Personal Computer User Manual

Using the 197Bug Debugger
4-2 Installation Guide
4
The commands are shown using a modified Backus-Naur form syntax. The
meta symbols used are:
Syntactic Variables
The following syntactic variables are encountered in the command
descriptions which follow. In addition, other syntactic variables may be used
and are defined in the particular command description in which they occur.
Expression as a Parameter
An expression can be one or more numeric values separated by the arithmetic
operators: plus (+), minus (-), multiplied by (*), divided by (/), logical AND
(&), shift left (<<), or shift right (>>)
Numeric values may be expressed in either hexadecimal, decimal, octal, or
binary by immediately preceding them with the proper base identifier.
boldface strings A boldface string is a literal such as a command or a program name,
and is to be typed just as it appears.
italic strings An italic string is a “syntactic variable” and is to be replaced by one
of a class of items it represents.
| A vertical bar separating two or more items indicates that a choice
is to be made; only one of the items separated by this symbol
should be selected.
[ ] Square brackets enclose an item that is optional. The item may
appear zero or one time.
{ } Braces enclose an optional symbol that may occur zero or more
times.
DEL Delimiter; either a comma or a space.
EXP Expression (described in detail in a following section).
ADDR Address (described in detail in a following section).
COUNT Count; the syntax is the same as for
EXP.
RANGE A range of memory addresses which may be specified either by ADDR
DEL ADDR or by ADDR : COUNT.
TEXT An ASCII string of up to 255 characters, delimited at each end by the
single quote mark (').