ABEL (short for Advanced Boolean Expression Language) is a programming language and an associated set of design tools for programming PLDs. It was created in 1983 by Data I/O Corporation, in Redmond, Washington. A programming language or computer language is a standardized communication technique for expressing instructions to a computer. ... A programmable logic device or PLD is an electronic component used to build digital circuits. ...
ABEL includes both concurrent equation and truth table logic formats as well as a sequential state machine description format. A preprocessor with syntax loosely based on DEC's Macro-11 is also included.
In addition to being used for logic descriptions, ABEL may also be used to describe test vectors (patterns of inputs and expected outputs) that may be downloaded to a hardware device programmer along with the compiled and fuse-mapped PLD programming data.
Other PLD design languages originating in the same era include CUPL and PALASM. Since the advent of larger Field Programmable Gate Arrays (FPGAs), PLD languages have fallen out of favor as standard Hardware Description Languages (HDLs) such as VHDL and Verilog have gained in popularity. Nonetheless after two decades ABEL remains in use by thousands of PLD programmers worldwide. PALASM is an early hardware description language, used to program programmable array logic devices introduced by Monolithic Memories, Inc. ... A field-programmable gate array or FPGA is a gate array that can be reprogrammed after it is manufactured, rather than having its programming fixed during the manufacturing — a programmable logic device. ... In electronics, a hardware description language or HDL is any language from a class of computer languages for formal description of electronic circuits. ... VHDL or VHSIC Hardware Description Language, is commonly used as a design-entry language for FPGAs and ASICs in electronic design automation. ... The Verilog HDL is a hardware description language, used for the design of ASICs and FPGAs in order to make digital circuits. ...
The original ABEL development team (led by Dr. Kyu Lee) included Mary Bailey, Bjorn Benson, Walter Bright, Michael Holley, Charles Olivier and David Pellerin. Walter Bright is a computer programmer known for the design of the D programming language. ...
Through a series of acquisitions, ABEL is now owned by Xilinx Inc. U.S. corporation Xilinx, Inc. ...
With its emphasis on program safety, it is not surprising that Ada is a strongly typed language: all data elements must be declared as storing a particular type or subtype, and type enforcement is strictly applied both within and between modules.
Curry is a fairly recent functional logic programminglanguage, developed as a research vehicle to test ideas in the areas of narrowing, unification, and non-determinism.
The basic view of programming exhibited by Escher and related languages is the a program is a representation of a theory in some logic framework, and the program's execution (computation) is a deduction from the theory.
Languages whose only characteristic is to express circuit connectivity between a hierarchy of blocks are properly classified as netlist languages.
A simulation program, designed to implement the underlying semantics of the language statements, coupled with simulating the progress of time, provides the hardware designer with the ability to model a piece of hardware before it is created physically.
An HDLprogram may be tested in hardware, such as by uploading it into a programmable logic device or even by producing a chip based on its specification.
Feeds |
Contact