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Register in which intermediate arithmetic and logic results of a CPU are stored
(CPU), the accumulator is a register in which intermediate arithmetic logic unit results are stored. Without a register like an accumulator, it would be
Accumulator_(computing)
Topics referred to by the same term
Look up accumulator in Wiktionary, the free dictionary. Accumulator may refer to: Accumulator (bet), a parlay bet Accumulator (computing), in a CPU, a
Accumulator
First electronic general-purpose digital computer
Accumulator 1 Accumulator 2 Divider and Square Rooter Accumulator 3 Accumulator 4 Accumulator 5 Accumulator 6 Accumulator 7 Accumulator 8 Accumulator
ENIAC
Operation common in numerical signal processing
and adds that product to an accumulator. The hardware unit that performs the operation is known as a multiplier–accumulator (MAC unit); the operation itself
Multiply–accumulate_operation
in the history of computing: from prehistory until 1949. For narratives explaining the overall developments, see History of computing. The Ishango bone
Timeline of computing before 1950
Timeline_of_computing_before_1950
computers typically had a single accumulator and an extension, referred to as, e.g., Upper and Lower Accumulator, Accumulator and Multiplier-Quotient (MQ)
History of computing hardware (1960s–present)
History_of_computing_hardware_(1960s–present)
Digital signal generator
modulators/demodulators. An NCO generally consists of two parts: A phase accumulator (PA), which sums an input frequency control word to its stored output
Numerically controlled oscillator
Numerically_controlled_oscillator
University Computing History Computer Histories – An introductory course on the history of computing Revolution – The First 2000 Years Of Computing, Computer
History_of_computing_hardware
In cryptography, an accumulator is a one way membership hash function. It allows users to certify that potential candidates are a member of a certain
Accumulator_(cryptography)
to an accumulator. The high order bits of the accumulator form the output address, while the typically larger number of bits in the accumulator and addition
Waveform_buffer
Instructional model of a computer
simple two function (addition and subtraction) calculator known as the Accumulator and a resettable counter known as the program counter. The program counter
Little_Man_Computer
Mathematical model describing how an output of a function is computed given an input
above-mentioned Turing machine model. Stack machine (0-operand machine) Accumulator machine (1-operand machine) Register machine (2,3,... operand machine)
Model_of_computation
First electronic stored-programme computer, 1948
be computed as −(−x−y). Therefore, adding two numbers together, X and Y, required four instructions: LDN X // load negative X into the accumulator SUB
Manchester_Baby
Open standard for programming heterogenous computing systems, such as CPUs or GPUs
platform and execute programs on the compute devices. OpenCL provides a standard interface for parallel computing using task- and data-based parallelism
OpenCL
Mechanical machine for arithmetic operations for absolute calculators
features were not present in computing (four operations) machines for many decades. Facit-T (1932) was the first 10-key computing machine sold in large numbers
Mechanical_calculator
Vacuum-tube 1950s computer system
Holbrook, Bernard D.; Brown, W. Stanley. "Computing Science Technical Report No. 99 – A History of Computing Research at Bell Laboratories (1937–1975)"
IBM_650
Early mechanical calculator
It consists of two attached parallel parts: an accumulator, which can be thought of as an accumulator register which is found in older processor instruction
Stepped_reckoner
Sequence of program instructions invokable by other software
the first accumulator-based machines to have a subroutine call instruction that saved the return address in a stack addressed by an accumulator or index
Function (computer programming)
Function_(computer_programming)
Business computer
Museum of Computing. pp. 21–22. ISBN 9780956795632. Johnson, Roger; Murrell, Kevin (2017). The HEC computer. The National Museum of Computing. p. 23. ISBN 9780956795632
Hollerith_Electronic_Computer
AI accelerator ASIC by Google
filing, Singular Computing specifically called out Google's use of bfloat16, as that exceeds the dynamic range of float16. Singular Computing claims non-standard
Tensor_Processing_Unit
19th-century mechanical calculator patented by French inventor Thomas de Colmar
perform long multiplications and divisions effectively by using a movable accumulator for the result. Patented in France by Thomas de Colmar in 1820 and manufactured
Arithmometer
16-bit IBM minicomputer introduced in 1965
IOR function does not compute I or J at all. Instead, it replaces the above four words with the following: LD L I Load accumulator with I (two-word instruction)
IBM_1130
Early mechanical calculator
the accumulator. After re-zeroing the machine, numbers are dialed in one after the other. The following table shows all the steps required to compute 12
Pascaline
1940s–1950s British computer
register Store (and optionally clear) accumulator Conditional goto Read input tape Print character Round accumulator No-op Stop There was no division instruction
EDSAC
Experimental Soviet ternary computer
successor to the original Setun of 1959, it abandoned the single-address accumulator design of its predecessor for a two-stack stack machine architecture
Setun-70
CMOS microprocessor in the 6502 family
counter and address bus. The register set is small, with a single 8-bit accumulator (A), two 8-bit index registers (X and Y), an 8-bit status register (P)
WDC_65C02
16-bit minicomputer series
source accumulator to the destination accumulator COM — move the bitwise complement of the source accumulator to the destination accumulator ADD — add
Data_General_Nova
Aspect of the instruction set architecture of CPUs
Lower accumulator 8003 Upper accumulator Only valid from console For 5K or 10K 7070 00xx Index register xx 9991 Accumulator 1 9992 Accumulator 2 9993
Addressing_mode
Abstract model of computation
contains. We will call such an organ an Accumulator. It is quite conventional in principle in past and present computing machines of the most varied types,
Random-access_machine
Late 19th-century machine for summarizing information stored on punch cards
Columbia University Computing History. da Cruz, Frank (16 December 2018). "The IBM 285 Tabulator". Columbia University Computing History. "The punched
Tabulating_machine
Method of detecting shapes within images
obtained as local maxima in a so-called accumulator space that is explicitly constructed by the algorithm for computing the Hough transform. Mathematically
Hough_transform
Computer architecture bit width
or four longwords in memory. The ICL 2900 Series provided a 128-bit accumulator, and its instruction set included 128-bit floating-point and packed decimal
128-bit_computing
onto the top of the accumulator stack; 'dup' caused a copy of the top-most value (x) to be pushed onto the top of the accumulator stack; Multiply (×)
GEORGE_(programming_language)
Minicomputer product line
CLA (CLear Accumulator), CLL (CLear Link), and IAC (Increment ACcumulator) first clears the AC and Link, then increments the accumulator, leaving it
PDP-8
8-bit microprocessor
1976; it played an important role in the evolution of early personal computing. It was designed to be software-compatible with the Intel 8080, offering
Zilog_Z80
Type of abstract computing machine
), Increment accumulator, Decrement accumulator, Clear accumulator, Add the contents of register r {\displaystyle r} to the accumulator, Proper-Subtract
Register_machine
Artistic concept relating to perspective
step, the image is mapped onto a bounded space called the accumulator space. The accumulator space is partitioned into units called cells. Barnard assumed
Vanishing_point
Single chip microcontroller series by Intel
@A+DPTR or MOVC A,@A+PC instructions. The address is computed as the sum of the 8-bit accumulator and a 16-bit register (PC or DPTR). Special jump and
Intel_MCS-51
First computer to use magnetic disk storage
containing ten 10-character "Accumulators". As a destination L specifies addition, M specifies subtraction. (Numbers in these accumulators were stored in ten's
IBM_305_RAMAC
Task of creating a processor
project schedule of a CPU. Key CPU architectural innovations include accumulator, index register, general-purpose register, cache, virtual memory, instruction
Processor_design
European particle physics research centre
for the development of grid computing, hosting projects including the Enabling Grids for E-sciencE (EGEE) and LHC Computing Grid. It also hosts the CERN
CERN
Quickly accessible working storage available as part of a digital processor
data. On some older computers, a special data register known as the accumulator is used implicitly for many operations. Examples include IBM 704, the
Processor_register
Instructions directly executable by a computer
In computing, machine code is data encoded and structured to control a computer's central processing unit (CPU) via its programmable interface. A computer
Machine_code
Variable that represents an argument to a function
assignment (this was removed in Ada 95 to remove the need for an auxiliary accumulator variable). These are analogous to the notion of a value in an expression
Parameter (computer programming)
Parameter_(computer_programming)
Typographic symbol (#)
#10, which means "load accumulator A with the value 10" in MOS 6502 assembly language. in HTML, CSS, SVG, and other computing applications # is used to
Number_sign
Abstract machine that uses only one instruction
variant is also possible with two operands and an internal accumulator, where the accumulator is subtracted from the memory location specified by the first
One-instruction_set_computer
Combinational digital circuit
In computing, an arithmetic logic unit (ALU) is a combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers
Arithmetic_logic_unit
Open-source data analytics cluster computing framework
Scott; Stoica, Ion. Spark: Cluster Computing with Working Sets (PDF). USENIX Workshop on Hot Topics in Cloud Computing (HotCloud). "Spark 2.2.0 Quick Start"
Apache_Spark
Family of instruction set architectures
AL/AH/AX/EAX/RAX: Accumulator CL/CH/CX/ECX/RCX: Counter (for use with loops and strings) DL/DH/DX/EDX/RDX: Extend the precision of the accumulator (e.g. combine
X86
Mainframe computer systems made by IBM through the 1950s and early 1960s
architectures into a single design both for commercial computing and for scientific and engineering computing. However, its architecture is not compatible with
IBM_700/7000_series
Early computer programming languages
multiplication fit into lower accumulator. c@VA t@IC x@½C y@RC z@NC INTEGERS +5 →c # Put 5 into c →t # Load argument from lower accumulator # to variable t +t TESTA
Autocode
DDA are implemented as accumulators, with the numeric result converted back to a pulse rate by the overflow of the accumulator. The primary advantages
Digital_differential_analyzer
Base memory unit handled by a computer
In computing, a word is a fixed-sized datum handled as the natural or historical unit of data by the instruction set or the hardware of a processor. The
Word_(computer_architecture)
American computer technology company
intersect a ray with an AABB and return hit information. Framebuffer accumulator: This unit would receive commands from the ALUs to add colour to a given
Caustic_Graphics
Early British computer
12-position accumulator as a push-down pop-up stack. Using a variable name in a program (e.g., 'd') brought the value of variable 'd' into the accumulator (i.e
English_Electric_DEUCE
Hypothetical computing devices
A Turing machine is a hypothetical computing device, first conceived by Alan Turing in 1936. Turing machines manipulate symbols on a potentially infinite
Turing_machine_equivalents
Instructions a computer can execute
hour (in 1940s currency) in electricity when idle. It had 20 base-10 accumulators. Programming the ENIAC took up to two months. Three function tables were
Computer_program
Computer made at MIT in 1962
address - Halt, clear accumulator, enable tape mark write gate, transfer accumulator to relay register, read relay register to accumulator, no operation, complement
LINC
Model that describes the programmable interface of a computer processor
are used to access memory. 1-operand (one-address machines), so called accumulator machines, include early computers and many small microcontrollers: most
Instruction_set_architecture
American computer manufacturer
eight vector accumulator registers respectively, with each set expanded in the C4600 series to 32 address, 28 scalar, and 16 vector accumulator registers
Convex_Computer
Missile guidance computer
registers: the accumulator (A), lower accumulator (L), and the number register (N). Only the A and L registers are addressable. Accumulator (A-register)
D-37C
First commercial electronic computer
2", A History of Computing Technology, IEEE Computer Society Press, ISBN 978-0-8186-7739-7 Lavington, Simon (2019), Early Computing in Britain:Ferranti
Ferranti_Mark_1
Librascope General Purpose computer (1956)
registers: C the counter register, R the instruction register and A the accumulator register Instruction format: Sixteen instructions using half-word format
LGP-30
computing, instruction sets which have more instructions from which to choose.) With von Neumann architecture, main memory along with the accumulator
History_of_computer_science
Type of subroutine call
To call the routine, the address of the caller would be placed in the accumulator and then the code would jump to the starting point of the routine. The
Wheeler_Jump
British stored-program computer, 1949
"The University Of Manchester Computing Machine". curation.cs.manchester.ac.uk. The University Of Manchester Computing Machine(Digital 60). Riemann hypothesis
Manchester_Mark_1
Neumann Medal Grace Murray Hopper Award History of computing History of computing hardware History of computing hardware (1960s–present) History of software
List of pioneers in computer science
List_of_pioneers_in_computer_science
For these reasons, the ISA is one of the most important abstractions in computing today. An ISA defines everything a machine language programmer needs to
Comparison of instruction set architectures
Comparison_of_instruction_set_architectures
American computer company
stripe which was part of the ledger card. This balance was read into the accumulator when the card was inserted into the carriage. The Sensitronic was followed
Burroughs_Corporation
Modification using the principle of template matching
appropriate cell in a matrix called the Accumulator matrix is incremented. The cell with maximum 'votes' in the Accumulator matrix can be a possible point of
Generalised_Hough_transform
Instruction in computer program
Trampoline (computing) At least conceptually; see out-of-order execution. E.g. Compare accumulator to storage (CAS) and compare Logical accumulator to storage
Branch_(computer_science)
1962 computer model
History of computing hardware Gray, G.; Smith, R. (July 1998). "Sperry Rand's transistor computers". IEEE Annals of the History of Computing. 20 (3): 16–26
UNIVAC_III
Multipurpose mainframe computer (1960)
(or shift count, for shift instructions). The CPU contains a 48-bit accumulator (A), a 48-bit Auxiliary Arithmetic register (Q), a 15-bit program counter
CDC_1604
Computer format for representing real numbers
In computing, fixed-point is a method of representing fractional (non-integer) numbers by storing a fixed number of digits of their fractional part. Dollar
Fixed-point_arithmetic
Extension to the MIPS architecture
manipulating bytes in registers, performing arithmetic with the accumulator, and accumulator access. Gwennap, Linley (18 November 1996). "Digital, MIPS Add
MDMX
fixed-function hardware. A common example is a graphics processing unit. accumulator A register that holds the result of previous operation in ALU. It can
Glossary of computer hardware terms
Glossary_of_computer_hardware_terms
Topics referred to by the same term
accusative case, used for direct objects Accelerator (disambiguation) Accumulator (disambiguation) This disambiguation page lists articles associated with
ACC
Missile guidance computer
Description ------------ ---- ----------- 00 20, s SAL Split accumulator left shift 00 22, s ALS Accumulator left shift 00 24, 2 SLL Split left word left shift
D-17B
Register in a computer's CPU
arithmetic data to be processed in the ALU first goes to MBR and then to accumulator register, before being processed in the ALU. The MDR is a two-way register
Memory_buffer_register
Free software project
Shirako; D. M. Peixotto; V. Sarkar; W. N. Scherer III (2009). Phaser Accumulators: a New Reduction Construct for Dynamic Parallelism (PDF). IEEE International
The Computer Language Benchmarks Game
The_Computer_Language_Benchmarks_Game
perform the following operations on an accumulator: Double the contents of the accumulator (if the accumulator stores numbers in binary, as is usually
Kochanski_multiplication
Educational computer programming language
the program. The fundamental principle of CESIL is the use of a single accumulator, which handles mathematical operations. Numeric values are stored in
CESIL
First IBM supercomputer using dedicated transistors
Scientific Computing Center as an upgrade to MCP, along with an updated variant of FORTRAN IBM 608, the first commercially available transistorized computing device
IBM_7030_Stretch
Computer architecture bit width
floating point; 32-bit, 64-bit, and 128-bit packed decimal and a 128-bit accumulator register. The architecture has survived through a succession of ICL and
64-bit_computing
8-bit microprocessor
such as PUSH PSW, POP PSW affect the Program Status Word (accumulator and flags). The accumulator stores the results of arithmetic and logical operations
Intel_8085
Irish accountant and inventor
the History of Computing. 1 (4): 1–17. doi:10.1109/MAHC.2024.3369024. "Cork's extraordinary genius who influenced the history of computing". The Irish Times
Percy_Ludgate
8-bit microcontroller product lines from STMicroelectronics
be: The accumulator A The X register 8-bit absolute address Indexed (X) Indexed plus 8-bit offset (address8,X) Register plus offset computes a full-width
ST6_and_ST7
Small, medium-speed transistor digital computer manufactured in the 1960s
in his 1980 Association for Computing Machinery (ACM) Turing Award lecture. The 803B at The National Museum of Computing is now working well enough to
Elliott_803
World's first marketed all-transistorized calculator
memory of the 608 can store 40 nine-digit numbers, and it has an 18-digit accumulator. In raw speed terms, it can perform 4,500 additions per second, it can
IBM_608
Algorithm that multiplies two signed binary numbers in two's complement notation
and yi−1 are considered. Where these two bits are equal, the product accumulator P is left unchanged. Where yi = 0 and yi−1 = 1, the multiplicand times
Booth's multiplication algorithm
Booth's_multiplication_algorithm
4-bit microprocessor
2025), the chip marked both a technological and economic milestone in computing. The 4-bit 4004 CPU was the first significant commercial example of large-scale
Intel_4004
Use of functions that call themselves
accumulator variable x. For example, a factorial function may be implemented iteratively in C by assigning to a loop index variable and accumulator variable
Recursion_(computer_science)
8-bit microprocessor from 1975
bytes forward from the start of the branch instruction). Accumulator mode operates on the accumulator register and does not need any operand data. Immediate
MOS_Technology_6502
Algorithm in numerical analysis
pseudocode, the algorithm will be: function KahanSum(input) // Prepare the accumulator. var sum = 0.0 // A running compensation for lost low-order bits. var
Kahan_summation_algorithm
General-purpose programming language
programming language designed for numeric computation and scientific computing. Fortran was originally developed by IBM with a reference manual being
Fortran
First electronic computer to be built at the Institute for Advanced Study
Domestic Electronic Digital Computing Systems. Martin H. Weik (1957). A Second Survey of Domestic Electronic Digital Computing Systems, BRL Report No. 1010
IAS_machine
Instruction set architecture
and R4000, establishing the Advanced Computing Environment (ACE) consortium to advance its Advanced RISC Computing (ARC) standard, which aimed to establish
MIPS_architecture
CPU register used for modifying operand addresses
provided general-purpose registers (called "accumulators" in the Nova and Eclipse), rather than separate accumulators and index registers, as did their Eclipse
Index_register
1962 second-generation computer
indicate the current status of the program counter, registers, arithmetic accumulator, and system errors. Input/Output is by direct parallel connections to
NCR_315
Early vacuum-tube computer system
Williams tubes with a capacity of 512 bits each for the two 512-character accumulators. A complete system included the following units: IBM 702 Central Processing
IBM_702
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ACCUMULATOR COMPUTING
ACCUMULATOR COMPUTING
ACCUMULATOR COMPUTING
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