A provides the detailed horizontal dimensions and mounting hole locations
of the EBX form-factor. With the exception of the four holes labeled “B”, all dimensions
indicated in Figure 1 for board size and mounting holes are mandatory.
3.1 Horizontal Dimensions
The horizontal dimensions of an EBX board are 5.75 x 8.00 inches (146 by 203 mm).
3.2 Mounting Holes
Eight mounting holes are specified. These are marked “A” in Figure 1. Four of these are located
in the corners of the EBX form-factor, and four others correspond to the PC/104-Plus module
mounting locations defined by the PC/104-Plus specification. It is recommended that all eight
defined mounting holes be used to provide rugged attachment of the EBX board to its enclosure
or parent assembly.
Note that the four holes marked “B” in Figure 1 are optional. These holes are for the screws used
to mount a typical PC Card slot connector that meets the mechanical requirements of EBX. The
connector that matches these mounting holes is indicated in Section 4.9 of this document.
3.2 PC/104- Plus Expansion Stack Location
EBX provides a “PC/104-Plus Bus Compatible” module stack location as defined by the PC/104
and PC/104-Plus specifications. This location accepts either PC/104-Plus (PCI) or PC/104 (ISA)
expansion modules, or a combination of both. Figure 1 defines the precise location of the
PC/104-Plus expansion stack location, based on the location of the PC/104-Plus bus connectors
and associated mounting holes. Refer to the PC/104 and PC/104-Plus specifications for
information on the full electrical and mechanical specifications associated with this location.
3.2.1 PC/104- Plus Bus Connectors
PC/104-Plus defines two buses. One is the 104-pin ISA connector pair (J1/J2) which consists of
64-pin and 40-pin pin-and-socket headers with 0.1 in. pin-to-pin spacing. The second bus is the
120-pin PCI connector (J3), a high density pin-and-socket connector with 2mm pin-to-pin
spacing. These bus connectors and their typical vendor part numbers appear in Table 1.
3.2.2 Stackthrough Bus Option
The PC/104-Plus specification defines ether stackthrough or non-stackthrough bus connectors.
An EBX board may be populated with either of these bus options, as indicated in Table 1. When
fitted with stackthrough bus connectors, the EBX board can be plugged onto another circuit
board (often called a “baseboard”) and treated like a single-board computer “macrocomponent”.
3.2.3 PC/104- Plus Keep Out Area
EBX preserves the mandatory “keep out” areas defined by the PC/104-Plus specification.