macro_rishabh.pptx
Post on 04-Oct-2015
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8086 Microprocessor
8086 MicroprocessorMacros
Characteristics1) The 8086 is a 16bit processor.Length | Size Name4bit | nibble8bit | byte16bit | word32bit | dword (or doubleword)
Registers8086 Programmers ModelESCSSSDSIPAHBHCHDHALBLCLDLSPBPSIDIFLAGSAXBXCXDXExtra SegmentCode SegmentStack SegmentData SegmentInstruction PointerAccumulatorBase RegisterCount RegisterData RegisterStack PointerBase PointerSource Index RegisterDestination Index RegisterBIU registers(20 bit adder)EU registersInstructions set
Types of Addressing
Macro
What are Macros ? Macros can be defined with MACRO and ENDM
Format macro_name MACRO [parameter1, parameter2, ...] macro body ENDM
A macro can be invoked using macro_name [argument1, argument2, ]
Example: Definition Invocation
multAX_by_16 MACRO ...... sal AX,4 mov AX,27 ENDM multAX_by_16
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