Epson S5U1C63000A - Manual (Page 188)

CHAPTER 8: DEBUGGER
174 EPSON S5U1C63000A MANUAL
(S1C63 FAMILY ASSEMBLER PACKAGE)
8.9.6 Register Operation
rd
(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.