Each instruction has a one-byte (8-bit) operation codes or opcode. With 8- bit binary opcode, a total of different operation codes can. 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.

Author: Goltijora Dobar
Country: Costa Rica
Language: English (Spanish)
Genre: Photos
Published (Last): 16 March 2011
Pages: 297
PDF File Size: 18.7 Mb
ePub File Size: 2.19 Mb
ISBN: 882-2-81185-521-3
Downloads: 20749
Price: Free* [*Free Regsitration Required]
Uploader: Zololkis

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 can also be clocked by an external oscillator making it feasible to use the in synchronous multi-processor systems using a system-wide common clock for all CPUs, or to synchronize the CPU to an external time reference such as that from a video source or a high-precision time reference.

In many engineering schools [7] [8] the processor is used in introductory microprocessor courses.

This is a 3-byte instruction, the second byte specifies the low-order address and the third byte specifies the high-order address. It can also accept a second processor, allowing a limited form of multi-processor operation where both processors run simultaneously and independently. 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.

Opcodes of Microprocessor | Electricalvoice

Just wanted to tell you keep up the ggood work! From Wikipedia, the free encyclopedia. Like larger processors, it has CALL and 808 instructions for multi-level procedure calls and returns which can be conditionally executed, like jumps and instructions to save and restore any bit register-pair on the machine stack.


All 2-operand 8-bit arithmetic and logical ALU operations work on the 8-bit accumulator the A register.

Load the register pair immediate. Your means of explaining everything in this article is truhly fastidious, every one be abl to easily be aware of it, Thanks a lot.

Very useful advice within this post! The Intel ” eighty-eighty-five ” is an 8-bit microprocessor produced ipcodes Intel and introduced in I have book marked it for later!

Intel 8085

Intel produced a series of development systems for the andknown as the MDS Microprocessor System. The contents of a memory location, specified by a bit address in the operand, are copied to the accumulator.

Lucky me I ran across your site by chance stumbleupon. For example, multiplication is implemented using a multiplication algorithm. More complex operations and other arithmetic operations must be implemented in software.

Adding HL to itself performs a bit arithmetical left shift with one instruction. Sorensen in the process of developing an assembler. Push the register pair onto the stack.

Notify me of follow-up comments by email.

Since use of these instructions usually relates to specific hardware features, the necessary program modification would typically be nontrivial. The contents of the H register provide the high-order address and the contents of the L register provide the low-order address.

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 stack pointer register is decremented again and the contents of the low-order register C, E, L, flags are copied to that location.


My blg site is in the very same niche as yours and my visitors would certainly benefit frtom some of the information you present here.

Opcodes of Intel 8085 Microprocessor in Alphabetical Order

The account helped me a acceptable deal. Exceptions include timing-critical code and code that is sensitive to the aforementioned difference in the 88085 flag setting or differences in undocumented CPU behavior. These kits usually include complete documentation allowing a student to go from soldering to assembly language programming in a single course. There are also eight one-byte call instructions RST for subroutines located at ppcodes fixed addresses 00h, 08h, 10h, Unlike the it does not multiplex state signals onto the data bus, but the 8-bit data bus is instead multiplexed with the lower 8-bits of the bit address bus to limit the number of pins to Load the accumulator indirect.

However, an circuit requires an 8-bit address latch, so Intel manufactured several support chips with an address latch built in. The contents of register L are stored in the memory location specified by the bit address in the operand and the contents of H register are stored into the next memory location by incrementing the opcodez.