CHAPTER 8: DEBUGGER

8.9.6 Register Operationrd (register display)

Function

This command displays the contents of the registers, execution cycle counter, and watch data.

 

Format

 

 

 

>rd↵

(direct input mode)

 

 

 

 

 

Display

 

 

 

 

 

(1) Contents of display

The following lists the contents displayed by this command.

PC:

Program counter

A:A register

B:B register

X:Contents of X register and indirectly addressed data memory

Y:Contents of Y register and indirectly addressed data memory

EICZ: Flags

SP1:

Stack pointer SP1

SP2:

Stack pointer SP2

EXT:

EXT register

QUEUE:

QUEUE register

bus cycle: Execution cycle counter

[xxxx]:

Watch data at four locations

∗If the memory locations indicated by the X and Y registers are in an unused area, the data in that area is marked by an "∗ " as it is displayed.

Note that watch data is always displayed even if it resides in an unused area (indeterminate).

(2)When [Register] window is opened

When the [Register] window is opened, all the above contents are displayed in the [Register] window according to the program execution. When you use the rd command, the displayed contents of the [Register] window is updated.

(3)When [Register] window is closed

Data is displayed in the [Command] window in the following manner:

>rd↵

PC:0110 A:A B:A X:[AAAA] = * Y:[AAAA] = * EICZ:0000 SP1:AA SP2:AA EXT:AA QUEUE:AAAA bus cycle:000002AB3D cycle

[0000] = 0000 [0010] = AAAA [0014] = AAAA [0018] = AAAA

>

(4)During log output

If a command execution result is being output to a log file by the log command, the register values are displayed in the [Command] window even if the [Register] window is opened and are also output to the log file.

GUI utility

[View Register] menu item

When this menu item is selected, the [Register] window opens or becomes active and displays the current register contents.

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S5U1C63000A MANUAL

 

 

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