Specifications

Preface
Intended Audience
This manual is intended for system programmers who want to write an OpenVMS
AXP device driver. A future edition of this book will describe how to write an
OpenVMS AXP device driver in a high-level language.
Associated Documents
The OpenVMS AXP Device Support: Reference contains more detailed information
about the routines and macros mentioned in this book.
Conventions
In this manual, every use of OpenVMS AXP means the OpenVMS AXP operating
system.
The following conventions are also used in this manual:
Ctrl/x A sequence such as Ctrl/x indicates that you must hold down
the key labeled Ctrl while you press another key or a pointing
device button.
PF1 x A sequence such as PF1 x indicates that you must first press
and release the key labeled PF1 and then press and release
another key or a pointing device button.
Return
In examples, a key name enclosed in a box indicates that
you press a key on the keyboard. (In text, a key name is not
enclosed in a box.)
. . . Horizontal ellipsis points in examples indicate one of the
following possibilities:
• Additional optional arguments in a statement have been
omitted.
• The preceding item or items can be repeated one or more
times.
• Additional parameters, values, or other information can be
entered.
.
.
.
Vertical ellipsis points indicate the omission of items from
a code example or command format; the items are omitted
because they are not important to the topic being discussed.
( ) In command format descriptions, parentheses indicate that, if
you choose more than one option, you must enclose the choices
in parentheses.
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