C02/x16/include/veramem.h02

/*********************************************
 * veramem.h02 - Memory Access Functions for *
 *               Commander X16 VERA Chip     *
 *********************************************/

/* 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 opts - Bank | Auto-Increment *
 *        int addr - Address Bits 0-15     *
 * Returns: char count - Bytes Written     */
char getmem();

/* Read Vera Internal Register Pair       *
 * Args: int addr - Register Address      *
 * Returns: char byte - Register LSB      *
 *           int word - Register Contents */
char getrei();

/* 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: int word - Integer to Write   *
 * Requires: setadr(bank,addr)         *
 * Returns: char count - Bytes Written */
char setmem();