/******************************************
 * block - Block Memory Functions for C02 *
 ******************************************/

/* Set Block Start Address  *
 * Args: &b - Start Address */
void blkbgn();

/* Set Destination Pointer to Block Start */
void blkdst();

/* Set Block End Address  *
 * Args: &b - End Address */
void blkend();

/* Read Bytes from Block                     * 
 * Args: n  - Number of bytes to read        *
 *       &m - Array containing bytes to read *
 * Returns: A=$FF if bytes were read         *
 *            $00 if block was overflowed    */
char blkget();

/* Search Block for Array Contents                 *
 * Args: n  - Search segment size                  *
 *       &m - Array containing bytes to search for *
 * Returns: A=$FF if found                         *
 *            $00 if not found                     */
char blkmem();

/* Move Block Pointer to Next Segment   *
 * Returns: A=$FF if successful         *
 *            $00 if there was an error */
void blknxt();

/* Set Block Pointer Address            * 
 * Args: &d - Address to Set Pointer to */
char blkptr();

/* Move Block Pointer to Previous Segment *
 * Returns: A=$FF if successful           *
 *            $00 if there was an error   */
void blkprv();

/* Write Bytes to Block                       * 
 * Args: n  - Number of bytes to write        *
 *       &m - Array containing bytes to write *
 * Returns: A=$FF if bytes were written       *
 *            $00 if block was overflowed     */
char blkput();

/* Set Block Pointer to Block Start */
void blkrst();

/* Set Block Segment Length          *
 * Args: n - Length of block segment *
 * Returns: Fill character           */
char blkseg();

/* Fill Block with Character              *
 * Args: c - Character to fill block with *
 * Returns: Fill character                */
char blkset();

/* Sort Segments in Block              *
 * Args: &m - Temporary storage array  */
char blksrt();

/* Search Block for String                         *
 * Args: n  - Search segment size                  *
 *       &m - Array containing bytes to search for *
 * Returns: A=$FF if found                         *
 *            $00 if not found                     */
char blkstr();

/* Swap Bytes in Array with Block Segment    *
 * Args: n  - Search segment size            *
 *       &m - Array containing bytes to swap */
char blkswp();