Instrucciones 8085 Intel Procesador

8085 INSTRUCTION SET
INSTRUCTION DETAILS
DATA TRANSFER INSTRUCTIONS Opcode Operand Description This instruction copies the contents of the source register into the destination register; the contents of the source register are not altered. If one of the operands is a memory location, its location is specified by the contents of the HL registers. Example: MOV B, C or MOV B, M The 8-bit data isstored in the destination register or memory. If the operand is a memory location, its location is specified by the contents of the HL registers. Example: MVI B, 57H or MVI M, 57H The contents of a memory location, specified by a 16-bit address in the operand, are copied to the accumulator. The contents of the source are not altered. Example: LDA 2034H The contents of the designated register pairpoint to a memory location. This instruction copies the contents of that memory location into the accumulator. The contents of either the register pair or the memory location are not altered. Example: LDAX B The instruction loads 16-bit data in the register pair designated in the operand. Example: LXI H, 2034H or LXI H, XYZ The instruction copies the contents of the memory location pointed out bythe 16-bit address into register L and copies the contents of the next memory location into register H. The contents of source memory locations are not altered. Example: LHLD 2040H

Copy from source to destination MOV Rd, Rs M, Rs Rd, M

Move immediate 8-bit MVI Rd, data M, data

Load accumulator LDA 16-bit address

Load accumulator indirect LDAX B/D Reg. pair

Load register pair immediateLXI Reg. pair, 16-bit data

Load H and L registers direct LHLD 16-bit address

8085 Instruction Set

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Store accumulator direct STA 16-bit address

The contents of the accumulator are copied into the memory location specified by the operand. This is a 3-byte instruction, the second byte specifies the low-order address and the third byte specifies the high-order address. Example:STA 4350H The contents of the accumulator are copied into the memory location specified by the contents of the operand (register pair). The contents of the accumulator are not altered. Example: STAX B The contents of register L are stored into the memory location specified by the 16-bit address in the operand and the contents of H register are stored into the next memory location by incrementingthe operand. The contents of registers HL are not altered. This is a 3-byte instruction, the second byte specifies the low-order address and the third byte specifies the high-order address. Example: SHLD 2470H The contents of register H are exchanged with the contents of register D, and the contents of register L are exchanged with the contents of register E. Example: XCHG

Store accumulatorindirect STAX Reg. pair

Store H and L registers direct SHLD 16-bit address

Exchange H and L with D and E XCHG none

Copy H and L registers to the stack pointer SPHL none The instruction loads the contents of the H and L registers into the stack pointer register, the contents of the H register provide the high-order address and the contents of the L register provide the low-order address. Thecontents of the H and L registers are not altered. Example: SPHL Exchange H and L with top of stack XTHL none The contents of the L register are exchanged with the stack location pointed out by the contents of the stack pointer register. The contents of the H register are exchanged with the next stack location (SP+1); however, the contents of the stack pointer register are not altered. Example:XTHL

8085 Instruction Set

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Push register pair onto stack PUSH Reg. pair

The contents of the register pair designated in the operand are copied onto the stack in the following sequence. The stack pointer register is decremented and the contents of the highorder register (B, D, H, A) are copied into that location. The stack pointer register is decremented again and the contents of...