HPlogo System Debug Reference Manual: HP 3000 MPE/iX Computer Systems > Appendix C Emulated/Translated CM Code

The Node Functions

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Four special functions (CMNODE, CMTONMNODE, NMNODE, NMTOCMNODE) are provided to locate the nearest "previous" and "next" nodes for translated code.

The following diagram shows CM object code loaded at %12.0 with its corresponding NM translated code loaded at $1c.34b0. Node points are flagged with an "N".

              Original CM                                 Translated

              Object Code                                 Object Code



              CM Instructions                             NM Instructions

Seg.Off                                   Sid.Off

              +-------------+                             +-------------+

%12.0       N | PROC+%0     |             $1c.34b0      N | PROC+%0     |

%12.1         | PROC+%1     |             $1c.34b4        |             |

%12.2       N | PROC+%2     |  ---+       $1c.34b8        |             |

%12.3         | PROC+%3     |     |       $1c.34bc        |             |

%12.4         | PROC+%4     |     +-->    $1c.34c0      N | PROC+%2     |

%12.5         | PROC+%5     |             $1c.34c4        |             |

%12.7       N | PROC+%6     |  <--+       $1c.34c8        |             |

%12.10        | PROC+%7     |     |       $1c.34cc        |             |

%12.11        | PROC+%10    |     |       $1c.34d0        |             |

%12.12        | PROC+%11    |     +---    $1c.34d4      N | PROC+%6     |

%12.13        | PROC+%12    |             $1c.34d8        |             |

%12.14      N | PROC+%13    |             $1c.34dc        |             |

%12.15        | PROC+%14    |             $1c.34e0        |             |

%12.16        | PROC+%15    |             $1c.34e4      N | PROC+%13    |

%12.17        | PROC+%16    |             $1c.34e8        |             |

              +-------------+             $1c.34ec        |             |

                                          $1c.34f0        |             |

                                          $1c.34f4        |             |

                                          $1c.34f8        |             |

                                          $1c.34fc        |             |

                                          $1c.3500        +-------------+







CMNODE(%12.4)            = %12.2         NMNODE($1c.34dc)           = $1c.34d4

CMNODE(%12.4,"prev")     = %12.2         NMNODE($1c.34dc,"prev")    = $1c.34d4

CMNODE(%12.4,"next")     = %12.7         NMNODE($1c.34dc,"next")    = $1c.34e4



CMTONMNODE(%12.4)        = $1c.34c0      NMTOCMNODE($1c.34dc)        = %12.7

CMTONMNODE(%12.4,"prev") = $1c.34c0      NMTOCMNODE($1c.34dc,"prev") = %12.7

CMTONMNODE(%12.4,"next") = $1c.34d4      NMTOCMNODE($1c.34dc,"next") = %12.14
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