Application Information; Vme Services Updates; Vme Systems Design Considerations For Models 743, 744, And 748 - HP 743 Series Technical Reference Manual For Oems

Product Design Considerations

Application Information

Application Information
This section contains information on VME Services updates and VME system design consid-
erations.

VME Services Updates

At HP-UX release 10.10 and later, VME Services ships as part of the standard operating sys-
tem.
For HP-UX release 9.05 and 9.07, updates to HP-UX Version 9.05 VME Services are avail-
able from Hewlett-Packard.
Updates include the following:
• Enhanced driver functionality essential for trouble-free VME applications
• Improved error messages
• On-line man pages
• Support for Model 743 VMEbus Board Computers and Model 748 Ruggedized Worksta-
tions
Also available is information that you might need to help you design and configure your
VME system to work properly with the Models 743 and 748. A brief description of these
VME system design considerations follows. More detailed information and information that
becomes available after the printing of this manual is available on request. Please review this
information before configuring your VME system or if you are having trouble getting your
VME configuration to work properly.
Details on how to get VME Services Updates and Design Consideration information are
available through the World Wide Web.
http://www.hp.com/go/hp_vme

VME Systems Design Considerations for Models 743, 744, and 748

This section provides a brief overview of some design considerations when configuring
VME system with Models 743, 744, or 748. This overview will help you determine whether
these considerations are relevant to your VME system. More detailed information is avail-
able on request.
Data Transfer Considerations
The sections that follow discuss data transfers within the VME system.
VME Data Lines During Write Cycle The VME data lines need to remain stable during the entire
write cycle from a non-Model 743/744 VME bus master to the main memory of a Model 743/744
serving as a VME slave. This period includes the time from the assertion of the data strobe by the mas-
ter to the receipt of the DTACK from the Model 743/744. All data lines need to remain stable in all
transactions, including the higher order data lines unused in a D08 or D16 data transaction.
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