[Assembly Help] Hex to BCD conversion

So I have this Assembly project to do, and in it I have to convert a hexadecimal number to the BCD representation. And I honestly have no idea how to do it. So maybe if anyone could help me out and explain the algorithm I need to use, I can figure it out.

Thanks.

Change majors

Change majors

Change majors

I know how to do it outside of Assembly but I don't know how to do it with all the register transfer bull**** and limitations of Assembly.

in case yall were wondering.

What assembly language you using is a good start? MIPS?

ok here:

mov dword ptr [eax], 00000000

LMFAO OK GO

Change majors

mov ax, 0
mov bx, 0
int 16

gogogo

btw that assignment sounds like a pain in the ass, though not really difficult

write a C program that does it, then compile it and look at the assembly listing :p

What assembly language you using is a good start? MIPS?

for a PIC processor. PIC16F84...we are doing like very introductory assembly, because we had some extra time in class and he wanted us to touch on it.

mov ax, 0
mov bx, 0
int 16

gogogo
THAT'S GOOD BUT THIS IS QUICKER

mov ah, 0x4C
int 0x21

THAT'S GOOD BUT THIS IS QUICKER

mov ah, 0x4C
int 0x21
i dunno, i've never actually done x86 assembly. that was just something I remember someone saying ~5 years ago in high school

mov ax, 0
mov bx, 0
int 16

gogogo

btw that assignment sounds like a pain in the ass, though not really difficult

write a C program that does it, then compile it and look at the assembly listing :p


it isn't hard, i have the rest of the project done already...and like i understand the concept here and everything, i just don't know like "shift left twice, then add 2, then shift left again, then blah blah blah" that bull****, so i can put it into code. just need like the general idea to convert it and i can put it into code.

ps assembly is gay but i like it more than c++

hex to bcd is no different than hex to binary, or binary to bcd

i.e.

the first place is 16^0, second place is 16^1, third place is 16^2, just like in binary first place is 2^0, second is, 2^1, etc...

if you can't understand that then switch majors

it isn't hard, i have the rest of the project done already...and like i understand the concept here and everything, i just don't know like "shift left twice, then add 2, then shift left again, then blah blah blah" that bull****, so i can put it into code. just need like the general idea to convert it and i can put it into code.

ps assembly is gay but i like it more than c++

Google is your friend:

http://www.engr.udayton.edu/faculty/jloomis/ece314/notes/devices/binary_to_BCD/bin_to_BCD.html

hex to bcd is no different than hex to binary, or binary to bcd

i.e.

the first place is 16^0, second place is 16^1, third place is 16^2, just like in binary first place is 2^0, second is, 2^1, etc...

if you can't understand that then switch majors

read the thread you stupid ****

Google is your friend:

http://www.engr.udayton.edu/faculty/jloomis/ece314/notes/devices/binary_to_BCD/bin_to_BCD.html


i found that site, it isn't helping me. you can't really check the 10s place or 100s place like that with this assembly, it doesn't have a way to do that.

read the thread you stupid ****




i found that site, it isn't helping me. you can't really check the 10s place or 100s place like that with this assembly, it doesn't have a way to do that.

Use an AND with 0x00000F00 or whatever to isolate whatever field you want, shift it over and compare.

shh fei assembly is very limiting you can't do **** with it :rolleyes:

Use an AND with 0x00000F00 or whatever to isolate whatever field you want, shift it over and compare.


yeah i just got it. thanks.