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add a byte number from one memory location to a byte from subsequent memory location and put sum in the third memory location also save carry flag in
application using shift operationsrotate and shift instructions are helpful even for division andmultiplication these operations are not normally
q find the average of two valuesfind the average of two values which are stored in memory locations named first and second and puts result in
q program for interchanging the values of two memory locationsprogram for interchanging the values of two memory locations input two memory
data transfertwo most fundamental data transfer instructions in 8086 microprocessor are xchg and mov lets give illustrations of the use of these
preparation of writing the program 1 write an algorithm for your program closer to assembly language for instance the algorithm for preceding
data segment num1 db 15h first number num2
q illustration of equivalent exe programan illustration of equivalent exe program for com program is abstract this program adds 2 8-bit numbers in
q define about exe programsan exe program is stored on disk with extension exe exe programs are longer than com programs as every exe program is
cseg segment assume cscseg dscseg sscseg org 100hstartmov ax cseg initialise data segment mov ds ax register using ax mov al num1 take
q define com programsa com command program is binary image of a machine language program it is loaded in memory at the lowest available segment
q explain types of assembly programsassembly language programs can be written in two manners com program having all segments as part of one segment
q show a string in assembly languagemov ah 09hmov dx offset buffint 21hhere data in input buffer stored in data segment is
displaying a number supposing that two digit number 59 is stored as number 5 in bh and number 9 in bl to convert them to equivalent ascii we will add
q example to show a single digit displaying a single digit 0 to 9presume that a value 5 is stored in bl register then to output bl as ascii value add
q illustration of display on video monitordisplaying a single character display contents of bl register presume that it has a single charactermov ah
code segment set ds registermov ax data boiler plate code to set the ds register so that themov ds
q example of input a single digitinput a single digit for example 01 2 3 4 5 6 7 8 9 code segment read a single digit in bl register with
i input a single ascii character into bl register without echo on screen code segment mov ah 08h function
int 21h supports about 100 different functions a function is recognised by putting the function number in ah register for illustration if we want to
q explain keyboard input and video output a keystroke read from keyboard is termed as a console input and a character displayed on the video screen
q explain processing of an interruptthe interrupt is processed asstep 1number field in int instruction is multiplied by 4 to get its entry in
q input output in assembly programsoftware interrupt is a call to an interrupt servicing program situated in the operating system generally the
defining types of data the subsequent format is used for defining data definition format for data definition name
q define stack segment 8086 microprocessor supports word stack stack segment parameters tell the assembler to alert linker that this segment