| QS1 QS0 8087 operation | 1 1 If earlier comparison succeeds, 8087 fetches the subsequent byte else NOP |
|---|
Which of the following is the function of 8087 coprocessor?
Why 8087 is referred to as Coprocessor? i) Because 8087 is used in parallel with main processor in a system, rather than serving as a main processor itself. ii) Because 8087 is used
in serial with
main processor in a system, rather than serving as a main processor itself.
What are the instructions available in 8087?
- It supports data of type integer, float, and real types ranging from 2-10 bytes.
- The processing speed is so high that it can calculate multiplication of two 64-bits real numbers in ~27 μs and can also calculate square-root in ~35 μs.
- It follows IEEE floating point standards.
Why did Intel create an 8087 to be a coprocessor of 8086?
The Intel 8087, announced in 1980, was the first x87 floating-point coprocessor for the 8086 line of microprocessors. The purpose of the 8087 was
to speed up computations for floating-point arithmetic, such as addition, subtraction, multiplication, division, and square root
.
Which of the following is the coprocessor of 8086?
Which is the coprocessor of 8086? Solution: Explanation:
8087
is the coprocessor for both 8086 and 8088. 8089 is also a coprocessor of 8086 and 80888.
What are the two major sections in a coprocessor?
control unit and numeric control unit
.
How 8086 and 8087 works together?
8087 gives an active low request pulse
. 8086 completes the current bus cycle and gives the grant pulse and enters the hold state. 8087 uses the shared system bus to perform the data transfer with the memory. 8087 gives the release pulse and returns the system bus back to the microprocessor.
How are negative numbers stored in a coprocessor?
Explanation: In a coprocessor, negative numbers are stored
in 2’s complement with its leftmost sign bit of 1
whereas positive numbers are stored in the form of true value with its leftmost sign bit of 0. … Explanation: Signed integers in a coprocessor are stored as a 16-bit word, 32-bit double word or 64-bit quadword.
How many types of basic multiprocessor configurations are there?
There are typically
3 types
of configurations: Master / Slave Configuration, Loosely Coupled Configuration, and Symmetric Configuration.
Which IC is used as clock generator in min and max mode of 8086?
A typical minimum mode configuration of the 8086 is shown in Fig. 18.1 . The figure illustrates the
8284 IC
generating the clock, Ready and Reset signals for the 8086. The decoder is used to generate the four control signals MEMR , MEMW , IOR , and IOW using the M/ IO , RD , and WR signals of the 8086.
What are the main features of Intel 8086?
1) The 8086 is a 16-bit microprocessor. The term “16-bit” means that its
arithmetic logic unit, internal registers
and most of its instructions are designed to work with 16-bit binary words. 2) The 8086 has a 16-bit data bus, so it can read data from or write data to memory and ports either 16 bits or 8 bits at a time.
Is 8086 a RISC or CISC?
The 8086-based processors are an example of a complex instruction set computer, or
CISC, architecture
. Many newer processor designs use a reduced instruction set computer, or RISC, architecture instead.
Is 8086 still used?
The processor in the IBM PC was the 8088, a variant of the 8086 with an 8-bit bus. The success of the IBM PC made the 8086 architecture a standard that still persists,
42 years later
. In any case, the decision to use the 8088 processor cemented the success of the x86 family.
What is the advantage of coprocessor?
A coprocessor
offloads specialized processing operations, thereby reducing the burden on the basic microprocessor circuitry and allowing it to work at optimum speed
. In the early years of personal computing, the coprocessor was physically separate from the main microprocessor.
Which is the coprocessor?
A coprocessor is
a computer processor used to supplement the functions of the primary processor
(the CPU). Operations performed by the coprocessor may be floating point arithmetic, graphics, signal processing, string processing, cryptography or I/O interfacing with peripheral devices.
Which is not valid instruction?
Which of the following instruction is not valid? Explanation: Both the source and destination operands cannot be memory locations
except for string instructions
.
