diff --git a/BrotherSystemVariables.md b/BrotherSystemVariables.md
index 0d5e135..8c05983 100644
--- a/BrotherSystemVariables.md
+++ b/BrotherSystemVariables.md
@@ -12,8 +12,8 @@
 |F         | #9        |
 |G         | -         |
 |H         | #11       |
-|I         |           |
-|J         | #4        |
+|I         | #4          |
+|J         | #5        |
 |K         | #6        |
 |L         | -         |
 |M         | 13        |
@@ -60,6 +60,14 @@ The extended WCS start at #7000 - #7006 and increment by 20 for each new WCS val
 | ...              | ...           |
 | G54.1P48         | #7941 - #7946 |
 
+or D00 controls, 300 extended WCS are available.
+
+| WCS              |  Parameters     |
+|------------------|-----------------|
+| G54.1P1          | #14001 - #14006 |
+| G54.1P2          | #14021 - #14026 |
+| ...              | ...             |
+| G54.1P48         | #19981 - #19986 |
 
 Note: Most Brother macros expect a negative value when passing in an extended WCS offset number. 
 So `G54.1P1` is referenced by `W-1` in a macro call. 
@@ -69,7 +77,10 @@ To compute the register value in a macro, use this equation (where W is the WCS
 ```
 parameter# = 7001 + (-W-1 * 20)
 ```
-
+For D00:
+```
+parameter# = 14001 + (-W-1 * 20)
+```
 
 ### Sample WCS Register Calculation in MACRO
 
@@ -96,4 +107,80 @@ N2 #100 = #[5221+[#23-54]*20]
 GOTO3
 
 N3
-```
\ No newline at end of file
+```
+
+
+### Positional Variables
+Machine Coordinate System (Tool Offseet Included):
+
+| Variable #     |  WCS Coordinate |
+|----------------|-----------------|
+| #5021          | X               |
+| #5022          | Y               |
+| #5023          | Z               |
+| #5024~#5028    | Additional Axes |
+
+Workpiece Coordinate System (Tool Offseet Included):
+
+| Variable #     |  WCS Coordinate |
+|----------------|-----------------|
+| #5041          | X               |
+| #5042          | Y               |
+| #5043          | Z               |
+| #5044~#5048    | Additional Axes |
+
+Skip Signals (Tool Offseet Included):
+
+| Variable #     |  WCS Coordinate  |
+|----------------|------------------|
+| #5061          | X                |
+| #5062          | Y                |
+| #5063          | Z                |
+| #5064~#5068    | Additional Axes  |
+
+### Usefull System Variables 
+
+| Variable #     |  Description     |
+|----------------|------------------|
+| #11001~#11099  | T01~T99          |
+| #11201~#11299  | T201~T299        |
+| #4120          | T Code           |
+| #4111          | H Code           |
+| #3801 ~ #3804  | Workpiece counter 1 Count, Current, Completion, Ending|
+| #3811 ~ #3814  | Workpiece counter 2 Count, Current, Completion, Ending|
+| #3821 ~ #3824  | Workpiece counter 3 Count, Current, Completion, Ending|
+| #3831 ~ #3834  | Workpiece counter 4 Count, Current, Completion, Ending|
+
+
+### Useful G/M Codes
+
+| Code        |  Description                   | Modal/Oneshot |
+|-------------|--------------------------------|---------------|
+| M159        | Disable lookahead (one block)  | One-Shot      |
+| M211 ~ M214 | Workpiece Counter 1 ~ 4 set    | Modal         |
+| M221 ~ M224 | Workpiece Counter 1 ~ 4 cancel | Modal         |
+| M252 ~ M254 | Tap accel constant Hi/Med/Low  | Modal         |
+| M300, M301  | Z-axis Perimeter Mode (Z hop)  | Modal         |
+| M442, M443  | Unclamp, Clamp A axis          | Modal         |
+| M442, M443  | Unclamp, Clamp A axis          | Modal         |
+| M442, M443  | Unclamp, Clamp A axis          | Modal         |
+
+### High Accuracy Machine Modes (M298)
+
+| Code        |  Description     |
+|-------------|------------------|
+| M298 L0     | Off              |
+| M298 L1     | Standard         |
+| M298 L2     | Rough            |
+| M298 L3     | Medium Rough     |
+| M298 L4     | Medium Rough S   |
+| M298 L5     | Finishing        |
+| M298 L6     | Finishing S      |
+| M298 L7     | Adjustment A     |
+| M298 L8     | Adjustment B     |
+| M298 L9     | Adjustment C     |
+| M298 L21    | Accuracy Spec. A |
+| M298 L22    | Accuracy Spec. B |
+| M298 L23    | Accuracy Spec. C |
+
+