The standard EV3 File block can read data from a .rft file. The Wheel VM reads code from an .rtf file with the following structure:
| Size | Expected value | Description |
|---|---|---|
| 1 | Wheel VM Program | Header |
| 1 | #VERSION | Version marker |
| 1 | 1 | Version value |
| 1 | #NAME | Program name |
| 1 | Name | Program name value |
| 1 | #STRINGS | String marker |
| 1 | Count | Number of strings |
| [String data] | ||
| 1 | #CONSTANTS | Constant marker |
| 1 | Count | Number of constants |
| [Constant data] | ||
| 1 | #HEAP | Heap marker |
| 1 | Number value | Heap size value |
| 1 | #REG_CODE | Code register value marker |
| 1 | Number value | Initial code register value |
| 1 | #REG_STACK | Stack register value marker |
| 1 | Number value | Initial stack register value |
| 1 | #COMMANDS | Command values marker |
| 1 | Count | Number of commands |
| [Command data] | ||
Each constant constists of at least three values: the offset, the number of constants followed by the constants.
| Size | Expected value | Description |
|---|---|---|
| 1 | Offset | The absolute memory location of the constant data |
| 1 | Count | Number of constants |
| [Constant values] | ||
A single command is stored as 3 numbers:
The first number is 8 bits, the 4 high bits store the command, followed by two bits for the first parameter type followed by two bits for the second parameter type. A command and parameter type information can be stored in a single byte.
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
|---|---|---|---|---|---|---|---|
| Command | Type1 | Type2 | |||||
