hi guys, I just wanna learn how to convert from ASCII character to the value e.g. input X then the output is 10 etc.

1. Online Hex Converter
2. Arm Instruction To Hex
3. Arm Asm To Hex Converter Calculator

anyone know please help

1. Integer to ASCII Conversion in Assembly I wrote this code to demonstrate how to convert a binary number into ASCII digits for display on the screen. This is a complete program that has been tested on a real TI-99/4A computer.
2. Converting very simple ARM instructions to binary/hex. But none I have been able to find actually walk through how to convert an ARM instruction in to the binary.
3. Asm to Hex conversion? 2003/02/28 00:09:13 0 It is not the point of re-inventing the wheel, it is just that with my software I am not supposed to distribute any kind of third party software (such as mplink.exe or mpasm.exe).
4. May 03, 2006  I looking for a file to convert from asm to hex file so I can load to the eeprom programmer. Right now I use the A51 with emp20 but I want to use the Willem Universal programmer.Because the Willem Programmer just take hex, bin.other than.asm.

thanks :lol:

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Sep 19, 2017  Download ARM Converter for free. For converting ARM ASM Insctruction to Hexadecimal. This application is very useful to perform reverse engineering, this application uses Linux binaries based command line provided and made by Cygwin.

hi guys, I just wanna learn how to convert from ASCII character to the value e.g. input X then the output is 10 etc.

anyone know please help

thanks :lol:

xor ah,ah
int 16h ;read in ascii character ( in range '0' - '9' ) into al
sub al, 48 ;convert ascii character to integer in range 0-9

I am trying to figure out how to convert a 32 bit integer into its hex representation. I know that I need to separate the last 4 bits, use a switch case to find which hex character it corresponds to. And then I need to repeat this for each of the 4 bits. I am struggling to find out how to get each of the 4 bits from LSB to MSB. Can anyone help? Thanks!

1 Answer

Masking and shifting, as suggested in the comments and in your answer, will get you the individual nibbles (half-bytes) that make up the word. But to print the number using putchar or equivalent, you'll need to convert these nibbles to ASCII characters. You don't need a 'switch-case' for this (or rather its equivalent in assembly language, a 'jump table'). You could use a lookup table, given that there will only be 16 entries, or you could conditionally add to the nibble to form a character.

The ASCII digits 0-9 have character codes 48-57. The uppercase letters have character codes starting at 65 for A (the lowercase letters start from 97) and of course 0xA represents the decimal value 10. So you can turn a nibble into a hex string by adding 55 to it if its value is 10 or more, and 48 otherwise. (Equivalently, add 48 unconditionally and add a further 7 to it if the resulting value is 58 or more.)

Note also that shifting right, as you suggest in your answer, will extract digits starting with the least-significant nibble, which is not what you want.

Online Hex Converter

The following is untested and written off the top of my head, so no warranty, but it might set you on the right track:

Arm Instruction To Hex

Arm Asm To Hex Converter Calculator