# Find the call function of a string

On a 16bit real mode x86 program I can locate a string that is displayed on screen. How do I go about finding all the places this string is called from to trace back the "print" function?

• Have you tried pressing x in IDA when this string is selected? – bart1e Jul 19 at 19:12
• @bart1e no cross references listed for ANY strings. Even ones that I know get displayed. As this in an embeded rom I also cant press c at the reset vector either so a lot of the auto eploring doesnt seem to work. – uMinded Jul 19 at 20:41
• @uMinded When you are analysing dynamically you can try a hardware breakpoint on the string - this won't give "all the places", but probably some interesting starting points – Anonymous Anonymous Jul 20 at 18:27

Try searching for INT 10h, that's the x86 BIOS interrupt that allows you to output text to the screen, as well as change the video mode and cursor position among other things.