What is microprocessor sphl?

In 8085 Instruction set, SPHL is an instruction with the help of which Stack Pointer will get initialized with the contents of register pair HL. It is an indirect way of initializing the stack pointer.

What is the function of Dad D instruction?

In 8085 Instruction set, DAD SP instruction is a special case of DAD rp instruction. In this instruction contents of HL and SP will get added and sum thus produced will get stored onto HL register pair. It occupies only 1-Byte in memory….Instruction type DAD SP in 8085 Microprocessor.

What is microprocessor LDAX?

Microprocessor8085. 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 JNC instruction?

The JNC instruction transfers program control to the specified address if the carry flag is 0. Otherwise, execution continues with the next instruction. No flags are affected by this instruction.

What is push and pop in microprocessor?

PUSH D: push the content of D and E register into the stack and decrements stack pointer by 2. POP H: pop the upper two bytes from top of stack and place it in HL register pair and increment SP by 2. POP D: pop the upper two bytes from top of stack and place it in DE register pair and increment SP by 2.

What is Adi in microprocessor?

Microprocessor8085. In 8085 Instruction set, ADI is a mnemonic, which stands for “ADd Immediate to Accumulator” and here “d8” stands for any 8-bit or 1-Byte of data. This instruction is used to add 8-bit immediate data to the Accumulator. The result of addition will be stored in the Accumulator.

What is LXI in COA?

These instructions are used to load the 16-bit address into the register pair. We can use this instruction to load data from memory location using the memory address, which is stored in the register pair rp. For an example, if the instruction is LXI H, FE50. It means that the FE50 is loaded into the HL register pair.

What is LHLD in microprocessor?

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 meaning of DCX H?

Microprocessor8085. In 8085 Instruction set, DCX is a mnemonic that stands for “DeCrementeXtended register” and rp stands for register pair. And it can be any one of the following register pairs − rp = BC, DE, or HL. This instruction will be used to subtract 1 from the present content of the rp.

What is difference between JC and JNC?

JC = Jump if carry set (C=1) JNC = Jump if carry is not set (C=0) JZ = Jump if zero-flag is set JNZ = Jump if zero-flag is not set JEQ = Jump if equal => another ‘name’ for JZ (There are many instruction aliases’).

What is push in microprocessor?

In 8085 Instruction set, PUSH rp instruction stores contents of register pair rp by pushing it into two locations above the top of the stack. rp stands for one of the following register pairs. rp = BC, DE, HL, or PSW.

What is pop microprocessor?

Microprocessor8085. In 8085 Instruction set, with the mnemonic POP, we can pop out 2-Bytes from the top of the stack through rp i.e. register pair e.g. BC, DE, HL or AF. Here AF is a register pair formed with Flag and Accumulator registers and also known as PSW (Processor Status Word).

What is XTHL in 8085 microprocessor?

In 8085 Instruction set, XTHL is a mnemonic that stands for “eXchange Top of stack with HL”. This instruction exchanges the contents of the top two locations of the stack with the contents of register pair HL. Here it is not an exchange between SP with HL.It occupies only 1-Byte in memory.

What is XTHL instruction in C++?

This instruction exchanges the contents of the top two locations of the stack with the contents of register pair HL. Here it is not an exchange between SP with HL.It occupies only 1-Byte in memory. The result of execution of this instruction XTHL is shown below with a sample instruction and along with tracing table.

What is the timing diagram against this instruction XTHL execution?

The timing diagram against this instruction XTHL execution is as follows − Summary − So this instruction XTHL requires 1-Byte, 5-Machine Cycles (Opcode Fetch, Memory Read, Memory Read, Memory Write, Memory Write) and 16 T-States for execution as shown in the timing diagram.

How many machine cycles are required for XTHL instruction?

Summary − So this instruction XTHL requires 1-Byte, 5-Machine Cycles (Opcode Fetch, Memory Read, Memory Read, Memory Write, Memory Write) and 16 T-States for execution as shown in the timing diagram.