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Intel instruction set. x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, xA, xB, xC, xD, xE, xF. 0x, NOP 1 4 , LXI B,d16 3 10 , STAX B 1 7 , INX B 1 6 –K Opcode sheet for Microprocessor with descriptionMnemonic ACI n ADC r ADC M ADD r ADD M ADI n ANA r ANA M ANI n CALL a CC a CM a CMA CMC. tes. com. Gursharan Singh Tatla. Page 1 of 6. OPCODES TABLE OF INTEL Opcodes of Intel in Alphabetical Order. Sr. No. 1. 2. 3. 4. 5.

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Exceptions include timing-critical code and code that is sensitive to the aforementioned difference in the Oocode flag setting or differences in undocumented CPU behavior. By using this site, you agree to the Terms of Use and Privacy Policy.

A number of undocumented instructions and flags were discovered by two software engineers, Wolfgang Dehnhardt and Villy M.

Due to the regular encoding of the MOV instruction using opclde a quarter of the entire opcode space there are redundant codes to copy a register into itself MOV B,Bfor instancewhich are of little use, except for delays.

The is a conventional von Neumann design based on the Intel The is supplied in a pin DIP package.

Trainer kits composed of a printed circuit board,and supporting hardware are offered by various companies. The accumulator stores the results of arithmetic and logical operations, and the flags register bits sign, zero, auxiliary carry, parity, and carry flags are set or cleared according to the results of these operations.


The only 8-bit ALU operations that can have a destination other than the accumulator are the unary incrementation or decrementation instructions, which can operate on any 8-bit register or on memory addressed by HL, opcoe for two-operand 8-bit operations.

As in many other 8-bit processors, all instructions are encoded in a single byte including register-numbers, but excluding immediate datafor simplicity. These kits usually include complete documentation allowing a student to go from soldering to opcde language programming in a single course.

For two-operand 8-bit operations, the other operand can be either an immediate value, another 8-bit register, or a memory cell addressed by the bit register pair HL.

The is a binary compatible follow up on the Intel An Intel AH processor. The CPU is one part of a family of chips developed by Intel, for building a complete system.

It is a large and heavy desktop box, about a 20″ cube in the Intel corporate blue color which includes a CPU, monitor, and a single 8-inch floppy disk drive.

Intel 8085

For example, multiplication is implemented using a multiplication algorithm. Although the is an 8-bit processor, it has some bit operations.

Retrieved from ” https: The auxiliary or half carry flag is set if a carry-over from bit 3 to bit 4 occurred. Direct copying is supported between any two 8-bit registers and between any 8-bit register and a HL-addressed memory cell, using the MOV instruction.


It can also accept a second processor, allowing a limited form of multi-processor operation where both processors run simultaneously and independently. One sophisticated instruction is XTHL, which is used for exchanging the register pair HL with the value stored at the address indicated by the stack pointer.

The zero flag is 80855 if the result of the operation was 0. Some instructions use HL as a limited bit accumulator. There are also eight one-byte call instructions RST for opcoe located at the fixed addresses 00h, 08h, 10h, More complex operations and other arithmetic operations must be implemented in software. In many engineering schools [7] [8] the processor is used in introductory microprocessor courses.

This unit uses the Multibus card cage which was intended just for the development system. Later an external box was made available with two more floppy drives. Adding HL to itself performs a bit arithmetical left shift with one instruction.

Opcodes of Microprocessor | Electricalvoice

80885 Wikipedia, the free encyclopedia. The same is not true of the Z Also, the architecture and instruction set of the are easy for a student to understand. In other projects Wikimedia Commons.