ShuriZma
/
fceux
mirror of https://github.com/TASEmulators/fceux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

fixed dragon lair (mapper 4 version) in new ppu

This commit is contained in:
qeed 2009-10-11 01:56:19 +00:00
parent 5a2750d160
commit 5e4aa9b7ad
1 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/ppu.cpp
View File

@ -2137,7 +2137,6 @@ struct BGData {
int framectr=0;
int FCEUX_PPU_Loop(int skip) {
//262 scanlines
if (ppudead)
{
@ -2286,8 +2285,9 @@ int FCEUX_PPU_Loop(int skip) {
//2. is the bg pixel nonzero?
//then, it is spritehit.
if(oam[6] == 0 && pixel != 0)
{
PPU_status |= 0x40;
}
havepixel = true;
//priority handling
@ -2409,14 +2409,18 @@ int FCEUX_PPU_Loop(int skip) {
else
runppu(kFetchTime);
}
if(((PPU[0]&0x38)!=0x18) && s == 2 && SpriteON ) {
//Dragon's Lair (Europe version mapper 4)
//does not set SpriteON in the beginning but it does
//set the bg on so if using the conditional SpriteON the MMC3 counter
//the counter will never count and no IRQs will be fired so use PPUON
if(((PPU[0]&0x38)!=0x18) && s == 2 && PPUON) { //SpriteON ) {
//(The MMC3 scanline counter is based entirely on PPU A12, triggered on rising edges (after the line remains low for a sufficiently long period of time))
//http://nesdevwiki.org/wiki/index.php/Nintendo_MMC3
//test cases for timing: SMB3, Crystalis
//crystalis requires deferring this til somewhere in sprite [1,3]
//kirby requires deferring this til somewhere in sprite [2,5..
if(PPUON && GameHBIRQHook) {
//if (PPUON && GameHBIRQHook) {
if(GameHBIRQHook) {
GameHBIRQHook();
}
}