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8085 Articles
Page 14 of 36
Program to convert two-digit hex to two ASCII values in 8085 Microprocessor
Here we will see a program of Intel 8085 Microprocessor. Using this program, we can convert 8-bit numbers to two digit ASCII values.Problem Statement− Write an 8085 Assembly language program to convert 8-bit binary to 2-character ASCII values. The 8-bit binary number is stored in memory location 8050H. Separate each nibbles and convert it to corresponding ASCII code and store it to the memory location 8060H and 8061H.Discussion−In this problem we are using a subroutine to convert one hexadecimal digit (nibble) to its equivalent ASCII values. As the 8-bit number contains two nibbles, so we can execute this subroutine to find ...
Read MoreProgram to convert ASCII to binary in 8085 Microprocessor
Here we will see one 8085 program, the program will convert ASCII to binary values.Problem Statement− Write an 8085 Assembly level program to convert ASCII to binary or Hexadecimal character equivalent values.Discussion−The ASCII of number 00H is 30H (48D), and ASCII of 09H is 39H (57D). So all other numbers are in the range 30H to 39H. The ASCII value of 0AH is 41H (65D) and ASCII of 0FH is 46H (70D), so all other alphabets (B, C, D, E, F) are in the range 41H to 46H.Here the logic is simple. We will check whether the ASCII value is less ...
Read MoreProgram to alternately display 00 and FF in the data field in 8085 Microprocessor
Here we will see one 8085 microprocessor program. This program will generate 00H and FFH alternatively.Problem Statement − Write an 8085 Assembly language program that can generate 00H and FFH alternatively.Discussion − The 00H and FFH are changed alternatively in each second. So we need one second delay. We have created delay subroutine to generate 1s delay.Note: Here for simplicity we are storing the numbers into memory. To show the numbers, we can use 7 – segment display and other display function for showing it into the display.InputHere we are not providing any input.Flow DiagramProgramAddressHEX CodesLabelsMnemonicsCommentsF000AFLOOPXRA AClear A registerF00132, 50, 80 STA 8050H Store 00H ...
Read MoreComparison of I/O port chips and memory chips in 8085
In this section we will see the basic comparisons between I/O port chips and the memory chips in 8085 microprocessor.Information is also stored in an Input Output port chip similar to a memory chip. Information of 1 byte are stored in an Input Output port chip on the other hand information of few bytes are stored in the Input Output port chips. An example to be cited as only 1 byte of information is stored in Intel 8212 I/O port chip, but 3 bytes of information are stored in Intel 8255 chip. Moreover, a large number of memory locations like ...
Read More8085 program for Binary search
Here we will see how to perform binary search in 8085.Problem Statement:Write 8085 Assembly language program to perform binary search on a set of data stored at location F110 to F119. The key is located at F100.DiscussionTo perform binary search, the array must be sorted. We are taking the lower limit into L and upper limit into H. The array location is stored at DE register pair. The mid is calculated using (H + L)/2. To perform this division, we are just shifting it to the right one time. Then put the mid value into D and check the item ...
Read More8085 program to find bit differences between two binary patterns.
Here we will see how to find the bit differences of two binary patterns using 8085.Problem StatementTwo binary patterns are stored in locations 8030H and 8031H. Load them in registers A and B. Find out the bit positions where bits are differing and put these location numbers at locations starting from 8050H on words. (Bits are differing at those locations where 0 in A and 1 in B)DiscussionTo solve this problem, we are taking the numbers into A and B. Then initialize the C as counter with 08H, and the register L will keep tract the bit position, where A ...
Read More8085 program with a subroutine to add ten packed BCD numbers.
Here we will see how to add ten packed BCD numbers using 8085.Problem StatementA set of ten packed BCD numbers is stored in the memory location starting from 8040H to 8049H.Write a program with a subroutine to add these numbers in BCD. If a carry is generated save it to register B, and adjust it to BCD. The final sum will be less than 9999BCD. Store the sum at locations 8060H and 8061H.Write a second subroutine to unpack the BCD sum stored in registers A and B, and store them in the OutputBuffer memory starting at 8062H. The most significant ...
Read More8085 program to implement the following function (a*b) + (c*d)
Here we will see how to implement mathematical function using 8085.Problem StatementWrite a program to implement the following function (a*b) + (c*d) and store the result in memory locations 8204 and 8205. Perform multiplication by using a subroutine. Here a, b, c and d numbers are stored at memory locations 8200H, 8201H, 8202H and 8203 respectively.DiscussionMultiplication instruction is not present in the 8085. So we have to use subroutine to perform multiplication. In this subroutine, it takes number from memory pointed by HL pair, and return result into DE register pair. After multiplying two parts, the intermediate results are stored, ...
Read More8085 program for hexadecimal counter
Now let us see a program of Intel 8085 Microprocessor. In this program we will see how to simulate the hexadecimal counter.Problem StatementWrite 8085 Assembly language program to simulate hexadecimal counter.DiscussionHexadecimal counters in 8085 is similar to the binary counter. There are two different parts. The main counting part and the delay part. We have to define a delay subroutine to generate delay between each number while counting. We are considering that we have some external display which are connected through IO port, that will display the result in hexadecimal form.InputHere we are not providing any input.Flow Diagram ProgramAddressHEX CodesLabelsMnemonicsCommentsF00006, FF MVI ...
Read More8085 program for pulse waveform
Now let us see a program of Intel 8085 Microprocessor. In this program we will see how to generate pulse waveform.Problem Statement:Write 8085 Assembly language program to generate continuous square wave.DiscussionTo generate square wave with 8085, we will rotate 10101010 (AAH) continuously. We have to send D0 as output. We will mask the accumulator content by 01H. If this is 0, then output will be 0, if it is 1, output will be 1, thus the pulse will be generated.InputNo input is given in this caseFlow Diagram programAddressHEX CodesLabelsMnemonicsComments800016, AA MVI D, AAHLoad 10101010 into D80027AROTATEMOV A, DLoad D to A800307 RLCRotate A ...
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