8085-Data Transfer instructions 8085 Microprocessor by Ravinder Nath Rajotiya - September 1, 2020May 10, 20210 Share on Facebook Share Send email Mail Print Print Data Transfer Instructions: These instructions are used for transferring data items from one source location to another location called destination. The source can be an immediate number, content of a register or memory or even an input from the peripheral and destination can be a register, memory or any peripheral. The different instructions under data transfer category are listed in table below: 1 MVI Reg/Mem,8-bit data Move immediate 8-bit data in reg/memory 2 MOV Rd, Rs Move content of source register to a destination register 3 MOV Rd, M Move content of memory to a destination register 4 LXI Rp,16-bit Data Move 16-bit immediate data to register pair (BC, DE, HL) 5 LDA 16-bit Address Load Accumulator from memory whose 16-bit address is given 6 STA 16-bit Address Store Accumulator from memory whose 16-bit address is given 7 LHLD 16-bit Address Load HL pair direct from memory whose 16-bit address is given 8 SHLD 16-bit Address Store HL pair in memory whose 16-bit address is given 9 LDAX [Rp] Load Accumulator from memory whose 16-bit address is given in Register Pair 10 STAX [Rp] Store Accumulator from memory whose 16-bit address is given in Register Pair 11 XCHG Exchanges content of HL with DE register pair 12 IN #port number Reads a byte of data from input port into the accumulator 13 OUT #port number Outputs the content of Accumulator at the output port 14 PCHL Exchanges contents of PC and HL register pair 15 XTHL exchange stack with HL register pair Example-1: Writa an ALP to transfer a data byte from memory location 2050h and store it at location 2060 h. Answer: Using Direct addressing mode LDA 2050h STA 2060h HLT Indirect addressing Mode LXI D, 2050h LDAX D LXI D, 2060h STAX D HLT Example-2: WAP to load a data byte 58h in accumulator and transfer the byte in register C and also in memory at address 2050h Answer: MVI A, 58h MOV C, A STA 2050h HLT Example-3: WAP in assembly language to exchange the 16-bit data Answer: LXI H, 1234h LXI D, 2345h XCHG HLT Share on Facebook Share Send email Mail Print Print