Here we will see how to add two 8-bit numbers without carry in 8085.Problem StatementWrite 8085 Assembly language program to perform 8-bit addition without carry. The numbers are stored at F100, and F101. Result will be stored at F102.DiscussionIn 8085, there is ADD instruction to add two numbers. We will set the HL pair to point the numbers, then load accumulator with the number. Then add with ADD M operation which can add items from memory pointed by HL pair and accumulator.InputAddressData……F100CEF10121…… Flow Diagram ProgramAddressHEX CodesLabelsMnemonicsCommentsF00021, 01, F1 LXI H, F100HPoint to get the numbersF0037E MOV A, MLoad first number to AF00423 INX HPoint to ... Read More

Here we will see how to perform BCD subtractions using 8085.Problem StatementWrite 8085 Assembly language program to perform BCD subtractions of tow numbers stored at location 8001 and 8002. The result will be stored at 8050 and 8051.DiscussionTo subtract two BCD numbers, we are going to use the 10s complement method. Taking the first number and storing into B, Load 99 into A then subtract the number to get the 9’s complement. After that add 1 with the result to get 10’s complement. We cannot increase using INR instruction. This does not effect on CY flag. So we have to ... Read More

Here we will see how to split two nibbles of an 8-bit number.Problem StatementWrite 8085 Assembly language program to split two nibbles of an 8-bit number. Number is stored at F050, we will store result at F051 and F052.DiscussionTo get the nibbles separately, at first we are taking number into B register as a copy. Now mask upper nibble to get lower nibble and store it, then take the number from B again, mask lower nibble to get upper nibble, then rotate it four times to make it lower order nibble, after that store it to another location.InputAddressDataF05035 AddressDataF050BE Flow Diagram ProgramAddressHEX CodesLabelsMnemonicsCommentsF0003A, ... Read More

In this program we will see how to generate table of an integer.Problem StatementWrite 8085 Assembly language program to generate a table of input integer. The number is stored at F050, and the table will be stored at F051 onwards.DiscussionTable generation is basically the multiplication table creation. We are taking the number and storing it to B. And initialize the counter as 0A (10 in decimal). In each step we are adding B with A and store value of A into memory, and decrease the counter by 1. These steps will repeat until the counter become 0.InputAddressData……F0504…… Flow Diagram ProgramAddressHEX CodesLabelsMnemonicsCommentsF00021, 50 ... Read More

Here we will see how to AND two nibbles of an 8-bit number.Problem Statement:Write 8085 Assembly language program to perform AND operation of two nibbles of an 8-bit number. Number is stored at F050, we will store result at F051.DiscussionTo get the nibbles, we have to mask at first. So we need to mask the lower nibble and upper nibble and store them into different registers. The upper nibble will be shifted to the right four bits to make it lower nibble. Then we can perform the AND operation, and store it to the memory location F051.InputAddressDataF05035 AddressDataF050BE Flow Diagram ProgramAddressHEX CodesLabelsMnemonicsCommentsF0003A, 50 ... Read More

Here we will see how to find the place of the set bit of the Accumulator data.Problem StatementWrite 8085 Assembly language program to find the position where the bit is 1. In the accumulator all bits are 0, but only one bit is 1. We have to get the position of the bit which is 1. The position will be displayed in decimal from 1 to 8.DiscussionWe are taking the number like (0010 0000). The place value is 6. So we are rotating the number to the right through carry. If the carry bit is 1, then we break the ... Read More

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 More

In this program we will see how to sort array elements in descending order.Problem StatementWrite 8086 Assembly language program to sort in descending order of the elements in a given array, which is starts from memory offset 501. The size of the series is stored at memory offset 500.DiscussionHere we are sorting the number in bubble sorting technique. In this sorting technique there will be n passes for n different numbers. In ith pass the ith smallest element will be placed at the end. This is comparison based sort. We taking two consecutive numbers, compare them, and then swap them ... Read More

In this program we will see how to reverse an 8-bit number using 8-bit operation.Problem StatementWrite 8086 Assembly language program to reverse an 8-bit number which is stored at location 2000, using 8-bit operations.Discussion8086 has 8-bit operation for rotation. we are taking the byte from 2000. Then rotate that byte with ROL instruction. After that put the number into memory in reverse form.InputAddressData……2000AB…… Flow Diagram ProgramOutputAddressData……2000BA……           

In this program we will see how to reverse a 16-bit number using 8-bit operation.Problem StatementWrite 8086 Assembly language program to reverse a 16-bit number which is stored at location 2000 and 2001, using 8-bit operations.Discussion8086 has 8-bit operation for rotation. For 16-bit number, we are taking the bytes from 2000 and 2001. Then rotate each byte with ROL instruction. After that put the numbers in reverse form to reverse the bytes. Like the content of 2000 will be stored at 2001 after reverse, and content of 2001 will be stored at 2000 after reverse.InputAddressData……2000AB2001CD…… Flow Diagram ProgramOutputAddressData……2000DC2001BA……