What is the use of PCHL instruction in 8085?
PCHL is an unconditional branch where control of program is transferred to memory address equivalent to [HL] register pair content. RST n is equivalent to a subroutine call, in which the content of the program counter is saved in the stack i.e. the program jumps to the instruction starting at restart location.
What is the instruction PCHL mean?
PCHL. None. Load the program counter with HL contents. The contents of registers H & L are copied into the program counter. The contents of H are placed as the high-order byte and the contents of L as the loworder byte.
What is instruction set of 8085 microprocessor?
8085 has 246 instructions. Each instruction is represented by an 8-bit binary value. These 8-bits of binary value is called Op-Code or Instruction Byte.
What is HL pair?
(D) H-L pair is an exceptional pair which is used as a memory pointer to locate an address L X H 2000H. H recognize H-L pair of general purpose register. Load 16 bit data immediately in H-L pair it means 2000H is the location of memory where data is stored and it is recall by an instruction MOV A M.
What is microprocessor LDAX?
In 8085 Instruction set, LDAX is a mnemonic that stands for LoaD Accumulator from memory pointed by eXtended register pair denoted as “rp” in the instruction. This instruction uses register indirect addressing for specifying the data. It occupies only 1-Byte in the memory.
What is LHLD in microprocessor?
Microprocessor8085. In 8085 Instruction set LHLD is a mnemonic that stands for Load HL pair using Direct addressing from memory location whose 16-bit address is denoted as a16. So the previous content of HL register pair will get updated with the new 16-bits value.
What is XRA microprocessor?
Microprocessor8085. In 8085 Instruction, XRA is a mnemonic that stands for “eXclusive OR Accumulator” and “R” stands for any of the following registers, or memory location M pointed by HL pair. R = A, B, C, D, E, H, L, or M. This instruction is used to Ex-OR contents of R with the Accumulator.
What is an 8085 microprocessor?
The Intel 8085 (“eighty-eighty-five”) is an 8-bit microprocessor produced by Intel and introduced in March 1976. It is a software-binary compatible with the more-famous Intel 8080 with only two minor instructions added to support its added interrupt and serial input/output features.
What is microprocessor instruction?
An instruction is a binary pattern designed inside a microprocessor to perform a specific function. The entire group of instructions that a microprocessor supports is called Instruction Set.
How do you convert SP to HL?
Algorithm –
- Initialize stack pointer (SP) by 3FFF.
- Push the content of H and L register into the stack.
- Push the content of D and E register into the stack.
- Pop the upper two bytes from top of stack and place it in HL register.
- Pop the remaining two bytes from top of stack and place it in DE register.