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Posted By: kondapalli Member Level: Gold Posted Date: 09 May 2008
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2007 Jawaharlal Nehru Technological University B.Tech Production MICROPROCESSORS AND INTERFACING setno1 Question paper
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1. (a) Explain the difference between Machine Language, Assembly Language and
High Level language.
(b) Explain the requirement of a program counter, stack pointer and status flags
in the architecture of Intel 8085 Micro process. [8+8]
2. (a) Explain register to register and register to / from memory with displacement
instruction formats with the help of examples.
(b) Explain the different type of addressing modes used in 8086. [8+8]
3. (a) Write a program to check whether the given string is palindrome or not.
(b) Briefly explain about following instructions.
i. ADD
ii. NEG
iii. AAM
iv. DIV [8+8]
4. (a) Define a macro for moving an arbitrary character string that ends with an
EOT character from one string of bytes in memory to another?
(b) Discuss the difference in the debug applications of the interrupts caused by
the INT, INT Type, and single-step trap? In particular, which one of these
interrupts is preferred than the remaining two? [8+8]
5. (a) Write an instruction sequence that converts 8-digit packed BCD number to
its equivalent ASCII coded hex number.
(b) Write a program segment that will copy all ASCII characters in string STG
that are enclosed by single quotes to the string MESG and store the number
of characters moved in COUNT? [8+8]
6. Explain the following terms with reference to 8259.
(a) END of interrupt
(b) Automatic rotation
(c) Poll command
(d) Read resister command. [4+4+4+4]
7. What is the difference between simple I/O, strobbed I/O and bi-directional I/O
with reference to 8255? Discuss the required control signals and their timing se-
quence for each mode of operation? [16]
8. (a) Draw the command register and mode register format of 8237 and explain
each bit?
(b) Show how 8237s are cascaded to provide more number of DRQs and explain
the operation?
(c) Explain how memory to memory transfer is performed with 8237? [6+5+5]
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