Advance C programming tutorial

Advance C
programming tutorial

System level programming by c
programming language



In the header file dos.h there are two important
structures and union (Remember this structure)


1. struct BYTEREGS {

unsigned char al, ah, bl, bh;

unsigned char cl, ch, dl, dh;

   };



2. struct WORDREGS
{

unsigned int ax,
bx, cx, dx;

unsigned int si,
di, cflag, flags;

   };



3. union REGS
{

struct