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how to multiply two number in 8051

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i wrote this code
the output in led is 00001011
why?
it should be 00000010


Code: 
org 0000h
	
	main:	

clr a
mov a,0x02
mov b,0x00
mul ab


	mov p1,a
	
	END
 

the output in led is 00001011
why?
it should be 00000010
Click to expand...
Why 00000010?
Do you mean MOV A, 0x2 or MOV A, #0x2? In the former case, what's the content of the respective registers?
 

ok # mean immediate value to be loaded
what does 0x2 will do?

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when i divide it only tell integer value not floating point after decimal how to get decimal value is it possible in 8051 or suggest other controller?
 

Guess you should spend some time on studying 8051 architecture and instruction set.

0x02 in direct addressing refers to R2, register bank 0. MOV A, 0x2 is the same as MOV A, R2 with Bank 0 selected.

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If you want float calculations with 8051, you'll use a C compiler to generate the machine instructions. It's possible, but no fun due to the limited data and program memory capacity of most 8051 processors.

Why did you choose 8051 in 2017? Why assembly coding?
 

Do you mean MOV A, 0x2 or MOV A, #0x2?
Click to expand...
the connect is not same in both

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Why did you choose 8051 in 2017? Why assembly coding?
Click to expand...
for basic ok then which one to pick?

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can we do decimal floating point in pic or arm?
 

can we do decimal floating point in pic or arm?
Click to expand...
You can do it with any processor that has certain memory capacity for code and data. That's serial terminal output of a 8051 processor. PIC or arm can do as well.
19.3 19.9 18.8 8.4 10.0 -0.26
19.3 19.9 18.8 8.5 10.1 -0.26
19.4 19.9 18.8 8.5 10.1 -0.26
Click to expand...

Here's the code generating it
Code C - [expand]
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printf("%4.1f ",cm_d);
for (i=0;i<=2;i++) 
    printf("%4.1f ",c[i]);
printf("%4.1f ",ts);
printf("%4.2f\n",Stell*244.2e-6);
 
how to make how to build counter in 8051 assembly lang

- - - Updated - - -

what is this code for??
and how to get integration and differential in 8051 and tignomretry function as cos sin etc
 

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