Conventions

Page iii

Conventions

Notational

Graphic

This manual incorporates the following conventions:

1.An upper case letter H following a number indicates the number is a hexadecimal value (e.g., 32 = 20H and 255 = FFH).

2.In this document, a byte is defined as an 8-bit quantity, a word as a 16- bit quantity, and a double word as a 32-bit quantity.

3.This manual represents all memory ordering in the Motorola format. This means that the least significant byte of a double word is placed in the most significant memory location. For a further discussion of memory ordering and information to use Intel ordering, see Chapter 8.

4.The title of this manual, and all references to the adapter throughout, express the name of the product as Rimfire 3880. This name is a base model number representing a series of product offerings with differences that are noted in the text of this manual when pertinent.

To explain the RF3880 command structures and describe the breakdown of the command structure into fields, (double-word, word, and byte wide) this manual represents the command structures and fields graphically, as they would be placed in memory.

Throughout this User’s Guide you will find the command structures graphically represented as shown below.

Address

 

Byte Memory Address

 

 

Offset

Offset + 0

Offset + 1

Offset + 2

 

Offset + 3

 

 

00H

 

Double-word

 

 

 

 

 

 

 

 

04H

Byte

Byte

 

Word

 

 

 

 

 

 

08H

 

 

 

 

 

 

 

 

 

 

 

0CH

 

 

 

 

 

 

 

 

 

 

 

10H

 

 

 

 

 

 

 

 

 

 

 

14H

 

 

 

 

 

 

 

 

 

 

 

18H

 

 

 

 

 

Table 1: Graphic Representation of Parameter Block

The left hand column and top two rows of the above table provide a reference for the position of the components of the structure in memory.

Address Offset - The grey-shaded area on the left is named Address Offset. Since the structures are double-word wide, these hexadecimal values, added to the Starting Memory Address, reference the beginning of each double word in the structure.

Byte Memory Address - The area at the top of the graphic is the Byte Memory Address. This displays the ordering of byte-wide fields of memory. Each of the four “Offset + x” fields describes the relationship of byte fields to the Address Offset.

User’s Guide

21020285 D

Page 7
Image 7
Ciprico Rimfire 3880 Conventions, Notational Graphic, Graphic Representation of Parameter Block, User’s Guide 21020285 D