8085 is a Microprocessor which was developed by Intel in 1970s. All the instructions in this microprocessor are encoded in a single byte. Some of the instructions are followed by one or two bytes of data, which can be a memory address, an immediate operand or a port number.
In this post, we will write a program in 8085 to multiply two 8-bit numbers without using shifting multiplicand.
Algorithm
Start Read multiplier Read multiplicand Extend multiplicand to double(16-bit) prod <- 0 count <- 8 Left shift product Left shift multiplier If CS != 1 go to 11 prod <- prod + multiplicand count <- count - 1 If count != 0 go to 7 Store prod Stop
Flow Chart
Program
LHLD 2100H
MOV A, L
MOV E, H
MVI D, 00H
LXI H, 0000H
MVI C, 08H
BACK: DAD H
RAL
JNC NEXT
DAD D
NEXT: DCR C
JNZ BACK
SHLD 2102H
RST-5
Example
2100H: 02 2101H: 03 2102H: 06 -> Output
Check out our other 8085 programs
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- Program to convert binary number to decimal
- Program to convert binary number to decimal without using DAA
- Program to convert decimal to binary
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