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Opcode Meaning Notes BOUND: 62 /r: Check array index against bounds: raises software interrupt 5 if test fails ENTER: C8 iw ib: Enter stack frame: Modifies stack for entry to procedure for high level language. Takes two operands: the amount of storage to be allocated on the stack and the nesting level of the procedure. INSB/INSW: 6C Input from ...
Ralf Brown's Interrupt List (aka RBIL, x86 Interrupt List, MS-DOS Interrupt List or INTER) is a comprehensive list of interrupts, calls, hooks, interfaces, data structures, CMOS settings, memory and port addresses, as well as processor opcodes for x86 machines from the 1981 IBM PC up to 2000 (including many clones), [1] [2] [nb 1] most of it still applying to IBM PC compatibles today.
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.
GNUSim8085 is a graphical simulator, assembler and debugger for the Intel 8085 microprocessor in Linux and Windows. It is among the 20 winners of the FOSS India Awards announced in February 2008. [1] GNUSim8085 was originally written by Sridhar Ratnakumar in fall 2003 when he realized that no proper simulators existed for Linux.
The "Software Guard" is an 8-bit Substitution cipher that, during instruction fetch/decode, translates opcode bytes using a 256-entry lookup table stored in an on-chip Mask ROM. V25, V35 "Software Guard" [38] BRKN imm8: 63 ib: Break and Enable Native Mode. Similar to BRKS, excepts disables "Software Guard" rather than enabling it. MOV r/m,DS3 ...
Generally, a mnemonic is a symbolic name for a single executable machine language instruction (an opcode), and there is at least one opcode mnemonic defined for each machine language instruction. Each instruction typically consists of an operation or opcode plus zero or more operands. Most instructions refer to a single value or a pair of values.
Opcode Instruction Description Type of instruction 0x58 add: Add two values, returning a new value. Base instruction 0xD6 add.ovf: Add signed integer values with overflow check. Base instruction 0xD7 add.ovf.un: Add unsigned integer values with overflow check. Base instruction 0x5F and: Bitwise AND of two integral values, returns an integral value.
A large amount of software, including a large list of x86 operating systems are using x86-based hardware. Modern x86 is relatively uncommon in embedded systems, however; small low power applications (using tiny batteries), and low-cost microprocessor markets, such as home appliances and toys, lack significant x86 presence.