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| <TITLE>Memory Window Help</TITLE> |
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| <H1> |
| The Memory Window</H1> |
| The Memory Window allows users to display and edit the contents of memory. |
| The Memory Window Preferences controls all of the display characteristics |
| of the Memory Window. |
| <BR> |
| <LI> |
| <A HREF="#menus">Address Menu</A></LI> |
| |
| <LI> |
| <A HREF="#display">Memory Display</A></LI> |
| |
| <LI> |
| <A HREF="#prefs">Memory Window Preferences</A></LI> |
| |
| <H2> |
| |
| <HR WIDTH="100%"></H2> |
| |
| <H2> |
| <A NAME="menus"></A>Address Menu</H2> |
| <IMG SRC="images/mem_menu.gif" HEIGHT=66 WIDTH=160> |
| <P>This pulldown menu contains the following three items. |
| <DL> |
| <DT> |
| <A NAME="menus_auto"></A>Auto Update</DT> |
| |
| <DD> |
| When selected, causes the Memory Window to update the display every. |
| If it is not selected, the display will be frozen until it is selected |
| or "Update Now" is selected.</DD> |
| |
| <DT> |
| <A NAME="menus_now"></A>Update Now</DT> |
| |
| <DD> |
| Forces the Memory Window to update the display immediately.</DD> |
| |
| <DT> |
| <A NAME="menus_prefs"></A>Preferences</DT> |
| |
| <DD> |
| Opens the <A HREF="#prefs">Memory Window Preferences</A> dialog.</DD> |
| </DL> |
| |
| <H2> |
| |
| <HR WIDTH="100%"></H2> |
| |
| <H2> |
| <A NAME="display"></A>Memory Display</H2> |
| Like the <A HREF="register.html">Register Window</A>, the Memory Window |
| display is organized into a spreadsheet. The address of any cell in the |
| Display can be determined by appending the row and column headers for the |
| cell. Optionally, an ASCII display of the memory appears at the right. |
| Any non-ASCII-representable byte in memory will appear in the ASCII Display |
| as a control character (a dot, ".", by default). The <A HREF="#pref">Memory |
| Preferences Dialog</A> may be used to alter the appearance of the Memory |
| Window. |
| <P><A NAME="display_nav"></A>To navigate the Memory Window, use the mouse |
| and click the cell of interest. As an alternative, pressing the arrow keys |
| on the keyboard will focus successive cells, from left to right, top to |
| bottom. The focus will wrap from left to right, so hitting the right arrow |
| key will keep advancing the address of the cell selected. |
| <H4> |
| <A NAME="display_edit"></A>Editing Memory</H4> |
| To edit memory, simply enter the new value of the memory into the cell |
| and press the enter key on the keyboard. As with the |
| <A HREF="register.html">Register |
| Window</A>, be careful of the input format used to enter data -- the debugger |
| is capable of parsing binary, octal, decimal, and hexadecimal values. All |
| entries will be padded with leading zeroes, if necessary. After you |
| hit enter, the memory window will automatically shift focus to the next |
| cell. |
| <P>To edit part of the value of a cell, you can use the mouse to poistion |
| the cursor to the exact part of the value you want to change. You |
| can also use the backspace key to delete part of the value without deleting |
| the whole value. |
| <P>Another way to edit memory is to edit the ASCII window. To do |
| this, select a cell using the mouse. Then type in a new string. |
| <H4> |
| <A NAME="display_popup"></A>Memory Pop-up Menu</H4> |
| Clicking the right mouse button while the mouse cursor lies within the |
| bounds of any cell brings up the following menu: |
| <P><IMG SRC="images/mem_popup.gif" HEIGHT=100 WIDTH=220> |
| <DL> |
| <DT> |
| Auto Update</DT> |
| |
| <DL> |
| <DT> |
| When selected, the Memory Window will track changes in memory shown in |
| the Display. When not selected, the Memory Window is "frozen", representing |
| a "snapshot" of memory.</DT> |
| </DL> |
| |
| <DT> |
| Update Now</DT> |
| |
| <DL> |
| <DT> |
| Forces the Memory Window to update the display immediately.</DT> |
| </DL> |
| |
| <DT> |
| Go To <I>address</I></DT> |
| |
| <DD> |
| The Memory Window Display is updated to show memory starting at address |
| <I>address</I>.</DD> |
| |
| <DT> |
| Open New Window at <I>address</I></DT> |
| |
| <DD> |
| A new Memory Window is opened, displaying memory at address <I>address</I></DD> |
| |
| <DT> |
| Preferences...</DT> |
| |
| <DD> |
| Opens the Memory Window Preferences for editing the appearance of the Memory |
| Window Display.</DD> |
| </DL> |
| |
| <H2> |
| |
| <HR WIDTH="100%"></H2> |
| |
| <H2> |
| <A NAME="prefs"></A>Memory Window Preferences</H2> |
| Memory Window Preference Dialog governs the appearance of the Memory Window: |
| the total number of bytes displayed, the size of each cell, ASCII control |
| character. |
| <P><IMG SRC="images/mem_pref.gif" HEIGHT=417 WIDTH=330> |
| <H4> |
| <A NAME="prefs_size"></A>Size of the Display Cells</H4> |
| This attribute controls how many bytes appear in each cell. Valid cell |
| sizes in the Memory Window may be: |
| <DL> |
| <DT> |
| Byte</DT> |
| |
| <DD> |
| Each cell is exactly one byte</DD> |
| |
| <DT> |
| Half Word</DT> |
| |
| <DD> |
| Cells are displayed with two bytes</DD> |
| |
| <DT> |
| Word</DT> |
| |
| <DD> |
| Each cell contains four bytes</DD> |
| |
| <DT> |
| Double Word</DT> |
| |
| <DD> |
| Cells contain eight bytes</DD> |
| |
| <DT> |
| Float</DT> |
| |
| <DD> |
| Each cell contains four bytes, displayed as a floating point number</DD> |
| |
| <DT> |
| Double Float</DT> |
| |
| <DD> |
| Cells are displayed as floating point, eight bytes each</DD> |
| </DL> |
| |
| <H4> |
| <A NAME="prefs_fmt"></A>Format of the Display Cells</H4> |
| The Format option of the Memory Preferences Dialog governs how the debugger |
| represents the memory. Possible representations include: |
| <DL> |
| <DT> |
| Binary</DT> |
| |
| <DD> |
| The values are shown as binary numbers</DD> |
| |
| <DT> |
| Signed Decimal</DT> |
| |
| <DD> |
| The values are shown as signed decimal numbers</DD> |
| |
| <DT> |
| Octal</DT> |
| |
| <DD> |
| Each cell is represented as an octal number</DD> |
| |
| <DT> |
| Unsigned Decimal</DT> |
| |
| <DD> |
| Values are displayed as unsigned decimals</DD> |
| |
| <DT> |
| Hex</DT> |
| |
| <DD> |
| Memory is displayed as a hexadecimal number. This is the default.</DD> |
| </DL> |
| |
| <H4> |
| <A NAME="prefs_bytes"></A>Size of the Memory Window</H4> |
| The size of the memory window determines how much memory is actually presented |
| to the user. The total number of bytes shown can either be determined by |
| the size of the window, in which case resizing the Memory Window will cause |
| more or less memory to be displayed, or fixed at some specified number |
| of bytes. By default, the Memory Window shows 128 bytes of memory. |
| <H4> |
| <A NAME="prefs_misc"></A>Miscellaneous</H4> |
| Miscellaneous memory preferences include the option to display the ASCII |
| representation of the memory, including what character to use for non-ASCII |
| bytes (the "control" character). Additionally, users may specify the number |
| of bytes per row, either by typing a number into the box or by choosing one |
| from the list. The default is sixteen bytes per row. If the entered value is |
| not a multiple of the cell size then it will be automatically rounded up. The |
| maximum permitted value is 150 (before rounding). |
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