WOODWARD 5466-017 Distributed control card

When observing output from any 167Bug command, the XON and XOFF characters which are in effect for the terminal port may be entered to control the output, if the XON/XOFF protocol is enabled (default). These characters are initialized to ^S and ^Q respectively by 167Bug, but you may change them with the PF command. In the initialized (default) mode When a command is entered, the debugger executes the command and the prompt reappears. However, if the command entered causes execution of user target code, for example GO, then control may or may not return to the debugger, depending on what the user program does. For example, if a breakpoint has been specified, then control returns to the debugger when the breakpoint is encountered during execution of the user program. Alternately, the user program could return to the debugger by means of the TRAP #496 function

Debugger Command Syntax

 In general, a debugger command is made up of the following parts: 

❏ The command identifier (i.e., MD or md for the Memory Display command). Note that either upper- or lowercase is allowed. 

❏ A port number if the command is set up to work with more than one port. 

❏ At least one intervening space before the first argument. 

❏ Any required arguments, as specified by the command.

❏ An option field, set off by a semicolon (;) to specify conditions other than the default conditions of the command

The commands are shown

 using a modified Backus-Naur form syntax. The metasymbols used are: 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.

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