HPlogo System Debug Reference Manual > Appendix C Emulated/Translated CM Code

Executing a Translated Section

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E0201 Edition 4 ♥
E0300 Edition 3
E0692 Edition 3

The following diagram indicates that the NM program counter (pc >) is located at the start (node point) of a NM translated section of code.

When all of the instructions in this section are executed, (that is, when pc advances to the next node point at PROC+%6), then the state of the machine is exactly the same as if the four original CM object code instructions had been executed (PROC+%2 through PROC+%6). 

           Original CM                          Translated
           Object Code                          Object Code
                               Translated
                                  Into
           CM Instructions                      NM Instructions

                                                +-------------+
                                                | PROC+%0     | N
                                                |             |
           | ----------- |      ----+           |             |
         N | PROC+%2     |          |           |             |
           | PROC+%3     |          +----       | ----------- |
           | PROC+%4     |                pc >  | PROC+%2     | N
           | PROC+%5     |                      |             |
           | ----------- |      ----+           | Translated  |
                                    |           | Section     |
                                    |           |             |
                                    +----       | ----------- |
                                                | PROC+%6     | N
                                                |             |
                                                |             |
                                                |             |
                                                | ----------- |
                                                | PROC+%13    | N
                                                |             |
                                                |             |
                                                |             |
                                                |             |
                                                |             |
                                                |             |
                                                |             |
                                                +-------------+
Note that if, for example, only half of the NM translated section has been executed, it is not equivalent to emulating the first half of the original CM object code instructions.

NOTE: There may not be any correspondence between the relative position and sizes of emulated versus translated code sections.



Node Points in Translated Code

The Node Functions