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8085/8085A Microprocessor)

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8085 / 8085A
Pin Diagram

8085 Architecture Pin Diagram

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|                                                              |

|                                                              |

|                            Intel                             |

|                                                              |

|         88888      000      88888    5555555      A          |

|        8     8    0   0    8     8   5           A A         |

|        8     8   0   0 0   8     8   5          A   A        |

|         88888    0  0  0    88888    555555    AAAAAAA       |

|        8     8   0 0   0   8     8         5   A     A       |

|        8     8    0   0    8     8         5   A     A       |

|         88888      000      88888    555555    A     A       |

|                                                              |

|         8085A MICROPROCESSOR Instruction Set Summary         |

|                                                              |

|                                                              |

|                                                              |

|                                                              |

|                                                              |

|                    _________    _________                    |

|                  _|         \__/         |_                  |

|          --> X1 |_|1                   40|_| Vcc (+5V)       |

|                  _|                      |_                  |

|          --> X2 |_|2                   39|_| HOLD <--        |

|                  _|                      |_                  |

|   <-- RESET OUT |_|3                   38|_| HLDA -->        |

|                  _|                      |_                  |

|         <-- SOD |_|4                   37|_| CLK (OUT) -->   |

|                  _|                      |_  ________        |

|         --> SID |_|5                   36|_| RESET IN <--    |

|                  _|                      |_                  |

|        --> TRAP |_|6                   35|_| READY <--       |

|                  _|                      |_     _            |

|     --> RST 7.5 |_|7                   34|_| IO/M -->        |

|                  _|                      |_                  |

|     --> RST 6.5 |_|8                   33|_| S1 -->          |

|                  _|                      |_  __              |

|     --> RST 5.5 |_|9                   32|_| RD -->          |

|                  _|                      |_  __              |

|        --> INTR |_|10      8085A       31|_| WR -->          |

|            ____  _|                      |_                  |

|        <-- INTA |_|11                  30|_| ALE -->         |

|                  _|                      |_                  |

|        <--> AD0 |_|12                  29|_| S0 -->          |

|                  _|                      |_                  |

|        <--> AD1 |_|13                  28|_| A15 -->         |

|                  _|                      |_                  |

|        <--> AD2 |_|14                  27|_| A14 -->         |

|                  _|                      |_                  |

|        <--> AD3 |_|15                  26|_| A13 -->         |

|                  _|                      |_                  |

|        <--> AD4 |_|16                  25|_| A12 -->         |

|                  _|                      |_                  |

|        <--> AD5 |_|17                  24|_| A11 -->         |

|                  _|                      |_                  |

|        <--> AD6 |_|18                  23|_| A10 -->         |

|                  _|                      |_                  |

|        <--> AD7 |_|19                  22|_| A9 -->          |

|                  _|                      |_                  |

|       (Gnd) Vss |_|20                  21|_| A8 -->          |

|                   |______________________|                   |

|                                                              |

|                                                              |

|--------------------------------------------------------------|

 

Instructions can be categorized according to their method of addressing the hardware registers and/or memory.

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