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;
}
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();
}
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();
}