struct ppci {
unsigned int data; /* Output register for External bus */
unsigned int led; /* LED register */
unsigned int sw; /* Switch Register */
unsigned int address; /* Transfer address register */
unsigned int length; /* Transfer cout register */
unsigned int mode; /* Mode register */
unsigned int status; /* Status register */
unsigned int dummy; /* dummy */
unsigned int retlen; /* Actual transfer count */
unsigned int fifolen; /* Size of data in FIFO */
};
It reads the information into the buffer starting at
a ppci.