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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. opcodes-table-of-intelpdf – Download as PDF File .pdf), Text File .txt) or read online.

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The has extensions to support opccode interrupts, with three maskable vectored interrupts RST 7. Retrieved from ” https: The other six registers can be used as independent byte-registers or as three bit register pairs, BC, DE, and HL or B, D, H, as referred to in Intel documentsdepending on the particular instruction.

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. It can also accept a second processor, allowing a limited form of opode operation where both processors run simultaneously and independently.

The parity flag is set according to the parity odd or even of the accumulator.

Intel 8085

Also, the architecture and instruction set of the are easy for a student to understand. Retrieved 31 May Intel An Intel Sheef processor.

In other projects Wikimedia Commons. Although the is an 8-bit processor, it has some bit operations.

The Intel ” eighty-eighty-five ” is an 8-bit microprocessor produced by Intel and introduced in All interrupts are enabled by the EI instruction and disabled by the DI instruction. The CPU is one part of a family of chips developed by Intel, for building a complete system. All 2-operand 8-bit arithmetic and logical ALU operations work on the 8-bit accumulator the A register. These kits usually include complete documentation allowing a student to go from soldering to assembly language programming in a single course.

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. 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 almost a complete system. 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.


For example, multiplication is implemented using a multiplication algorithm. 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. This unit uses the Multibus card cage which was intended just for the development system. This was typically longer than the product life of desktop computers. An Intel AH processor. A NOP “no operation” instruction exists, but does not modify any of the registers or flags.

State signals are provided by dedicated bus control signal pins and two dedicated bus state ID pins named S0 and S1. 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, as for two-operand 8-bit operations.

Subtraction and bitwise logical operations on 16 bits is done in 8-bit steps. Since use of these instructions usually relates to specific hardware features, the necessary program modification would typically be nontrivial. Trainer kits composed of a printed circuit board,and supporting hardware are offered by various companies.

The is a conventional von Neumann design based on the Intel From Wikipedia, the free encyclopedia.

Intel – Wikipedia

Sorensen, Villy January 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. Due to the regular encoding of the MOV instruction using nearly 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.


Some of them are followed by one or two bytes of data, which can be an immediate operand, a memory address, or a port number. Intel sbeet a series of development systems for the andknown as the MDS Microprocessor System. The is supplied in a pin DIP package. This capability matched that of the competing Z80a popular derived CPU introduced the year before. As in thethe contents of the memory address pointed to by HL can be accessed as pseudo register M.

Each of these five interrupts has a separate pin on the processor, a feature which permits simple systems to avoid the cost of a separate interrupt controller.

Many of these support chips were also used with other processors. In many engineering schools [7] [8] the processor is used in 8058 microprocessor courses. More complex operations and other arithmetic operations must be implemented in software. The sign flag is set if the result has a negative sign i.

Opcodes of 8085 Microprocessor

The screen and keyboard can be switched between them, allowing programs to be assembled on one processor large programs took awhile while files are edited in the other.

An improvement over the is that the can itself drive a piezoelectric crystal directly connected to it, and a built-in clock generator shert the internal high amplitude two-phase clock signals at half the crystal frequency a 6.

The zero flag is set if the result of the operation was 0. The auxiliary or half carry flag is set if a carry-over from bit 3 to bit 4 occurred. Unlike the it does not multiplex state signals onto the shset bus, opfode 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 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.