One of the following signals belongs to the 8087 coprocessor is a. HOLD
b. BUSY
c. TEST
d. NMI

1 Answer

Answer :

c. TEST

Related questions

Description : If ______ and ________ connections are made so that an error condition in 8087 can interrupt to the processor. a) BHE, RQ/GT1 b) BUSY, TEST c) INT, NMI d) RQ/GT0, RQ/GT1

Last Answer : c) INT, NMI

Description : ___ Connection and the _______ instruction will solve the problem of synchronization between processor and coprocessor. a) INT & NMI, WAIT b) RQ/GT0 & RQ/GT1, FWAIT c) BUSY & TEST, FWAIT d) S0 & QS0, WAIT

Last Answer : b) RQ/GT0 & RQ/GT1, FWAIT

Description : In 8087 coprocessor one of the following instructions is not valid a. FSIN b. FPTAN c. FIDIV d. FSQRT

Last Answer : a. FSIN

Description : ______ input is available, so that another coprocessor can be connected and function in _________ with the 8087. . a) RQ/GT0, parallel b) RQ/GT1, parallel c) QS1 & QS0, parallel d) S0 & S1, parallel.

Last Answer : a) RQ/GT0, parallel

Description : 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 ... math computations. a) i & iii b) ii & iii c) iii only. d) i only.

Last Answer : c) iii only.

Description : n 8086 microprocessor the following has the highest priority among all type interrupts. a) NMI b) DIV 0 c) TYPE 255 d) OVER FLOW

Last Answer : a) NMI

Description : In 8086 microprocessor one of the following statements is not true.a)Coprocessor is interfaced in MAX mode b)Coprocessor is interfaced in MIN mode c)I/O can be interfaced in MAX / MIN moded)Supports pipelining

Last Answer : b)Coprocessor is interfaced in MIN mode

Description : Which of the following is of compare instruction in 8087? a) FTST b) FPREM c) FPATAN d) FLDI

Last Answer : a) FTST

Description : In 8087, which instruction is used for division real reversed______. a) FDIV b) FIDIVR c) FDIVR d) FDIVRP

Last Answer : c) FDIVR

Description : In 8087, _______ many register stack are there? And of _____ registers. These registers are used as _________ stack. a) 7, 40 bit, FIFO. b) 8, 60 bit, LILO. c) 8, 80 bit, LIFO d) 7, 80 bit, FILO.

Last Answer : b) 8, 60 bit, LILO.

Description : 8087 connection to 8086, to enable the _________ bank of memory _______pins are to be connected. a) Lower, BHE b) Upper, BHE c) Lower, INT d) Upper, INT.

Last Answer : a) Lower, BHE

Description : 8088 microprocessor differs with 8086 microprocessor in a) Data width on the output b) Address capability c) Support of coprocessor d) Support of MAX / MIN mode

Last Answer : a) Data width on the output

Description : In 8086 microprocessor one of the following statements is not true. a) Coprocessor is interfaced in MAX mode b) Coprocessor is interfaced in MIN mode c) I/O can be interfaced in MAX / MIN mode

Last Answer : b) Coprocessor is interfaced in MIN mode

Description : Explain the signals HOLD, READY and SID

Last Answer : HOLD indicates that a peripheral such as DMA controller is requesting the use of address bus, data bus and control bus. READY is used to delay the microprocessor ... slow responding peripheral is ready to send or accept data. SID is used to accept serial data bit by bit

Description : IBM 7000 digital computer a. Belongs to second generation b. Uses VLSI c. Employs semi conductor memory d. Has modular constructions

Last Answer : d. Has modular constructions

Description : BM 7000 digital computer a. Belongs to second generation b. Uses VLSI c. Employs semiconductor memory d. Has modular constructions

Last Answer : c. Employs semiconductor memory

Description : Control signals used for DMA operation are ____________

Last Answer : HOLD & HLDA.

Description : Which of the following is form of semi conductor memory in which it is possible to change the contents of selected memory locations by applying suitable electrical signals? a. CAM b. ROM c. EPROM d. Abacus

Last Answer : c. EPROM

Description : In which form CPU provide output: a. Computer signals b. Digital signals c. Metal signals d. None of these

Last Answer : b. Digital signals

Description : Interfacing LCD with 89C51 _____ data lines are used along with the _____ signals. a) 6, RS, RW b) 5, RW, EN c) 8, RS, EN, RW d) 9, RS, EN, RW

Last Answer : a) 6, RS, RW

Description : How Can Signals Be Classified For The 8085 Microprocessor?

Last Answer : Answer :The signals of the 8085 microprocessor based on their functions can be classified into 7 categories namely: Frequency and power signals Address and data buses The control bus Interrupt Signals Serial Input / Output signals DMA signals Reset Signals

Description : What is the orbit height of a GPS satellite? A. 10,898 nmi B. 10,898 mi C. 10,898 km D. 10, 898 m

Last Answer : A. 10,898 nmi

Description : Which is an integral part of any microcomputer system and its primary purpose is to hold program and data: a. Memory unit b. Register unit c. A and B d. None of these

Last Answer : a. Memory unit

Description : To put the 8085 microprocessor in the wait state(i) lower the-HOLD input (ii) lower the READY input (iii) raise the HOLD input(iv) raise the READY input

Last Answer : (ii) lower the READY input

Description : Registers, which are partially visible to users and used to hold conditional, are known as a. PC b. Memory address registers c. General purpose register d. Flags

Last Answer : c. General purpose register

Description : To prevent another master from taking over the bus during a critical operation, the 486 can assert its _____signal. a) LOCK# or PLOCK# b) HOLD or BOFF c) HLDA d) HOLD

Last Answer : a) LOCK# or PLOCK#

Description : What is a coprocessor ?

Last Answer : Most computers have one or more co-processors. A co-processor is a special type of microprocessor that can perform one or more tasks. The most common coprocessor is the Math co-processor. It ... Math co-processor inside the Pentium. Examples: Intel 8087, 80287, 80387 Cyrix 83DS7, EMC87 etc.

Description : Explain ALIGN & ASSUME

Last Answer : The ALIGN directive forces the assembler to align the nextsegment at an address divisible by specified divisor. The format is ALIGN number where number can be 2, 4, 8 or 16. Example ALIGN 8. The ASSUME ... the segment registers at execution time. Example ASSUME CS: code, DS: data, SS: stack

Description : What is linker

Last Answer : A linker is a program used to join together several object files into one large object file. For large programs it is more efficient to divide the large program modules into ... & debugged. When all the modules work they are linked together to form a large functioning program.

Description : What is loader

Last Answer : The loader copies the program into the computer’s main memory at load time and begins the program execution at execution time.

Description : What is assembler

Last Answer : The assembler translates the assembly language program text which is given as input to the assembler to their binary equivalents known as object code. The time required to translate the assembly code ... time. The assembler checks for syntax errors & displays them before giving the object code.

Description : How does the microprocessor differentiate between data and instruction

Last Answer : When the first m/c code of an instruction is fetched and decoded in the instruction register, the microprocessor recognizes the number of bytes required to fetch the entire ... will be considered as data & the byte after the data will be treated as the next instruction.

Description : What is Microcontroller and Microcomputer

Last Answer : Microcontroller is a device that includes microprocessor; memory and I/O signal lines on a single chip, fabricated using VLSI technology. Microcomputer is a computer that is designed using microprocessor as its CPU. It includes microprocessor, memory and I/O.

Description : Why do we use XRA A instruction

Last Answer : The XRA A instruction is used to clear the contents of the Accumulator and store the value 00H.

Description : Define stack and explain stack related instructions

Last Answer : The stack is a group of memory locations in the R/W memory thatis used for the temporary storage of binary information during the execution of the program. The stack related instructions are PUSH & POP

Description : What is the use of bi-directional buffers?

Last Answer : It is used to increase the driving capacity of the data bus. The data bus of a microcomputer system is bi-directional, so it requires a buffer that allows the data to flow in both directions.

Description : What is the use of addressing modes, mention the different types

Last Answer : The various formats of specifying the operands are called addressing modes, it is used to access the operands or data. The different types are as follows • Immediate addressing • Register addressing • Direct addressing • Indirect addressing • Implicit addressing

Description : Explain the different instruction formats with examples

Last Answer : The instruction set is grouped into the following formats • One byte instruction MOV C,A • Two byte instruction MVI A,39H • Three byte instruction JMP 2345H

Description : Explain LDA, STA and DAA instructions

Last Answer : LDA copies the data byte into accumulator from the memory location specified by the 16-bit address. STA copies the data byte from theaccumulator in the memory location specified by 16-bit address. DAA changes the contents of the accumulator from binary to 4-bit BCD digits.

Description : Mention the categories of instruction and give two examples for each category

Last Answer : The instructions of 8085 can be categorized into the following five • Data transfer MOV Rd,Rs STA 16-bit • Arithmetic ADD R DCR M • Logical XRI 8-bit RAR • Branching JNZ CALL 16-bit • Machine control HLT NOP

Description : How many machine cycles does 8085 have, mention them

Last Answer : The 8085 have seven machine cycles. They are • Opcode fetch • Memory read • Memory write • I/O read • I/O write • Interrupt acknowledge • Bus idle

Description : What is the use of ALE

Last Answer : The ALE is used to latch the lower order address so that it can be available in T2 and T3 and used for identifying the memory address. During T1 the ALE goes high, the latch is transparent ... is the lower order address. When ALE goes low the lower order address is latched until the next ALE.

Description : What is an instruction?

Last Answer : An instruction is a binary pattern entered through an input device to command the microprocessor to perform that specific function

Description : Define instruction cycle, machine cycle and T-state

Last Answer : Instruction cycle is defined, as the time required completing theexecution of an instruction. Machine cycle is defined as the time required completing one operation of accessing memory, I/O or ... request. Tcycle is defined as one subdivision of the operation performed in one clock period

Description : Basic concepts in memory interfacing

Last Answer : The primary function of memory interfacing is that the microprocessor should be able to read from and write into a given register of a memory chip. To perform these operations the microprocessor ... Be able to select the chip Identify the register Enable the appropriate buffer

Description : How many interrupts does 8085 have, mention them

Last Answer : The 8085 has 5 interrupt signals; they are INTR, RST7.5, RST6.5, RST5.5 and TRAP

Description : Steps involved to fetch a byte in 8085

Last Answer : i. The PC places the 16-bit memory address on the address bus ii. The control unit sends the control signal RD to enable the memory chip iii. The byte from ... byte is placed in the instruction decoder of the microprocessor and the task is carried out according to the instruction

Description : What are operations performed on data in 8085

Last Answer : The various operations performed are • Store 8-bit data • Perform arithmetic and logical operations • Test for conditions • Sequence the execution of instructions • Store data temporarily during execution in the defined R/W memory locations called the stack

Description : What is the signal classification of 8085

Last Answer : All the signals of 8085 can be classified into 6 groups • Address bus • Data bus • Control and status signals • Power supply and frequency signals • Externally initiated signals • Serial I/O ports