/****************************************************
 * pointer - Pointer Manipulation Functions for C02 *
 ****************************************************/

/* Set Pointer Address                 *
 * Args: &a - Address                  */
void ptrset();

/* Write byte to pointer address *
 * and increment pointer         *
 * Args: b - Byte to write       * /
void ptrput();

/* Read byte from pointer address  *
 * and increment pointer           *
 * Returns: Byte read from pointer */
char ptrget();

/* Increment Pointer */
void ptrinc();

/* Decrement Pointer */
void ptrdec();

/* Add Offset to Pointer            *
 * Args: n - Number of bytes to add * /
void ptradd();

/* Subtract Offset from Pointer          *
 * Args: n - Number of bytes to subtract * /
void ptrsub();

/* Compare Pointer to Address            *
 * Args: &a - Address to compare against *
 * Returns: Result of comparison         *
 *          -1 = Pointer < Address       *
 *           0 = Pointer = Address       *
 *           1 = Pointer > Address       */
void ptrcmp();

/* Save Pointer Value                    *
 * Args: &a - Address to save pointer to */
void ptrsav();

/* Restore Pointer Value                      *
 * Args: &a - Address to restore pointer from */
void ptrrst();