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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. Instruction. Set by Opcode . Appendix A: Instruction Set by Opcode. Exchange HL .. GET PETHERICK CODE FROM TABLE. ; STORE IT IN. instruction codes. The size of the instruction can either be one-byte, two- bytes or three bytes. Opcodes Table of Microprocessor.

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For example, multiplication is implemented using a multiplication algorithm.

All 2-operand 8-bit arithmetic and logical ALU operations work on the 8-bit accumulator the A register. Sign in to our Contributor site. Already have an account? Save to Collection Create your free account to use Collections Save and organize all the images you need for your projects with Collections.

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 Since use of these instructions usually relates to specific hardware features, the necessary program modification would typically be nontrivial.

8085 Arithmetic Instructions

Lastly, the carry flag is set if a carry-over from bit 7 of the accumulator the MSB occurred. A NOP “no operation” instruction exists, but does not modify any of the registers or flags. Create a Free Account. Something went wrong, please try again. One sophisticated instruction is XTHL, which is used for exchanging the register pair HL with the value sheey at the address indicated by the stack pointer.

You can redownload your image for free xheet any time, in any size. Editorial content, such as news and celebrity images, are not cleared for commercial use. A downside compared to similar contemporary designs such as the Z80 is the fact that the buses require demultiplexing; however, address latches in the Intel, and memory chips allow a direct interface, so an along with these chips is shfet a complete system.


The three timers in. State signals are provided by dedicated bus control signal pins and two dedicated bus state ID pins named S0 and S1. Please refer to device data sheet for actual part marking.

The contents of the accumulator are changed from a binary value to two 4-bit BCD digits.

In many engineering schools [7] [8] the processor is used in introductory microprocessor courses. The contents of the designated register or memory are decremented by 1 and their result is stored at the same place. MSAN difference between intel and motorola difference between intel and zilog z80 interfacing with interfacing of devices with difference between and zilog z80 intel microprocessor memory interfacing with motorola intel motorola architecture.

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Intel 8085

Adding HL to itself performs a bit arithmetical left shift with one instruction. 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. This page was last edited on 16 Novemberat All interrupts are enabled by the EI instruction and disabled by the DI instruction.

Discontinued BCD oriented 4-bit Trainer kits composed of a printed circuit board,and supporting opdodes are opcores by various companies. The has extensions to support 0885 interrupts, with three maskable vectored interrupts RST 7.

Pin 39 is used as the Hold pin. Like larger processors, it has CALL and RET 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.


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. We have images for every project, all covered by worry free licensing Download with confidence Find your plan.

As in thethe contents of the memory address pointed to by HL can be accessed as pseudo register M. As in many other 8-bit processors, all instructions are encoded in a single byte including register-numbers, but excluding immediate datafor simplicity. Ready To Do More?

Many of these support chips were also used with other processors. Also, the architecture and instruction set of the are easy for a student to understand. Although the is an 8-bit processor, it has some bit operations. Previous 1 2 Intel An Intel AH processor.

Later and support was added including ICE in-circuit emulators. Opocdes data, control, and address signals are available on dual pin headers, and a large prototyping area is provided. Saved one filter Removed from saved filters.

Microprocessor Opcode Sheet Stock Illustration – Shutterstock

Sign In We’re Sorry! No file text available. It is the original image provided by the contributor. It has a bubble memory option and various programming modules, including EPROM, and Intel and programming modules which are plugged into the side, replacing stand-alone device programmers. Later an external box was made available with two more floppy opcoeds. The is a binary compatible follow up on the The zero flag is set if the result of the operation was 0.