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The Intel MCS-51 ( commonly referred to as 8051 ) is a Harvard architecture, single chip microcontroller ( µC ) series which was developed by Intel in 1980 for use in embedded systems .< ref > John Wharton: An Introduction to the Intel MCS-51 < sup > TM </ sup > Single-Chip Microcomputer Family, Application Note AP-69, May 1980, Intel Corporation .</ ref >< ref > John Wharton: Using the Intel MCS-51 < sup > TM </ sup > Boolean Processing Capabilities, Application Note AP-70, May 1980, Intel Corporation .</ ref > Intel's original versions were popular in the 1980s and early 1990s.
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Intel and MCS-51
# REDIRECT Intel MCS-51
While Intel no longer manufactures the MCS-51, binary compatible derivatives remain popular today.
Intel discontinued its MCS-51 product line in March 2007, however there are plenty of enhanced 8051 products or silicon intellectual property added regularly from other vendors.
* MCS-51 < sup > TM </ sup > Macro Assembler User's Guide, Publication number 9800937, Intel Corporation.
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Intel and commonly
It used the same, commonly available, physical 242 pin connector used by Intel Slot 1 processors but rotated by 180 degrees to connect the processor to the motherboard.
These architectures range from the Intel / AMD 32-bit / 64-bit architectures commonly found in personal computers to the ARM architecture commonly found in embedded systems and the IBM eServer zSeries mainframes.
The program counter ( PC ), commonly called the instruction pointer ( IP ) in Intel x86 and Itanium microprocessors, and sometimes called the instruction address register ( IAR ) or just part of the instruction sequencer, is a processor register that indicates where a computer is in its program sequence.
However, Wintel is now commonly used to refer to a system running a modern Microsoft operating system on any modern x86 compatible CPU, manufactured by either Intel or AMD.
After the microprocessor was released, a bug was discovered in the floating point unit, commonly called the " Pentium Pro and Pentium II FPU bug " and by Intel as the " flag erratum ".
The Intel 8088 and 8086 were the first CPUs to have an instruction set that is now commonly referred to as x86.
It commonly features speeches from people such as Bill Gates, and generally has several sponsors including Intel, AMD, previously ATI, and others.
The IBM Personal Computer AT, more commonly known as the IBM AT and also sometimes called the PC AT or PC / AT, was IBM's second-generation PC, designed around the 6 MHz Intel 80286 microprocessor and released in 1984 as machine type 5170.
High-bandwidth Digital Content Protection ( HDCP ; commonly, though incorrectly, referred to as High-Definition Copy ( right ) Protection ) is a form of digital copy protection developed by Intel Corporation to prevent copying of digital audio and video content as it travels across connections.
The invalid operand with locked CMPXCHG8B instruction bug, commonly referred to as the Pentium F00F bug ( as shorthand for, the hexadecimal encoding of one offending instruction ), is a design flaw in the majority of Intel Pentium, Pentium MMX, and Pentium OverDrive processors ( all in the P5 microarchitecture ).
The earliest version of Windows to support a limited form of preemptive multitasking was Windows 2. 1x, which used the Intel 80386's Virtual 8086 mode to run DOS applications in virtual 8086 machines -- commonly known as " DOS boxes "-- which could be preempted.
Indeo Video ( commonly known now simply as " Indeo ") is a video codec developed by Intel in 1992.
For example, on the Intel 8259 family of PICs there are eight interrupt inputs commonly referred to as IRQ0 through IRQ7.
Intel and referred
In the announcement, Sanders referred to the partnership as creating a " virtual gorilla " that would enable AMD to compete with Intel on fabrication capacity while limiting AMD's financial outlay for new facilities.
The IEEE and Intel referred to the design as the " i860 64-Bit Microprocessor ".
But the name was something of a misnomer, as the 8K referred to its original size on the Intel 8080's instruction set.
The practice is outlined in the Expanded Memory Specification ( EMS ), which was developed jointly by Lotus Software, Intel, and Microsoft, so that this specification was sometimes referred to as " LIM EMS.
At the time of release in January 1985, the Macintosh XL was colloquially referred to as the " Hackintosh ", although this name has since been used more generally to describe Macintosh computers assembled from unusual combinations of parts or, after Apple's transition to Intel processors, to denote PCs running OSx86, a hacked version of Mac OS X.
In fact, sources indicate that inside Intel the P6 was initially referred to as the " Metaflow processor.
DTCP has also been referred to as " 5C " content protection, a reference to the five companies who created DTCP ; Hitachi, Intel, Matsushita, Sony, and Toshiba.
Prior to the name's announcement, Intel referred to it as Common System Interface ( CSI ).
Formerly referred to by Intel as a Multimedia Timer, the term HPET was selected to avoid confusion with the multimedia timers software feature introduced in the MultiMedia Extensions to Windows 3. 0.
Intel and 8051
* Intel 8051
51-FORTH is an implementation of the Forth programming language for the Intel 8051 microcontroller.
* Intel 8051 ( 1980 Harvard architecture microcontroller )
The 8031 was a cut down version of the original Intel 8051 that did not contain any internal program memory ( ROM ).
The original Intel 8051 ran at 12 clock cycles per machine cycle, and most instructions executed in one or two machine cycles.
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