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The Intel 8085 ("eighty-eighty-five") is an 8-bit microprocessor produced by Intel and introduced in March 1976. [2] It is the last 8-bit microprocessor developed by Intel. It is software-binary compatible with the more-famous Intel 8080 with only two minor instructions added to support its added interrupt and serial input/output features.
Below is the full 8086/8088 instruction set of Intel (81 instructions total). [2] These instructions are also available in 32-bit mode, in which they operate on 32-bit registers (eax, ebx, etc.) and values instead of their 16-bit (ax, bx, etc.) counterparts.
Intel 8080, Intel 8085, Z80: NOP: 1 0x00 DEC Alpha: NOP: 4 0x47FF041F Opcode for BIS r31,r31,r31, an instruction that bitwise-ORs the always-0 register with itself. AMD 29k: NOP: 4 0x70400101 Opcode for aseq 0x40,gr1,gr1, an instruction that asserts that the stack register is equal to itself. [3] ARM A32: NOP: 4 0x00000000 This stands for andeq ...
At Intel, the 8080 was followed by the compatible and electrically more elegant 8085. Later, Intel issued the assembly-language compatible (but not binary-compatible) 16-bit 8086 and then the 8/16-bit 8088, which was selected by IBM for its new PC to be launched in 1981.
A small number of additional instructions. The 80188 was a version with an 8-bit bus. 286 first x86 processor with protected mode including segmentation based virtual memory management. Performance improved by a factor of 3 to 4 over 8086. Included instructions relating to protected mode. The 80286 had a 24-bit address bus.
The instruction set architecture (ISA) that the computer final version (SAP-3) is designed to implement is patterned after and upward compatible with the ISA of the Intel 8080/8085 microprocessor family. Therefore, the instructions implemented in the three SAP computer variations are, in each case, a subset of the 8080/8085 instructions. [2]
Intel SDK-85 Kit Assembled Intel SDK-85. The SDK-85 MCS-85 System Design Kit was a single board microcomputer system kit using the Intel 8085 processor, clocked at 3 MHz with a 1.3 μs instruction cycle time. It contained all components required to complete construction of the kit, including LED display, keyboard, resistors, caps, crystal, and ...
The MOV r,r instruction requires 4 clock cycles (Intel 8080: 5 clock cycles). SPHL and XTHL also executes one cycle faster than Intel 8080 but DAD executes one cycle slower. 3-byte instructions are allowed in an interrupt acknowledge cycle, so a CALL instruction to any memory address can be used (Intel 8080: only 1-byte RST instructions are ...