VCRF

Data structure inside INTCRF containing the register values to be passed 
in the bios call. 

typedef struct _VCRF {
  ULONG     reg_eax;
  ULONG     reg_ebx;
  ULONG     reg_ecx;
  ULONG     reg_edx;
  ULONG     reg_ebp;
  ULONG     reg_esi;
  ULONG     reg_edi;
  ULONG     reg_ds;
  ULONG     reg_es;
  ULONG     reg_fs;
  ULONG     reg_gs;
  ULONG     reg_cs;
  ULONG     reg_eip;
  ULONG     reg_eflag;
  ULONG     reg_ss;
  ULONG     reg_esp;
} VCRF;