Syntax: SUI 8-bit Where 8-bit is an immediate data operand. Byte: 2byte Addressing Mode: Immediate Addressing Working: 1. 2. 3. 4. Flag Example: SUI 11H where [A]= 22H After execution of SUI 11H [A] = 11H Program: write an ALP for 8bit subtraction of value present in Register A that is 44H with an immediate value 30H. Store result at memory location 5000H. Label Mnemonics Comments Start: SUI 30H STA 5000H Stop: HLT Output: [5000H]= 14H
Syntax: STA 16-bit Where 16-bit is for memory location. Byte: 3byte Addressing Mode: Direct Addressing Working: for execution of this instruction, microprocessor will allocate first byte for opcode, second byte for lower order address and third byte for higher order address. After execution, the content of Accumulator will be moved to the given address. Example: STA 2000H where [A]= A0 H After execution of STA 2000H [2000H]= A0 H
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