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ECE-567-02 - M68HC11 Programmers Model SU 2005 EE 567...

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SU 2005 EE EE 567 Microprocessor Labs 1 2 - M68HC11 M68HC11 Programmer’s Model Programmer’s Model
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SU 2005 EE EE 567 Microprocessor Labs 2 2 - M68HC11 M68HC11 Number Formats Number Formats Prefix Type of Data % Binary @ Octal none Decimal $ Hexadecimal Ascii
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SU 2005 EE EE 567 Microprocessor Labs 3 2 - M68HC11 M68HC11 Instruction Format Instruction Format LABEL OPCODE OPERAND SCAN JSR $0100
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SU 2005 EE EE 567 Microprocessor Labs 4 2 - M68HC11 M68HC11 Addressing Modes Addressing Modes Immediate (IMM) # indicator; takes actual value Inherent (INH) Part of opcode Extended (EXT) Full, 2-byte address Direct (DIR) 1-byte address, (upper byte assummed $00); faster than extended Relative (REL) 2’s complement number added to program counter Indexed (INDX, INDY) Offset added to argument Note : Except the IMM & INH modes each modes generates a double byte effective address. The effective address is the address where data is located.
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SU 2005 EE EE 567 Microprocessor Labs 5 2 - M68HC11 M68HC11 Addressing Modes Addressing Modes Immediate (IMM) LDAA #25
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