2.9BSD - /usr/include/sys/pdma.h

   1: /*
   2:  *  Structure to describe pseudo-DMA buffer
   3:  *  used by DZ-11 pseudo-DMA routines.
   4:  *  The offsets in the structure are well-known in dzdma (mch.s).
   5:  */
   6: 
   7: struct pdma {
   8:     struct  dzdevice *p_addr;   /* address of controlling device */
   9:     char    *p_mem;         /* start of buffer */
  10:     char    *p_end;         /* end of buffer */
  11:     struct  tty *p_arg;     /* tty structure for this line */
  12: };

Defined struct's

Usage of this include