C02/x16/include/veramem.h02

/*********************************************
 * veramem.h02 - Memory Access Functions for *
 *               Commander X16 VERA Chip     *
 *                                           *
 * Requires: x16.h02                         *
 *           stddef.h02                      *
 *********************************************/


/* Check Vera Memory Address               *
 * Args: char opts - Bank | Auto-Increment *
 *        int addr - Address               *
 * Returns: char valid - #TRUE or #FALSE   */
char chkadr();

/* Clear Vera Memory              *
 * Args: char n - Number of Bytes *
 * Requires: setadr(bank,addr)    */
char clrmem();

/* Fill Vera Memory               *
 * Args: char b - Byte to Write   *
 *       char n - Number of Bytes *
 * Requires: setadr(bank,addr)    */
char filmem();

/* Get Vera Memory Address                 *
 * Returns: char bank - Address Bits 16-19 *
 *           int addr - Address Bits 0-15  */
char getadr();

/* Read Byte from Vera Memory             *
 * Args: char bank - Address Bits 16-19   *
 *        int addr - Address Bits 0-15    *
 * Returns: char byte - Contents of Memory */
char getbyt();

/* Read Integer from Vera Memory          *
 * Args: char bank - Address Bits 16-19   *
 *        int addr - Address Bits 0-15    *
 * Returns: int byte - Contents of Memory */
char getint();

/* Read from Vera Memory into Array        *
 * Args: char n - Number of Bytes      *
 *        int d - Address of Array     *
 * Requires: setadr(bank,addr)         *
 * Returns: char count - Bytes Written */
char getmem();

/* Set Address to Internal Register  *
 * Args: int addr - Register Address *
char regadr();

/* Set Vera Address with Auto-Increment *
 * Args: char opts - Bank               *
 *        int addr - Address            *
char setadi();

/* Set Vera Memory Address                 *
 * Args: char opts - Bank | Auto-Increment *
 *        int addr - Address               *
char setadr();

/* Write Byte to Vera Memory       *
 * Args: char byte - Byte to Write *
 * Requires: setadr(bank,addr)     */
char setbyt();

/* Write Integer to Vera Memory      *
 * Args: int word - Integer to Write *
 * Requires: setadr(bank,addr)       */
char setint();

/* Write from Array to Vera Memory     *
 * Args: char n - Number of Bytes      *
 *        int d - Address of Array     *
 * Requires: setadr(bank,addr)         *
 * Returns: char count - Bytes Written */
char setmem();