Renus Blog

01/01/2014

A Very Happy New Year to ALL

03/10/2012

Practice Programs Of Assembly Language Part-3
http://renusblog.codemyne.net/renukasblog/Admin/Post.aspx?postid=42

71. Write a program to multiply the numbers 0ech*25 by using the technique of repeated additions?mov a, r0, : add a, jnc here inc r1here: djnz r0,again mov r0,a

03/10/2012

Practice Programs Of Assembly Language Part-2
http://renusblog.codemyne.net/renukasblog/Admin/Post.aspx?postid=41

61. Read and test p1 to see whether it has the value 45h, if it does send 99h t0 p2 otherwise clear p2?mov p1, a,p1cjne a, ,l1mov p2, $l1: mov p2,

03/10/2012

Practice Programs of Assembly Language Part-1
http://renusblog.codemyne.net/renukasblog/Admin/Post.aspx?postid=40

mov a, Xrl a,a

03/10/2012

Embedded Systems Interview Questions Part-4
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40. Write about pop?Pop copies the byte pointed to by stack pointer to the location whose direct address is integrated, and decrements stack pointer by one. Notice that instruction supports only direct addressing mode (pop 50h).

03/10/2012

Embedded Systems Interview Questions part-3
http://renusblog.codemyne.net/renukasblog/Admin/Post.aspx?postid=38

20. About addressing modes?The importance of addressing modes is it helps to reduce the instruction length.It helps to compare the different instruction sets.It helps to make instruction set rich.There are four types of addressing modes.Immediate addressing mode:as the name implies the addressing mo...

03/10/2012

Embedded Systems Interview Questions Part-2
http://renusblog.codemyne.net/renukasblog/Admin/Post.aspx?postid=37

11. What is ASIC?ASIC stands for application specific integrated circuit. It is designed for particular application. Microprocessors are embedded into ASIC chips to implement complex functions.

03/10/2012

Embedded Systems Interview Questions Part-1
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1. What is an embedded system?A special purpose computer system which enables as a sub-system in a larger system. It is designed to perform a specific task. Embedding means dumping software into a hardware, that’s why embedded system is called as combination of software and hardware. Embedded sys...

03/10/2012

Embedded Systems introduction
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Definition:Embedded system is a special purpose computer system, which is designed to perform a specific task. Embedding means dumping software into a hardware, that’s why embedded system is called as combination of software and hardware. Embedded systems are controlled by one or more main processin...

23/08/2012

Structure of assembly language
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An assembly language program consists of, a series of lines of assembly language instructions. An assembly language instruction consists of a mnemonic, optionally followed by one or two operands. The operands are the data items being manipulated, and the mnemonics are commands to the CPU, telling it...

23/08/2012

Introduction to 8051 assembly programming
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CPU works only in binary. It can do so at very high speed. For humans, however, it is quite tedious and slow to deal with 0s and 1s in order to program the computer. A program that consists of 0s and 1s is called machine language. In the early days of the computer, programmers coded programs in mach...

23/08/2012

Assembling and running 8051 program
http://renusblog.codemyne.net/Admin/Post.aspx?postid=6

1.First we use editor to type in a program. Notice that editor must be able to produce an ASCII file. For many assemblers, the file names follow the usual DOS conventions, but the source file has the extension “asm” or “src” depending on which assembler you are using.