Gimix_OS-9_Interactive_Debugger_Jun82.pdf

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MICROWARE
INTERACTIVE DEBUGGER
USERIS MANUAL
INTERACTIVE DEBUGGER
USERIS MANUAL
(C) 1980, 1981,. 1982 Microware Systems Corporation.
All Rights Reserved
This manual, the Interactive Debug Program, and any information
contained herein is the property of Microware Systems Corporation.
Reproduction by any means electrical or otherwise is strictly
prohibited except by prior written permission from Microware
Systems Corporation.
The information contained herein is believed to be accurate as of
the date of publication, however Microware will not be liable for
any damages, including indirect or consequential, resulting from
reliance
upon
the OS-9 Interactive Debug Program or this
documentation.
Fourth Revision
Publication Date:
June 12, 1982
Microware System Corporation
5835 Grand Avenue
Des Moines, Iowa 50312 U.S.A.
Telephone
515-279-8844
Software Support 515-279-8898
Telex
91G-520~2535
OS-9 INTERACTIVE DEBUGGER
Debug Commands
MEMORY COMMANDS
The interact1ve debugger has two memory-related commands to
display large blocks of memory, and to clear and test memory.
Clear and Test Memory Command
The command C followed by TWO expressions simultaneously
performs a nwalking bit n memory test and clears all memory
between the
~wo
evaluated addresses. The first expression gives
the starting address, and the second the ending address (which
must be higher). If any byte(s) fail the test, its address is
displayed~
Of course, only RAM memory can be tested and
cleared.
WARNING: THIS COMMAND CAN BE DANGEROUS FOR OBVIOUS REASONS.
SORE OF
WHAT
MEMORY YOU ARE CLEARING.
Example:
DB: C 1200 l5FF
DB:
C • •
+256 .
Dump Memory Command
The M command, which is also tollowed by two addresses,
displays a screen-sized display of memory contents in tabular
form, in both hexadecimal and ASCII form.. The starting address
of each line is printed on the left, followed by the contents of
the 16 subsequent memory locations. On the far right is the
ASCII representation of the same memory locations.
Those
locatl.ons containing non-displayable characters have periods in
their place.
The high order bit is ignored for the display of
the ascii character.
Search Memory Command
The nSn command is used to search an area of memory for a
one- or two-byte pattern. The search begins at the present Dot
address., The nSn is followed by two expressions: the first
expression is the ending address of the search, and the second
expression is the data to be searched for.
If this value is
less than 256 a one-byte comparison is used, otherwise two bytes
are compared. If a matching pattern is found in memory, Dot is
set to the address where it was located (which is displayed).
If no match occurred, another nDB:- prompt is displayed.
BE
(C) 1980, 1981, 1982 MICROWARE SYSTEMS CORPORATION
page 3-7
OS-9
INTERACTIVE DEBUGGER
Debug Commands
This Page Intentionally Left Blank
(C) 1980,
1981,
19°82 MICROWARE SYSTEMS CORPORATION
Page 3-8

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