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Intel 8086 KL Intel D8086. jpg
Produced From 1978 to nineties
Intel, AMD, NEC, Fujitsu, Harris (Intersil), OKI, Siemens AG, Texas Musical instruments, Mitsubishi.
Greatest extent. CPU clock rate a few MHz to 10 MHz
Min. characteristic size 3Ојm
Instruction arranged x86-16
Replacement, beneficiary 80186
45 pin DIP
The 8086 (also named iAPX 86) is a 16-bit microprocessor chip designed by Intel between early on 1976 and mid-1978, in order to was released. The 8086 offered rise to the x86 buildings of Intel's future cpus. The Intel 8088, released in 1979, was obviously a slightly customized chip with an external 8-bit data shuttle bus (allowing the application of cheaper and fewer helping logic chips), and is notable as the processor found in the original APPLE PC. Material
1 . you Background
1 . 2 The first x86 design
a couple of Details
installment payments on your 1 Vehicles and operation
2 . two Registers and instructions
installment payments on your 3 Flags
2 . 4 Segmentation
2 . 4. you Porting elderly software
2 . 5 Functionality
2 . 6 Floating point
3 Chip versions
several. 1 Derivatives and imitations
4 Hardware modes
your five Peripherals
six Microcomputers making use of the 8086
six Notes and references
almost eight External backlinks
In 1972, Intel launched the 8008, the first 8-bit microprocessor. That implemented a great instruction established designed by Datapoint corporation with programmable CRT terminals at heart, that also proved to be fairly general purpose. The product needed several additional ICs to produce a efficient computer, in part due to it being packed in a small 18-pin " memory-package", which ruled out the use of a independent address tour bus (Intel was primarily a DRAM company at the time).
Two years later, Intel introduced the 8080, employing the brand new 40-pin DIL packages formerly developed pertaining to calculator ICs to enable a separate address coach. It had a long instruction set that was source- (not binary-) appropriate for the 8008 and also included some 16-bit instructions to make programming much easier. The 8080 device, typically described as the first truly useful processor, was eventually replaced by the depletion-load structured 8085 (1977) which could manage a single 5V power supply rather than the three distinct operating trouble of previous chips. Various other well known 8-bit microprocessors that emerged of these years were Motorola 6800 (1974), General Instrument PIC16X (1975), MOS Technology 6502 (1975), Zilog Z80 (1976), and Motorola 6809 (1978). The first x86 design
The 8086 project made its debut in May 1976 and was originally planned as a short-term substitute for the ambitious and delayed iAPX 432 job. It was an effort to pull attention from your less-delayed sixteen and 32-bit processors of other companies (such as Motorola, Zilog, and Countrywide Semiconductor) as well as to counter-top the danger from the Zilog Z80 (designed by ex - Intel employees), which became very powerful. Both the architecture and the physical chip had been therefore created rather quickly with a small group of people, and using the same simple microarchitecture factors and physical implementation tactics as utilized for the slightly elderly 8085 (and for which the 8086 as well would function as a continuation).
Advertised as supply compatible, the 8086 was created to allow set up language pertaining to the 8008, 8080, or 8085 to become automatically changed into equivalent (sub-optimal) 8086 resource code, with little or no hand-editing. The programming model and instruction established was (loosely) based on the 8080 help to make this conceivable. However , the 8086 design was widened to support complete 16-bit processing, instead of the quite basic 16-bit capabilities of the 8080/8085.
New kinds of recommendations were added as well; total support pertaining to...