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American music software company
Opcode Systems, Inc. was an American music software company founded in 1985 by Dave Oppenheim and based in and around Palo Alto, California, USA. Opcode
Opcode_Systems
Part of a machine instruction
In computing, an opcode (abbreviated from operation code) is an enumerated value that specifies the operation to be performed. Opcodes are employed in
Opcode
Instructions directly executable by a computer
possible through opcode-level programming to deliberately arrange the resulting code so that two code paths share a common fragment of opcode sequences. These
Machine_code
Undocumented CPU instruction that has an effect
In computer science, an illegal opcode, also called an unimplemented operation, unintended opcode or undocumented instruction, is an instruction to a
Illegal_opcode
Visual programming language
Max Software and Ben Austin moved to Opcode Systems, which became the publisher of record for Max. Although Opcode launched its commercial version named
Max_(software)
American DJ and record producer (born 1978)
at the University of California, Santa Cruz, producing tracks using Opcode Systems Studio Vision Pro. Ashton began DJing parties in the Bay Area and drew
Bassnectar
Connection standard for electronic musical instruments
editor/librarians that combine the two functions were once common, and included Opcode Systems' Galaxy, eMagic's SoundDiver, and MOTU's Unisyn. Although these older
MIDI
Low-level programming language family
language uses mnemonic symbols to represent low-level machine instructions (opcodes), directives, and usually architectural registers and flags. Some of the
Assembly_language
Aspect of computing history
contain a 10-bit literal, an operand call, a descriptor call or a 10-bit opcode. The B5000 was contemporaneous with the Ferranti Atlas "Computers | Timeline
History_of_operating_systems
Model that describes the programmable interface of a computer processor
instructions. On the processing architecture, a given instruction may specify: opcode (the instruction to be performed) e.g. add, copy, test any explicit operands:
Instruction_set_architecture
Combinational digital circuit
called operands, and a code indicating the operation to be performed (opcode); the ALU's output is the result of the performed operation. In many designs
Arithmetic_logic_unit
System to identify resources on a network
follows: QR: 1 bit Indicates if the message is a query (0) or a reply (1). OPCODE: 4 bits The type can be QUERY (standard query, 0), IQUERY (inverse query
Domain_Name_System
Range of mainframe computers in the 1960s and 70s
address in a 32-bit addressing space. Further, only the VALC opcode loaded data: opcodes for ADD, MULT and so forth did no addressing, working entirely
Burroughs_Large_Systems
Protocol
assigned by the program that generates any kind of query. QR - Query/Response. OPCODE - A 4-bit field that specifies the kind of query in this message. This value
Link-Local Multicast Name Resolution
Link-Local_Multicast_Name_Resolution
List of x86 microprocessor instructions
(6 bits for opcode C1 if it is encoded with a 64-bit operand-size under x86-64) On 80186 and later, sub-opcode /6 for the shift-opcodes C0/C1/D0/D1/D2/D3
List_of_x86_instructions
Computer security testing tool
against a remote target machine. Other important sub-projects include the Opcode Database, shellcode archive and related research. The Metasploit Project
Metasploit
Interpreted programming language
the semantics of a few of the opcodes, and SCHIP continued to use those new semantics in addition to changing other opcodes. Many online resources about
CHIP-8
American software development company
archive of the website). C74 began producing the MSP extension to Opcode Systems's 1990 program "Max" in the mid 1990s, and in 1998 started distributing
Cycling_'74
Computer assembly language instruction
SIGTRAP. The opcode for INT3 is 0xCC, as opposed to the opcode for INT immediate8, which is 0xCD immediate8. Since the dedicated 0xCC opcode has some desired
INT_(x86_instruction)
8-bit microprocessor from 1975
instruction operation codes (opcodes) are 8 bits long and have the general form AAABBBCC, where AAA and CC define the opcode, and BBB defines the addressing
MOS_Technology_6502
Processor executing one instruction in minimal clock cycles
to encode the two remaining registers and the opcode. Common instructions found in multi-word systems, like INC and DEC, which reduce the number of words
Reduced instruction set computer
Reduced_instruction_set_computer
Electronic test instrument that measures multiple signals from a circuit
digital system or digital circuit. A logic analyzer may convert the capture into timing diagrams, protocol decodes, state machine traces, opcodes, or may
Logic_analyzer
commercial version of Max (without the FTS server) was licensed by IRCAM to Opcode Systems (and, later, Cycling '74). Max/FTS eventually migrated to a software-only
ISPW
Family of backward-compatible assembly languages
human-readable compared to raw machine code. Each machine code instruction is an opcode which, in assembly, is replaced with a mnemonic. Each mnemonic corresponds
X86_assembly_language
Core of a computer operating system
on the IBM System/360. E.g., Unimplemented User Operation (UUO) on the DEC PDP-10. Some architectures have an opcode or block of opcodes dedicated to
Kernel_(operating_system)
Programmable machine that processes data
code or opcode for short). The command to add two numbers together would have one opcode; the command to multiply them would have a different opcode, and
Computer
64-bit RISC instruction set architecture
Several third-party vendors also produced Alpha systems, including PC form factor motherboards. Operating systems that support Alpha included OpenVMS (formerly
DEC_Alpha
Video editing tool
on MIDI control of video in real-time. It was created with MAX from Opcode Systems, and utilized the newly released QuickTime 1.0 movie object. The first
Vujak
Computer machine code instruction
design flaw was discovered by programmers. Due to incomplete opcode decoding, two illegal opcodes, 0x9D and 0xDD, will cause the program counter on the processor
Halt and Catch Fire (computing)
Halt_and_Catch_Fire_(computing)
Single chip microcontroller series by Intel
initial opcode byte, followed by up to 2 bytes of operands. 1⁄4 of the opcode bytes, x0–x3, are used for irregular opcodes. 3⁄4 of the opcode bytes, x4–xF
Intel_MCS-51
Macintosh multimedia software
Open Music System (OMS) was a virtual studio management application by Opcode for the Classic Mac OS. Similar to FreeMIDI by Mark of the Unicorn and Audio
Open_Music_System
Set of x86 processor instructions
The Intel BCD opcodes are a set of six x86 instructions that operate with binary-coded decimal numbers: AAA, DAA, AAS, DAS, AAM, and AAD. Most arithmetic
Intel_BCD_opcodes
Musical artist
Receptor (2004–2015), Kurzweil for K2000, K2500 & K2600 (1990–2008), and Opcode Systems for Studio 5 & Galaxy Editors software (1990–1999). In 1996 he released
David_Rosenthal_(musician)
Mainframe computer, 1960s
the IBM 709: A three-bit opcode (prefix), 15-bit decrement (D), three-bit tag (T), and 15-bit address (Y) A twelve-bit opcode, two-bit flag (F), four unused
IBM_7090
has a single opcode. In others, some instructions have an opcode and one or more modifiers. E.g., on the IBM System/370, byte 0 is the opcode but when byte
Comparison of instruction set architectures
Comparison_of_instruction_set_architectures
8-bit microprocessor
registers. The binary opcodes (machine language) were identical, but preceded by a new opcode prefix. Zilog published the opcodes and related mnemonics
Zilog_Z80
Instruction set architecture
(immediate), and J (jump). Every instruction starts with a 6-bit opcode. In addition to the opcode, R-type instructions specify three registers, a shift amount
MIPS_architecture
Topics referred to by the same term
Prague David Oppenheim (actor) (2012–now) Dave Oppenheim, founder of Opcode Systems This disambiguation page lists articles about people with the same name
David_Oppenheim
Computer file system architecture design
file system is a file system used on MS-DOS and Windows 9x family of operating systems. It continues to be used on mobile devices and embedded systems, and
Design_of_the_FAT_file_system
Instruction for x86 microprocessors
In the x86 architecture, the CPUID instruction (identified by a CPUID opcode) is a processor supplementary instruction (its name derived from "CPU Identification")
CPUID
36-bit computer by Digital (1966–1983)
general instructions, the leftmost 9 bits, 0 to 8, contain an instruction opcode. Many of the possible 512 codes are not defined in the base model machines
PDP-10
Network administration command-line tool
example.com any ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4016 ;; flags: qr rd ra; QUERY: 1, ANSWER:
Dig_(command)
1960s decimal computer
201–332. The 1401's instruction format is Opcode with [A-or-I-or-unit-address [B-address]] [modifier] word mark Opcodes are one character. Memory addresses
IBM_1401
List of computer processor instructions
the memory operand, and 9-bit branch destinations. Later revisions added opcode bits, allowing additional address bits. They are accumulator machines, with
PIC_instruction_listings
Experimental operating system from Microsoft Research
Intermediate Language (CIL) opcodes are compiled into x86 opcodes using the Bartok compiler. Singularity is a microkernel operating system. Unlike most historic
Singularity (operating system)
Singularity_(operating_system)
Basic instruction cycle in a computer
operations based on specific opcodes in the instruction. For example, in RISC-V architecture, funct3 and funct7 opcodes exist to distinguish whether an
Instruction_cycle
Machine instruction that indicates to a computer to do nothing
effects; for example, on the Motorola 68000 series of processors, the NOP opcode causes a synchronization of the pipeline. Listed below are the NOP instruction
NOP_(code)
Anomaly in computer security and programming
example, maintains a database of suitable opcodes, though it lists only those found in the Windows operating system. A buffer overflow occurring in the heap
Buffer_overflow
Process of starting a computer
and LOADER support the 7.07 sectors had to resort to self-modifying code, opcode-level programming in machine language, controlled utilization of (documented)
Booting
CPU optimization unit
Fetching the instruction opcodes from program memory well in advance is known as prefetching and it is served by using a prefetch input queue (PIQ). The
Prefetch_input_queue
Source code that alters its instructions to the hardware while executing
switch { replace the opcode "increase" above with the opcode to decrease, or vice versa } } Note that two-state replacement of the opcode can be easily written
Self-modifying_code
instructions in the instruction set of the Common Intermediate Language bytecode. Opcode abbreviated from operation code is the portion of a machine language instruction
List_of_CIL_instructions
Unexpected program exit due to an error
bug, executing invalid machine instructions (an illegal or unauthorized opcode), or triggering an unhandled exception. The original software bug that started
Crash_(computing)
Piece of software or hardware that creates and runs virtual machines
presents the guest operating systems with a virtual operating platform and manages the execution of the guest operating systems. Unlike an emulator, the guest
Hypervisor
Firmware for hardware initialization and OS runtime services
data structures, memory and port addresses, and processor opcodes for the x86 architecture System Management BIOS (SMBIOS) UEFI (Unified Extensible Firmware
BIOS
8-bit microprocessor
slice designed by Four-Phase Systems and unveiled in February 1970. The chip was first used as part of Four-Phase's System IV/70 24-bit minicomputer to
Four-Phase_Systems_AL1
Feature of HDMI
is acknowledged, the device tries another address. The second byte is an opcode which specifies the operation to be performed, and the number and meaning
Consumer_Electronics_Control
Music notation software
It was originally published by Opcode Systems, which produced MIDI sequencing and digital audio software. After Opcode ceased product development in 1999
Overture_(software)
64-bit x86 register
In x86-64 mode, RDTSC also clears the upper 32 bits of RAX and RDX. Its opcode is 0F 31. Pentium competitors such as the Cyrix 6x86 did not always have
Time_Stamp_Counter
Series of 16-bit computers by Texas Instruments
of program SVC DATA >0000 R3 - Open I/O opcode DATA >0B00 R4 - Write I/O opcode DATA >0100 R5 - Close I/O opcode DATA STRING R6 - Message address DATA STRLEN
TI-990
performed by these opcodes is the same for Intel and AMD. This documentation difference applies only to the MMX/SSE forms of these opcodes — for VEX/EVEX-encoded
List_of_x86_SIMD_instructions
IBM mainframe operating system designed for use with smaller machines
issues command to a magnetic tape unit. The format is // MTC <opcode>,SYSxxx[,<nn>]. <opcode> is a function such as "FSF" to forward space one file or "REW"
DOS/360_and_successors
Model independent architecture for the S/360 line of mainframe computers
Instructions in the S/360 are two, four or six bytes in length, with the opcode in byte 0. Instructions have one of the following formats: RR (two bytes)
IBM_System/360_architecture
Fatal system error screen
03: Shutdown Error 04: Overflow Trap 05: Bounds Check Fault 06: Invalid Opcode Fault 07: "Coprocessor Not Available" Fault 08: Double Fault 09: Coprocessor
Blue_screen_of_death
Trademark for network-based product
the interpretation of the opcode byte, with "0" meaning that the opcode is a light level (ARC), and "1" meaning that the opcode is a command. Multi packet
Digital Addressable Lighting Interface
Digital_Addressable_Lighting_Interface
System routines for Classic Mac OS
implementation of the Macintosh operating system executes system calls using that processor's illegal opcode exception handling mechanism. Motorola specified
Macintosh_Toolbox
Toolkit for building GUI and command-line based operating systems
ahead-of-time compiler named IL2CPU, designed to parse CIL and output x86 opcodes. (IL To CPU) is an AOT compiler that is written using a Common Intermediate
Cosmos_(operating_system)
Executable file format
compiler can generate optimized code with a simple indirect call opcode. Modern operating systems use address space layout randomization (ASLR), a process that
Portable_Executable
8-bit microcontroller family
byte. Most STM8 opcode bytes consist of 1 bit of type (one- or two-operand), three bits of addressing mode, and four bits of opcode. Only 6 addressing
STM8
Computer security exploit technique
"certain machine instructions which happen to contain the return opcode in their opcodes or immediate operands", such as movl $0xC3, %eax. The ARMv8.3-A
Return-oriented_programming
Operating system of the Atari ST range of computers
boot sectors for the Atari platform typically start with an MC68K jump opcode (e.g. 0x603C, and the last two byte word must sum with the rest of the boot
Atari_TOS
Mainframe computers manufactured in 1966 to 1991
were also known as Burroughs Medium Systems, by contrast with the Burroughs Large Systems and Burroughs Small Systems. The B2500 and B3500 computers were
Burroughs_Medium_Systems
Family of RISC-based computer architectures
state. In Thumb, the 16-bit opcodes have less functionality. For example, only branches can be conditional, and many opcodes are restricted to accessing
ARM_architecture_family
Signetics microprocessor
uses octal. The three most significant bits of the instruction define the opcode, and divide the instructions into eight classes: The MOVE instruction allows
Signetics_8X300
Instruction encoding rule for the x86 instruction set
set. Opcodes in x86 are generally one-byte, though two-byte instructions and prefixes exist. ModR/M is a byte that, if required, follows the opcode and
ModR/M
8-bit microprocessor
(1997-09-09). "Z180 Opcode Map". Archived from the original on 2008-11-22. Retrieved 2009-07-15. Harston, J.G. (1998-04-15). "Full HD64180/Z180 Opcode List". Archived
Zilog_Z180
Fault initiated by x86 processors due to an access violation
13 (0Dh)). Some operating systems may also classify some exceptions not related to access violations, such as illegal opcode exceptions, as general protection
General_protection_fault
Educational computer assembly language
16 bits wide and have 4-bit opcodes. The instruction set defines instructions for fifteen of the sixteen possible opcodes, though some instructions have
Little_Computer_3
Type of computer instructions
sign-extension and points out the potential is much greater. Intel BCD opcodes Power ISA has a large range of bit manipulation instructions, largely due
Bit_manipulation_instructions
of JMP (opcodes E9 and FF /4), CALL (opcodes E8 and FF /2), RET (opcodes C2 and C3), and the short/near forms of the Jcc instructions (opcodes 70..7F and
List of discontinued x86 instructions
List_of_discontinued_x86_instructions
Software responsible for starting the computer
and LOADER support the 7.07 sectors had to resort to self-modifying code, opcode-level programming, controlled utilization of side effects, multi-level data/code
Bootloader
Control system developed in Sydney
of: [1C] [Area] [Data 1] [OpCode] [Data 2] [Data 3] [Join] [Checksum] Area is the Logical Area the message is to control. OpCode defines the Action to be
Dynalite
1970 mainframe computer
instruction format is an extension of that of the GE-600 series, with the opcode field extended to 10 bits by adding bit 27 as the low-order bit; that bit
Honeywell_6000_series
segment to which the entry refers. Instructions that access memory have an opcode, a field specifying a data register operand, a field specifying a data register
Plessey_System_250
Mainframe computer systems made by IBM through the 1950s and early 1960s
address. Sign (1 bit) – Whole-word (-) or Half-word (+) operand address Opcode (5 bits) – 32 instructions Address (12 bits) – 4096 Half-word addresses
IBM_700/7000_series
Computer instruction which pauses execution
NT, for example, this instruction is run in the "System Idle Process". On x86 processors, the opcode of HLT is 0xF4. On ARM processors, the similar instructions
HLT_(x86_instruction)
Comprehensive list of features of x86-based computers
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)
Ralf_Brown's_Interrupt_List
Central computer component that executes instructions
combination of bits, known as the machine language opcode. While processing an instruction, the CPU decodes the opcode (via a binary decoder) into control signals
Central_processing_unit
Assembly languages for IBM System/360 and successor mainframes
Operation (PDF). IBM Systems Reference Library. IBM Corporation. A22-6821-0. Retrieved Dec 6, 2018. "HLASM - List of all Opcodes, Extended Mnemonics and
IBM Basic assembly language and successors
IBM_Basic_assembly_language_and_successors
Instruction in computer program
"Control instructions" (PDF). IBM 7094 Principles of operation (PDF). Systems reference library. p. 53. A22-6703-4. Retrieved September 22, 2025. Knuth
Branch_(computer_science)
Compact format of microprocessor instructions
8-bit opcodes which could be followed by zero to five additional bytes depending on the addressing mode. It was during the move to 32-bit systems, and
Compressed_instruction_set
Data transfer protocol designed for mobile devices
MacDroid SyncMate Expert Commander One Newer versions of several operating systems, including AmigaOS, Android, AROS, MorphOS, Symbian OS, and HarmonyOS/OpenHarmony/Oniro
Media_Transfer_Protocol
Assembly language and bytecode for web browsers
concatenation of the SIMD prefix, plus an opcode that is valid after the SIMD prefix, forms each SIMD opcode. The SIMD opcodes bring an additional 236 instructions
WebAssembly
CLASS { &opcode INTEGER UNIQUE, &InvocationParsType, &ResponseParsAndResultType, &ExceptionList ERROR OPTIONAL } WITH SYNTAX { OPCODE &opcode REQUEST ARGUMENTS
Information Object Class (ASN.1)
Information_Object_Class_(ASN.1)
Combined executable file for multiple processor types or operating systems
Applications. The Z-System Corner (58). Lincoln, CA, USA: 7–10. ISSN 0748-9331. ark:/13960/t70v9g87h. Retrieved 2020-02-09. […] there was an opcode of "RST 0"
Fat_binary
32-bit RISC-like computing architecture
immediate operands. The basic instruction "parcel" is 16 bits: 8 bits of opcode, 4 bits of source register, and 4 bits of destination register. Immediate-operand
Clipper_architecture
Design flaw in 1993-1997 Intel processors
compare and exchange of 8 bytes in register EAX). The bug also applies to opcodes ending in C9 through CF, which specify register operands other than EAX
Pentium_F00F_bug
8/16-bit microprocessor
compatibility with the NMOS 6502 and CMOS 65C02, excepting undocumented opcodes. All 256 opcodes in the 65C816 are functional in both operating modes. 24-bit memory
WDC_65C816
8-bit microprocessor
the regular encoding of the MOV instruction (using a quarter of available opcode space), there are redundant codes to copy a register into itself (MOV B
Intel_8080
Abstract machine that uses only one instruction
that uses only one instruction – obviating the need for a machine language opcode. With a judicious choice for the single instruction and given arbitrarily
One-instruction_set_computer
OPCODE SYSTEMS
OPCODE SYSTEMS
Girl/Female
Hindu
Code
Girl/Female
Tamil
Code
Female
Japanese
(1-儀, 2-典, 3-則, 4-法) Japanese unisex name NORI means 1) "ceremony, regalia," 2) "code, precedent," 3) "model, rule, standard," 4) "law, rule."
Surname or Lastname
English
English : variant spelling of Coad.
Surname or Lastname
English
English : nickname from Middle English pode ‘toad’.
Surname or Lastname
English
English : occupational name for a watchman or guard, from Old English weard ‘guard’ (used as both an agent noun and an abstract noun).Irish : reduced form of McWard, an Anglicized form of Gaelic Mac an Bhaird ‘son of the poet’. The surname occurs throughout Ireland, where three different branches of the family are known as professional poets.Surname adopted by bearers of the Jewish surname Warshawski, Warshawsky or some other Jewish name bearing some similarity to the English name.Americanized form of French Guerin.The surname Ward was brought to North America from England independently by several different bearers in the 17th and 18th centuries. Nathaniel Ward (1578–1652), author of the MA legal code, was born in Haverhill, Suffolk, England, and emigrated to Agawam (Ipswich, MA) in 1633. William Ward was one of the original settlers of Sudbury, MA, in about 1638. Miles Ward came from England to Salem, MA, in about 1639. Thomas Ward (d. 1689) settled in Newport, RI, in 1671; among his descendants were two governors of colonial RI.
Boy/Male
Bengali, Celebrity, Gujarati, Hindu, Indian, Kannada, Kashmiri, Malayalam, Marathi, Punjabi, Sanskrit, Sikh, Sindhi, Tamil, Telugu
Indestructible; Legend; Immortal; Happy; Oppose Destruction; Long Life; Unconquerable
Surname or Lastname
English
English : nickname for a person who insisted on a strict code of social behavior.German : topographic name for someone who lived on or by a hill, from Middle High German stickel ‘hill’, ‘slope’ + the suffix -er denoting an inhabitant; in the south an occupational name for someone who shapes and sets stakes in vineyards.
Boy/Male
British, English
From the Upper Forest
OPCODE SYSTEMS
OPCODE SYSTEMS
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Marathi, Sanskrit, Telugu
Beloved
Boy/Male
Gujarati, Hindu, Indian, Kannada, Telugu
Win over People; A King
Boy/Male
Norse
A tree in Volsung's palace.
Girl/Female
Hindu, Indian, Marathi
Divine Light
Female
Irish
Irish Gaelic form of Greek Elisabet, EILÃS means "God is my oath."
Girl/Female
Indian
Thought, Idea, Prayer
Girl/Female
American, Australian
Combination Name
Boy/Male
Hindu, Indian
Lord of Life
Boy/Male
Australian
Famous Wolf
Biblical
Making sweet; binding together
OPCODE SYSTEMS
OPCODE SYSTEMS
OPCODE SYSTEMS
OPCODE SYSTEMS
OPCODE SYSTEMS
v. t.
To oppose.
p. pr. & vb. n.
of Oppose
v. i.
To oppose.
imp. & p. p.
of Oppose
v. i.
To act adversely or in opposition; -- with against or to; as, a servant opposed against the act.
v. t.
To oppose again.
v. t.
To oppose; to fight against.
n.
The after song; the part of a lyric ode which follows the strophe and antistrophe, -- the ancient ode being divided into strophe, antistrophe, and epode.
v. i.
To make objection or opposition in controversy.
n.
To compete with; to strive against; as, to oppose a rival for a prize.
v. t.
To set against; to oppose.
n.
To place in front of, or over against; to set opposite; to exhibit.
v. t.
To cross; to oppose.
v. t.
To oppose; to resist.
n.
To resist or antagonize by physical means, or by arguments, etc.; to contend against; to confront; to resist; to withstand; as, to oppose the king in battle; to oppose a bill in Congress.
n.
Any system of rules or regulations relating to one subject; as, the medical code, a system of rules for the regulation of the professional conduct of physicians; the naval code, a system of rules for making communications at sea means of signals.
v. i.
To be set opposite.
pl.
of Apode
pl.
of Apode
n.
To put in opposition, with a view to counterbalance or countervail; to set against; to offer antagonistically.