mirror of
https://github.com/bsnes-emu/bsnes.git
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47d4bd4d81
byuu says: Changelog: - restructured the project and removed a whole bunch of old/dead directives from higan/GNUmakefile - huge amounts of work on hiro/cocoa (compiles but ~70% of the functionality is commented out) - fixed a masking error in my ARM CPU disassembler [Lioncash] - SFC: decided to change board cic=(411,413) back to board region=(ntsc,pal) ... the former was too obtuse If you rename Boolean (it's a problem with an include from ruby, not from hiro) and disable all the ruby drivers, you can compile an OS X binary, but obviously it's not going to do anything. It's a boring WIP, I just wanted to push out the project structure change now at the start of this WIP cycle.
54 lines
1.0 KiB
C++
54 lines
1.0 KiB
C++
auto APU::Sweep::check_period() -> bool {
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if(pulse_period > 0x7ff) return false;
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if(decrement == 0) {
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if((pulse_period + (pulse_period >> shift)) & 0x800) return false;
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}
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return true;
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}
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auto APU::Sweep::clock(uint channel) -> void {
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if(--counter == 0) {
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counter = period + 1;
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if(enable && shift && pulse_period > 8) {
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int delta = pulse_period >> shift;
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if(decrement) {
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pulse_period -= delta;
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if(channel == 0) pulse_period--;
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} else if((pulse_period + delta) < 0x800) {
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pulse_period += delta;
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}
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}
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}
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if(reload) {
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reload = false;
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counter = period + 1;
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}
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}
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auto APU::Sweep::power() -> void {
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shift = 0;
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decrement = 0;
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period = 0;
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counter = 1;
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enable = 0;
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reload = 0;
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pulse_period = 0;
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}
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auto APU::Sweep::reset() -> void {
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}
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auto APU::Sweep::serialize(serializer& s) -> void {
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s.integer(shift);
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s.integer(decrement);
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s.integer(period);
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s.integer(counter);
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s.integer(enable);
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s.integer(reload);
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s.integer(pulse_period);
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}
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