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bsnes/sfc/ppu/counter/counter-inline.hpp

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First version split into asnes and bsnes.
2010-08-09 13:28:56 +00:00
//this should only be called by CPU::PPUcounter::tick();
//keeps track of previous counter positions in history table
Update to 20100809 release. byuu says: This adds some sync.sh improvements to make it handle errors more gracefully. It also updates asnes a good bit. All of the four base processors now have all publicly accessible functions right at the top of the main headers, and everything else is private. This is to allow these headers to essentially take the place of the previous base classes in the old bsnes-merged format. So if there's something public there, you need to implement that exact function to make your own module. I removed the frame counter from the PPU, as it has nothing to do with emulation. That now resides inside the Qt -> SNES interface code. Quite amazing, I was actually saving the frame counter into the save state files before, yuck. Removed some baggage in the System class: it was friending a bunch of long-dead functions and classes. Forgot to re-add the CHEAT_SYSTEM define to info.hpp, so that's been put back.
2010-08-09 13:33:44 +00:00
void PPUcounter::tick() {
First version split into asnes and bsnes.
2010-08-09 13:28:56 +00:00
status.hcounter += 2; //increment by smallest unit of time
if(status.hcounter >= 1360 && status.hcounter == lineclocks()) {
status.hcounter = 0;
vcounter_tick();
}
history.index = (history.index + 1) & 2047;
history.field [history.index] = status.field;
history.vcounter[history.index] = status.vcounter;
history.hcounter[history.index] = status.hcounter;
}
//this should only be called by PPU::PPUcounter::tick(n);
//allows stepping by more than the smallest unit of time
Update to 20100809 release. byuu says: This adds some sync.sh improvements to make it handle errors more gracefully. It also updates asnes a good bit. All of the four base processors now have all publicly accessible functions right at the top of the main headers, and everything else is private. This is to allow these headers to essentially take the place of the previous base classes in the old bsnes-merged format. So if there's something public there, you need to implement that exact function to make your own module. I removed the frame counter from the PPU, as it has nothing to do with emulation. That now resides inside the Qt -> SNES interface code. Quite amazing, I was actually saving the frame counter into the save state files before, yuck. Removed some baggage in the System class: it was friending a bunch of long-dead functions and classes. Forgot to re-add the CHEAT_SYSTEM define to info.hpp, so that's been put back.
2010-08-09 13:33:44 +00:00
void PPUcounter::tick(unsigned clocks) {
First version split into asnes and bsnes.
2010-08-09 13:28:56 +00:00
status.hcounter += clocks;
if(status.hcounter >= lineclocks()) {
status.hcounter -= lineclocks();
vcounter_tick();
}
}
//internal
Update to 20100809 release. byuu says: This adds some sync.sh improvements to make it handle errors more gracefully. It also updates asnes a good bit. All of the four base processors now have all publicly accessible functions right at the top of the main headers, and everything else is private. This is to allow these headers to essentially take the place of the previous base classes in the old bsnes-merged format. So if there's something public there, you need to implement that exact function to make your own module. I removed the frame counter from the PPU, as it has nothing to do with emulation. That now resides inside the Qt -> SNES interface code. Quite amazing, I was actually saving the frame counter into the save state files before, yuck. Removed some baggage in the System class: it was friending a bunch of long-dead functions and classes. Forgot to re-add the CHEAT_SYSTEM define to info.hpp, so that's been put back.
2010-08-09 13:33:44 +00:00
void PPUcounter::vcounter_tick() {
First version split into asnes and bsnes.
2010-08-09 13:28:56 +00:00
if(++status.vcounter == 128) status.interlace = ppu.interlace();
if((system.region() == System::Region::NTSC && status.interlace == false && status.vcounter == 262)
|| (system.region() == System::Region::NTSC && status.interlace == true && status.vcounter == 263)
|| (system.region() == System::Region::NTSC && status.interlace == true && status.vcounter == 262 && status.field == 1)
|| (system.region() == System::Region::PAL && status.interlace == false && status.vcounter == 312)
|| (system.region() == System::Region::PAL && status.interlace == true && status.vcounter == 313)
|| (system.region() == System::Region::PAL && status.interlace == true && status.vcounter == 312 && status.field == 1)
) {
status.vcounter = 0;
status.field = !status.field;
}
if(scanline) scanline();
}
Update to 20100809 release. byuu says: This adds some sync.sh improvements to make it handle errors more gracefully. It also updates asnes a good bit. All of the four base processors now have all publicly accessible functions right at the top of the main headers, and everything else is private. This is to allow these headers to essentially take the place of the previous base classes in the old bsnes-merged format. So if there's something public there, you need to implement that exact function to make your own module. I removed the frame counter from the PPU, as it has nothing to do with emulation. That now resides inside the Qt -> SNES interface code. Quite amazing, I was actually saving the frame counter into the save state files before, yuck. Removed some baggage in the System class: it was friending a bunch of long-dead functions and classes. Forgot to re-add the CHEAT_SYSTEM define to info.hpp, so that's been put back.
2010-08-09 13:33:44 +00:00
bool PPUcounter::field () const { return status.field; }
uint16 PPUcounter::vcounter() const { return status.vcounter; }
uint16 PPUcounter::hcounter() const { return status.hcounter; }
First version split into asnes and bsnes.
2010-08-09 13:28:56 +00:00
Update to 20100809 release. byuu says: This adds some sync.sh improvements to make it handle errors more gracefully. It also updates asnes a good bit. All of the four base processors now have all publicly accessible functions right at the top of the main headers, and everything else is private. This is to allow these headers to essentially take the place of the previous base classes in the old bsnes-merged format. So if there's something public there, you need to implement that exact function to make your own module. I removed the frame counter from the PPU, as it has nothing to do with emulation. That now resides inside the Qt -> SNES interface code. Quite amazing, I was actually saving the frame counter into the save state files before, yuck. Removed some baggage in the System class: it was friending a bunch of long-dead functions and classes. Forgot to re-add the CHEAT_SYSTEM define to info.hpp, so that's been put back.
2010-08-09 13:33:44 +00:00
bool PPUcounter::field (unsigned offset) const { return history.field [(history.index - (offset >> 1)) & 2047]; }
uint16 PPUcounter::vcounter(unsigned offset) const { return history.vcounter[(history.index - (offset >> 1)) & 2047]; }
uint16 PPUcounter::hcounter(unsigned offset) const { return history.hcounter[(history.index - (offset >> 1)) & 2047]; }
First version split into asnes and bsnes.
2010-08-09 13:28:56 +00:00
//one PPU dot = 4 CPU clocks
//
//PPU dots 323 and 327 are 6 CPU clocks long.
//this does not apply to NTSC non-interlace scanline 240 on odd fields. this is
//because the PPU skips one dot to alter the color burst phase of the video signal.
//
//dot 323 range = { 1292, 1294, 1296 }
//dot 327 range = { 1310, 1312, 1314 }
Update to 20100809 release. byuu says: This adds some sync.sh improvements to make it handle errors more gracefully. It also updates asnes a good bit. All of the four base processors now have all publicly accessible functions right at the top of the main headers, and everything else is private. This is to allow these headers to essentially take the place of the previous base classes in the old bsnes-merged format. So if there's something public there, you need to implement that exact function to make your own module. I removed the frame counter from the PPU, as it has nothing to do with emulation. That now resides inside the Qt -> SNES interface code. Quite amazing, I was actually saving the frame counter into the save state files before, yuck. Removed some baggage in the System class: it was friending a bunch of long-dead functions and classes. Forgot to re-add the CHEAT_SYSTEM define to info.hpp, so that's been put back.
2010-08-09 13:33:44 +00:00
uint16 PPUcounter::hdot() const {
First version split into asnes and bsnes.
2010-08-09 13:28:56 +00:00
if(system.region() == System::Region::NTSC && status.interlace == false && vcounter() == 240 && field() == 1) {
return (hcounter() >> 2);
} else {
return (hcounter() - ((hcounter() > 1292) << 1) - ((hcounter() > 1310) << 1)) >> 2;
}
}
Update to 20100809 release. byuu says: This adds some sync.sh improvements to make it handle errors more gracefully. It also updates asnes a good bit. All of the four base processors now have all publicly accessible functions right at the top of the main headers, and everything else is private. This is to allow these headers to essentially take the place of the previous base classes in the old bsnes-merged format. So if there's something public there, you need to implement that exact function to make your own module. I removed the frame counter from the PPU, as it has nothing to do with emulation. That now resides inside the Qt -> SNES interface code. Quite amazing, I was actually saving the frame counter into the save state files before, yuck. Removed some baggage in the System class: it was friending a bunch of long-dead functions and classes. Forgot to re-add the CHEAT_SYSTEM define to info.hpp, so that's been put back.
2010-08-09 13:33:44 +00:00
uint16 PPUcounter::lineclocks() const {
First version split into asnes and bsnes.
2010-08-09 13:28:56 +00:00
if(system.region() == System::Region::NTSC && status.interlace == false && vcounter() == 240 && field() == 1) return 1360;
return 1364;
}
Update to 20100809 release. byuu says: This adds some sync.sh improvements to make it handle errors more gracefully. It also updates asnes a good bit. All of the four base processors now have all publicly accessible functions right at the top of the main headers, and everything else is private. This is to allow these headers to essentially take the place of the previous base classes in the old bsnes-merged format. So if there's something public there, you need to implement that exact function to make your own module. I removed the frame counter from the PPU, as it has nothing to do with emulation. That now resides inside the Qt -> SNES interface code. Quite amazing, I was actually saving the frame counter into the save state files before, yuck. Removed some baggage in the System class: it was friending a bunch of long-dead functions and classes. Forgot to re-add the CHEAT_SYSTEM define to info.hpp, so that's been put back.
2010-08-09 13:33:44 +00:00
void PPUcounter::reset() {
First version split into asnes and bsnes.
2010-08-09 13:28:56 +00:00
status.interlace = false;
status.field = 0;
status.vcounter = 0;
status.hcounter = 0;
history.index = 0;
for(unsigned i = 0; i < 2048; i++) {
history.field [i] = 0;
history.vcounter[i] = 0;
history.hcounter[i] = 0;
}
}