8085 program to separate (or split) a byte into two nibbles
Here we will see how to split two nibbles of an 8-bit number.
Problem Statement
Write 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.
Discussion
To 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.
Input
Flow Diagram
Program
Address
| HEX Codes
| Labels
| Mnemonics
| Comments
|
|---|
F000
| 3A, 50 F0
|
| LDA F050
| Take the number from memory to Accumulator
|
F003
| 47
|
| MOV B,A
| Store the number Acc to B
|
F004
| E6, 0F
|
| ANI 0F
| AND Acc with 0F to get lower nibble
|
F006
| 32, 52, F0
|
| STA F052
| Store lower nibble to memory
|
F009
| 78
|
| MOV A,B
| Load main number from B to A
|
F00A
| E6, F0
|
| ANI F0
| AND Acc and F0 to get upper nibble
|
F00C
| 07
|
| RLC
| Rotate Acc to left
|
F00D
| 07
|
| RLC
| Rotate Acc to left
|
F00E
| 07
|
| RLC
| Rotate Acc to left
|
F00F
| 07
|
| RLC
| Rotate Acc to left
|
F010
| 32, 51, F0
|
| STA F051
| Store upper nibble at F051
|
F013
| 76
|
| HLT
| Terminate the program
|
Output
Published on 17-Jun-2019 08:45:31
