mirror of
https://github.com/bsnes-emu/bsnes.git
synced 2025-10-04 07:01:32 +02:00
bb4db22a7d
byuu says: (r05 and r06 were save points between large core modifications) I would really appreciate extensive regression testing (especially around SuperFX, Cx4, ST018, DSP-n, ST-01n, NES, GB) at this point. The most critical core changes should be completed now. And it was an unbelievable amount of restructuring. Changelog: - SuperFX core moved to Processor::GSU - SNES::CPU core moved to Processor::R65816 - SNES::SMP core moved to Processor::SPC700 - NES::CPU core renamed to Processor::R6502 - use filestream to load RAM files from interface - save states store SHA256 instead of CRC32 (CRC32 usage removed entirely from bsnes) - nes/ -> fc/ and NES -> FC - snes/ -> sfc/ and SNES -> SFC - SuperFamicom::MappedRAM::copy uses stream instead of data+size - Linux port uses gcc-4.7 (still using only gcc-4.6 subset, so you can make a gcc-4.6 symlink for now if you like.) - all profiles and all targets compile and work properly All eight instruction set cores have been moved to processor/ now. Consistency's a wonderful thing. The last remnants of NES/SNES are now limited to target-ui code; and the nall/(system) folder names. I'm building with gcc-4.7 on my Linux box now because the resultant binaries are up to 20% faster (seriously) than gcc-4.6.
58 lines
1.1 KiB
C++
Executable File
58 lines
1.1 KiB
C++
Executable File
void APU::Noise::clock_length() {
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if(envelope.loop_mode == 0) {
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if(length_counter > 0) length_counter--;
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}
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}
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uint8 APU::Noise::clock() {
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if(length_counter == 0) return 0;
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uint8 result = (lfsr & 1) ? envelope.volume() : 0;
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if(--period_counter == 0) {
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unsigned feedback;
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if(short_mode) {
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feedback = ((lfsr >> 0) & 1) ^ ((lfsr >> 6) & 1);
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} else {
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feedback = ((lfsr >> 0) & 1) ^ ((lfsr >> 1) & 1);
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}
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lfsr = (lfsr >> 1) | (feedback << 14);
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period_counter = apu.ntsc_noise_period_table[period];
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}
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return result;
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}
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void APU::Noise::power() {
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}
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void APU::Noise::reset() {
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length_counter = 0;
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envelope.speed = 0;
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envelope.use_speed_as_volume = 0;
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envelope.loop_mode = 0;
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envelope.reload_decay = 0;
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envelope.decay_counter = 0;
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envelope.decay_volume = 0;
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period = 0;
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period_counter = 1;
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short_mode = 0;
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lfsr = 1;
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}
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void APU::Noise::serialize(serializer &s) {
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s.integer(length_counter);
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envelope.serialize(s);
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s.integer(period);
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s.integer(period_counter);
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s.integer(short_mode);
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s.integer(lfsr);
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}
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