Ral 8085 In C
An Instruction is a command given to the computer to perform a specified operation on given data. The instruction set of a microprocessor is the collection of the instructions that the microprocessor is designed to execute. The instructions described here are of Intel 8085. These instructions are of Intel Corporation. They cannot be used by other microprocessor manufactures. The programmer can write a program in assembly language using these instructions. These instructions have been classified into the following groups:.
Data Transfer Group. Arithmetic Group.
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This page covers 8085 instruction set. The 8085 instructions are specified with opcode, operand, instruction size, M-cycle, T-cycle etc. Table-1: List of All 8085 Instructions with their Opcodes, operands, instruction Size, Number of Machine Cycles, Number of T-states. OPCODES TABLE OF INTEL 8085 Opcodes of Intel 8085 in Alphabetical Order Sr. Mnemonics, Operand Opcode Bytes 1. ACI Data CE 2 2. ADC A 8F 1 3. ADC B 88 1 4. ADC C 89 1 5. ADC D 8A 1 6. ADC E 8B 1 7. ADC H 8C 1 8. ADC L 8D 1 9. ADC M 8E 1 10. ADD A 87 1 11. ADD B 80 1 12. ADD C 81 1 13. ADD D 82 1 14.
Logical Group. Branch Control Group.
I/O and Machine Control GroupData Transfer GroupInstructions, which are used to transfer data from one register to another register, from memory to register or register to memory, come under this group. Examples are: MOV, MVI, LXI, LDA, STA etc. When an instruction of data transfer group is executed, data is transferred from the source to the destination without altering the contents of the source. For example, when MOV A, B is executed the content of the register B is copied into the register A, and the content of register B remains unaltered. Similarly, when LDA 2500 is executed the content of the memory location 2500 is loaded into the accumulator. But the content of the memory location 2500 remains unaltered.
Arithmetic GroupThe instructions of this group perform arithmetic operations such as addition, subtraction; increment or decrement of the content of a register or memory. Examples are: ADD, SUB, INR, DAD etc. Logical GroupThe Instructions under this group perform logical operation such as AND, OR, compare, rotate etc. Examples are: ANA, XRA, ORA, CMP, and RAL etc.
Branch Control GroupThis group includes the instructions for conditional and unconditional jump, subroutine call and return, and restart. Examples are: JMP, JC, JZ, CALL, CZ, RST etc. I/O and Machine Control GroupThis group includes the instructions for input/output ports, stack and machine control. Examples are: IN, OUT, PUSH, POP, and HLT etc. Intel 8085 Instructions. Data Transfer Group.
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MOV r1, r2 (Move Data; Move the content of the one register to another). r1 D-E. Arithmetic Group. ADD r. (Add register to accumulator) A.
8080A complete emulation of the Intel 8080 processor written in C99. Goals:.
accuracy: it passes all test roms at my disposal. readability. portability: tested on debian 8 with gcc 5 and macOS 10.12+ with clangRunning testsYou can run the tests by running make &&./i8080tests.