Пример #1
0
u32 smeSOUND_GetTime(u32 pcm)
{
    Z80_requestBus(1);
    vu8 *pb = (u8*)(Z80_DRV_PARAMS+0x10);
    u8 a=pb[0];
    u8 b=pb[1];
    Z80_releaseBus();
    u32 cr = (u32)a<<8|(u32)b<<16;
    cr -= pcm;
    cr /= 16;
    return cr;
}
Пример #2
0
void YM2612_reset()
{
    u16 i;
    u16 bus_taken;

    bus_taken = Z80_isBusTaken();
    if (!bus_taken)
        Z80_requestBus(1);

    // enable left and right output for all channel
    for(i = 0; i < 3; i++)
    {
        YM2612_writeSafe(0, 0xB4 | i);
        YM2612_writeSafe(1, 0xC0);
        YM2612_writeSafe(2, 0xB4 | i);
        YM2612_writeSafe(3, 0xC0);
    }

    // disable LFO
    YM2612_writeSafe(0, 0x22);
    YM2612_writeSafe(1, 0x00);

    // disable timer & set channel 6 to normal mode
    YM2612_writeSafe(0, 0x27);
    YM2612_writeSafe(1, 0x00);

    // ALL KEY OFF
    YM2612_writeSafe(0, 0x28);
    for (i = 0; i < 3; i++)
    {
        YM2612_writeSafe(1, 0x00 | i);
        YM2612_writeSafe(1, 0x04 | i);
    }

    // disable DAC
    YM2612_writeSafe(0, 0x2B);
    YM2612_writeSafe(1, 0x00);

    if (!bus_taken)
        Z80_releaseBus();
}
Пример #3
0
void titleScreen() {
	snowflake snowflakes[TITLE_SCREEN_SNOWFLAKES];
	SpriteDef sfdefs[TITLE_SCREEN_SNOWFLAKES];
	
	VDP_resetScreen();
	VDP_resetSprites();

	// Load Swirls
	VDP_loadTileData(swirls, TILE_USERINDEX, 20, TRUE);
	VDP_loadTileData(title_screen, TILE_USERINDEX + 20, 15, TRUE);
	VDP_loadTileData(swirl_spr, TILE_USERINDEX + 35, 20, TRUE);
	VDP_setPalette(PAL1, swirl_pal);
	VDP_setPalette(PAL2, sel_pal);
	VDP_setPalette(PAL3, ts_pal);
	
	JOY_init();
	JOY_setEventHandler(titleHandler);
	
	ImageAsset* title = getImage(titlbg);
	VDP_setPalette(PAL0, title->palette);
	VDP_loadTileData(title->tiles, TILE_USERINDEX + 55, (title->xTiles * title->yTiles), TRUE);
	VDP_fillTileMapRectInc(VDP_PLAN_B, TILE_ATTR_FULL(PAL0, PRIORITY_LOW, FALSE, FALSE, TILE_USERINDEX + 55), 0, 0, title->xTiles, title->yTiles);
	MEM_free( title );
	
	VDP_fillTileMapRectInc(VDP_PLAN_A, TILE_ATTR_FULL(PAL3, PRIORITY_LOW, FALSE, FALSE, TILE_USERINDEX + 20), 18, 3, 5, 3);
	VDP_drawText("Mega Swirl",  1, 7);
	VDP_drawText("Testing Demo", 1, 8);
	VDP_drawText(VERSION_STRING, 1, 9);
	
	VDP_drawText("Music from Deflemask by", 1, 11);
	VDP_drawText("Delek", 1, 12);
	
	VDP_drawText("Featuring artwork by", 1, 14);
	VDP_drawText("Radioactivemantaray", 1, 15);
	
	VDP_drawText("- Press Start to Play -", 1, 21);
	VDP_drawText(BUILD_DATE, 1, 24);

	u8 selected_swirl;
	for(int i = 0; i != TITLE_SCREEN_SNOWFLAKES; i++) {
		snowflakes[i].startedAt = 
		snowflakes[i].startDelay =
		snowflakes[i].fallRate =
		snowflakes[i].swirltype =
		0;
		
		sfdefs[i].posx =
		sfdefs[i].posy =
		sfdefs[i].tile_attr =
		sfdefs[i].size =
		sfdefs[i].link =
		0;
		
		selected_swirl = (custrand() % 4);
		snowflakes[i].swirltype = selected_swirl; // Select one of four swirl types
		snowflakes[i].startDelay = ((custrand() % 3000) + 1) / 300; // Select between a 1-10 second delay (300 ticks per second)
		snowflakes[i].startedAt = getTick(); // Time when this snowflake was created 
		snowflakes[i].fallRate = (custrand() % 2) + 1; // Select how fast this snowflake should fall to the bottom of the screen
		sfdefs[i].posx = (custrand() % 320); // Select X position for this swirl
		sfdefs[i].posy = -16; // Start it off screen
		
		sfdefs[i].size = SPRITE_SIZE(2, 2);
		sfdefs[i].tile_attr = TILE_ATTR_FULL(PAL1, PRIORITY_HIGH, FALSE, FALSE, TILE_USERINDEX + 35 + (4 * selected_swirl)); // This will need to be changed as we need tiles arranged for sprites
		if(i != 0) {
			sfdefs[i - 1].link = i;
		}
	}
	VDP_setSpritesDirect(0, sfdefs, TITLE_SCREEN_SNOWFLAKES);

	Z80_loadDriver(Z80_DRIVER_VGM, 1);
	Z80_requestBus(1);
	YM2612_enableDAC();
	Z80_releaseBus();
	SND_startPlay_VGM(muz_title);

	while (waitflag == FALSE) {
		
		for(int i = 0; i != TITLE_SCREEN_SNOWFLAKES; i++) {
			
			if(getTick() - snowflakes[i].startedAt >= snowflakes[i].startDelay) {
				
				if(sfdefs[i].posy != 240) {
					sfdefs[i].posy = sfdefs[i].posy + snowflakes[i].fallRate;
				} else {
					selected_swirl = (custrand() % 4);
					snowflakes[i].startDelay = ((custrand() % 3000) + 1) / 300;
					snowflakes[i].startedAt = getTick();
					snowflakes[i].fallRate = (custrand() % 2) + 1;
					sfdefs[i].posx = (custrand() % 320);
					sfdefs[i].posy = -16;
				}
				
			}
			
			VDP_setSpritesDirect(0, sfdefs, TITLE_SCREEN_SNOWFLAKES);
		}
		
	}

	waitflag = FALSE;

	srand(GET_HVCOUNTER);
	VDP_clearPlan(APLAN, FALSE);
	JOY_setEventHandler(joyHandler);

	ImageAsset* test = getImage(swlspace);
	VDP_setPalette(PAL0, test->palette);
	VDP_loadTileData(test->tiles, TILE_USERINDEX + 55, (test->xTiles * test->yTiles), TRUE);
	VDP_fillTileMapRectInc(VDP_PLAN_B, TILE_ATTR_FULL(PAL0, PRIORITY_LOW, FALSE, FALSE, TILE_USERINDEX + 55), 0, 0, test->xTiles, test->yTiles);
	MEM_free( test );
	
	SND_stopPlay_VGM();
}