One,Two and Three byte Instructions

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One Byte Instructions needs only one Byte of memory for execution.
Here, in these instructions, general purpose registers are used as operands i.e. Source Register Rs and Destination Register Rd.
Example: MOV , LDAX, STAX, XCHG

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SUI

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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                        
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ADD

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Syntax: ADD R Where R can be any of the general purpose registers (A,B,C,D,E,H andL) Byte: 1byte Addressing Mode: Register   Addressing Working:  1.  2.  3.  4. Flag Example: ADD B   where  [B] = 22H  and [A]= 11H After execution of ADD B [A] = 33H  [B] = 22H Program: write an ALP for 8bit addition of values present in Registers A and B where A carries 44H and B carries 30H. Store result at memory location 5000H. Label  Mnemonics  Comments Start: ADD B            STA 5000H   Stop: HLT Output: [5000H]= 74H LXI H, 4000H ; 4000= 50h MOV A,M ; a = 50h INX H ; 4001h where 4001= 90h MOV B, M ; b= 90h ADD B ; a = a+b ... A = 50+90= E0h INX H ; 4002h MOV M,A ; 4002h = E0h HLT            
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