Hello everyone, today I wanted to post a few simple, but useful, Realmode BIOS functions. The functions go as the following: printf- SI = text(NULL terminated), cmpstr(not case sensitive)- DI = buffer SI = text to compare to(caps), getinput-DI = buffer CL = number of characters to take.

pusha/popa = 80286+

I belive that byte operations are slower than native word ones. Even if i need only byte, i store word.


why you assume ah is not destroyed? Correct me if im wrong.



you should also load segment registers, in real mode pointer is segment:offset, keep in mind.


8086 also has movs (strncpy/memcpy)/cmps (strncmp)/scas (strnlen). I dont read all you code but, so i dont know if those instructions are appropiate for it.