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C02/x16/include/veralyr.h02
2019-09-28 21:59:58 -04:00

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/*********************************************
* veralyr.h02 - Layer control functions for *
* Commander X16 VERA Chip *
* Requires: x16.h02 *
* stddef.h02 *
* veramem.h02 *
*********************************************/
/* Get Layer Enabled *
* Args: char l - Layer (0/1) *
* Returns: $FF = Layer Enabled *
* $00 = Disabled */
char getenb();
/* Get Horizontal Scroll Offset *
* Args: char l - Layer (0/1) *
* Returns: int d - Horizontal Scroll */
char gethsc();
/* Get Layer Mode *
* Args: char l - Layer (0/1) *
* Returns: char m - Layer Mode */
char getmod();
/* Get Map Base Address *
* Args: char l - Layer (0/1) *
* Returns: char b - Bank *
* int d - Address */
char getmba();
/* Get Map Base Register *
* Args: char l - Layer (0/1) *
* Returns: int d - Map Base */
char getmbs();
//Not Implemented
/* Get Map Size Specifier *
* Args: char l - Layer (0/1) *
* Returns: char w - Map Width *
* char h - Map Height */
char getmsz();
/* Get Tile Base Address *
* Args: char l - Layer (0/1) *
* Returns: char b - Bank *
* int d - Address */
char gettba();
/* Get Tile Base Register *
* Args: char l - Layer (0/1) *
* Returns: int d - Tile Base */
char gettbs();
//Not Implemented
/* Get Tile Size Specifier *
* Args: char l - Layer (0/1) *
* Returns: char s - Tile Size */
char gettsz();
/* Get Vertical Scroll Offset *
* Args: char l - Layer (0/1) *
* Returns: int d - Vertical Scroll */
char getvsc();
/* Convert Map Size to Pixels *
* Args: char s - Map Size Specifier *
* Returns: int p - Size in Pixels */
char mapsiz();
/* Set Layer Enabled *
* Args: char l - Layer (0/1) *
* char e - Enabled */
char setenb();
/* Set Horizontal Scroll Offset *
* Args: char l - Layer (0/1) *
* int d - Horizontal Scroll */
char sethsc();
/* Set Layer Mode *
* Args: char l - Layer (0/1) *
* Returns: char m - Layer Mode */
char setmod();
/* Set Map Base Register *
* Args: char l - Layer (0/1) *
* int d - Map Base */
char setmbs();
/* Set Map Size Specifier *
* Args: char l - Layer (0/1) *
* char s - Map Size */
char setmsz();
/* Set Tile Base Register *
* Args: char l - Layer (0/1) *
* int d - Tile Base */
char settbs();
/* Set Tile Size Specifier *
* Args: char l - Layer (0/1) *
* char s - Tile Size */
char settsz();
/* Convert Tile Size to Pixels *
* Args: char s - Tile Size Specifier *
* Returns: int p - Size in Pixels */
char tilsiz();