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bsnes/higan/gb/apu/master/master.cpp

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Update to v095r08 release. byuu says: Changelog: - added preliminary WASAPI driver (it's really terrible, though. Patches most welcome.) - all of processor/ updated to auto fn() -> ret syntax - all of gb/ updated to auto fn() -> ret syntax If you want to test the WASAPI driver, then edit ui-tomoko/GNUmakefile, and replace audio.xaudio2 with audio.wasapi Note that the two drivers are incompatible and cannot co-exist (yet. We can probably make it work in the future.) All that's left for the auto fn() -> ret syntax is the NES core and the balanced/performance SNES components. This is kind of a big deal because this syntax change causes diffs between WIPs to go crazy. So the sooner we get this done and out of the way, the better. It's also nice from a consistency standpoint, of course.
2015-11-21 07:36:48 +00:00
auto APU::Master::run() -> void {
Update to v075r06 release. byuu says: Removed the floating-point volume adjustments from the wave channel and the left/right speaker mixers. Also, against my better judgment I'm backing out of left/right computation when they are both turned off. This basically makes non-stereo games run faster, but will make stereo games appear to run slower. I don't like it when end-users experience mystery slowdowns. Anyway, it appears that the audio calculation is really fucking demanding. Knocks FPS from 800 down to 300. I thought it might be libco, so I took it out and it only went up to 305fps o.O There is also some sort of problem with bsnes/Super Game Boy audio. The latency is really great when you first start, but it seems to drift apart over time until it is well over 500ms, and then it either pops or fades back to very low, sub-50ms latency again. The way I handle mixing is that the coprocessor audio samples go into a resampler to the native SNES rate, and fed to an output buffer. SNES audio samples go there untouched. When there is a sample in each, I add them together and average the result (I still don't understand why we divide by two since these are signed integers), and output it immediately. It's just-in-time sampling, so as long as DSP v Coprocessor do not drift very far, it should have very low latency. And I make the CPU sync DSP and Coprocessor once per scanline, which is something like 15 samples or so.
2011-02-03 11:17:35 +00:00
if(enable == false) {
center = 0;
left = 0;
right = 0;
Update to v093r08 release. byuu says: Changelog: - Game Boy and Game Boy Color now have a weak hipass filter to remove DC bias (or whatever) - Game Boy and Game Boy Color now have cycle-based PPU renderers instead of scanline-based renderers - improved Game Boy color emulation palette contrast - fixed GTK+ ListView selection bug - fixed a typo when saving states (should say "Saved to slot N", not "Save to slot N")
2013-12-11 11:19:17 +00:00
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
centerBias = leftBias = rightBias = 0;
Update to v075r06 release. byuu says: Removed the floating-point volume adjustments from the wave channel and the left/right speaker mixers. Also, against my better judgment I'm backing out of left/right computation when they are both turned off. This basically makes non-stereo games run faster, but will make stereo games appear to run slower. I don't like it when end-users experience mystery slowdowns. Anyway, it appears that the audio calculation is really fucking demanding. Knocks FPS from 800 down to 300. I thought it might be libco, so I took it out and it only went up to 305fps o.O There is also some sort of problem with bsnes/Super Game Boy audio. The latency is really great when you first start, but it seems to drift apart over time until it is well over 500ms, and then it either pops or fades back to very low, sub-50ms latency again. The way I handle mixing is that the coprocessor audio samples go into a resampler to the native SNES rate, and fed to an output buffer. SNES audio samples go there untouched. When there is a sample in each, I add them together and average the result (I still don't understand why we divide by two since these are signed integers), and output it immediately. It's just-in-time sampling, so as long as DSP v Coprocessor do not drift very far, it should have very low latency. And I make the CPU sync DSP and Coprocessor once per scanline, which is something like 15 samples or so.
2011-02-03 11:17:35 +00:00
return;
}
Update to v095r08 release. byuu says: Changelog: - added preliminary WASAPI driver (it's really terrible, though. Patches most welcome.) - all of processor/ updated to auto fn() -> ret syntax - all of gb/ updated to auto fn() -> ret syntax If you want to test the WASAPI driver, then edit ui-tomoko/GNUmakefile, and replace audio.xaudio2 with audio.wasapi Note that the two drivers are incompatible and cannot co-exist (yet. We can probably make it work in the future.) All that's left for the auto fn() -> ret syntax is the NES core and the balanced/performance SNES components. This is kind of a big deal because this syntax change causes diffs between WIPs to go crazy. So the sooner we get this done and out of the way, the better. It's also nice from a consistency standpoint, of course.
2015-11-21 07:36:48 +00:00
int sample = 0;
Update to v075r05 release. byuu says: Added Game Boy sound emulation, all four channels. It's really, really, really bad. Plenty of bugs, I don't even know what the fuck a high-pass filter is so that isn't there. Hermite resampling from 4MHz down to 44KHz. But it's tolerable. I don't understand what sweep is for at all, and I'm sure I have that insane recursive reload behavior wrong. This is pretty much my own design. I referenced blargg's gb snd emu, blargg's older gb apu ref, Cydrak's APU core, that lousy gbdev wiki article, the completely and utterly worthless pandocs, and received nothing but bad and wrong information that just wasted my time from But I managed to pull it off. It's also painfully slow, like 250fps on my machine slow. Countless optimizations are possible.
2011-02-02 10:38:28 +00:00
sample += apu.square1.output;
sample += apu.square2.output;
sample += apu.wave.output;
sample += apu.noise.output;
Update to v083r07 release. byuu says: Game Boy: audio should sound a lot better, eg Zelda: DX first opening scene Game Boy Color: now uses cothread Processor::frequency to dynamically clock GB-CPU to 8MHz. Proper OAM DMA and timer speed. Fixes SMT: DC - WB audio. Added the break; statements to phoenix/windows/platform message loop Added audio latency/frequency to config file only
2011-10-28 09:51:43 +00:00
center = (sample * 512) - 16384;
Update to v075r06 release. byuu says: Removed the floating-point volume adjustments from the wave channel and the left/right speaker mixers. Also, against my better judgment I'm backing out of left/right computation when they are both turned off. This basically makes non-stereo games run faster, but will make stereo games appear to run slower. I don't like it when end-users experience mystery slowdowns. Anyway, it appears that the audio calculation is really fucking demanding. Knocks FPS from 800 down to 300. I thought it might be libco, so I took it out and it only went up to 305fps o.O There is also some sort of problem with bsnes/Super Game Boy audio. The latency is really great when you first start, but it seems to drift apart over time until it is well over 500ms, and then it either pops or fades back to very low, sub-50ms latency again. The way I handle mixing is that the coprocessor audio samples go into a resampler to the native SNES rate, and fed to an output buffer. SNES audio samples go there untouched. When there is a sample in each, I add them together and average the result (I still don't understand why we divide by two since these are signed integers), and output it immediately. It's just-in-time sampling, so as long as DSP v Coprocessor do not drift very far, it should have very low latency. And I make the CPU sync DSP and Coprocessor once per scanline, which is something like 15 samples or so.
2011-02-03 11:17:35 +00:00
Update to v075r05 release. byuu says: Added Game Boy sound emulation, all four channels. It's really, really, really bad. Plenty of bugs, I don't even know what the fuck a high-pass filter is so that isn't there. Hermite resampling from 4MHz down to 44KHz. But it's tolerable. I don't understand what sweep is for at all, and I'm sure I have that insane recursive reload behavior wrong. This is pretty much my own design. I referenced blargg's gb snd emu, blargg's older gb apu ref, Cydrak's APU core, that lousy gbdev wiki article, the completely and utterly worthless pandocs, and received nothing but bad and wrong information that just wasted my time from But I managed to pull it off. It's also painfully slow, like 250fps on my machine slow. Countless optimizations are possible.
2011-02-02 10:38:28 +00:00
sample = 0;
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
if(square1.leftEnable) sample += apu.square1.output;
if(square2.leftEnable) sample += apu.square2.output;
if( wave.leftEnable) sample += apu.wave.output;
if( noise.leftEnable) sample += apu.noise.output;
Update to v087r18 release. byuu says: Merged Cydrak's r17c changes: - BG affine mode added - BG bitmap mode added - OBJ affine mode added - fixed IRQ bug in THUMB mode (fixed almost every game) - timers added (broke almost every game, whee.) Cydrak is absolutely amazingly awesome and patient. This really wouldn't be happening without him. Also fixed some things from my end, including greatly improved sprite priorities, and a much better priority sorter. Mr. Driller looks a lot better now.
2012-04-07 08:17:49 +00:00
sample = (sample * 512) - 16384;
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
sample = (sample * (leftVolume + 1)) / 8;
Update to v093r07 release. byuu says: Changelog: - importing a game won't show message box on success - importing a game will select the game that was imported in the list - caveat: GTK+ port doesn't seem to be removing focus from item 0 even though the selection is on item 2 - Game Boy audio reduced in volume by 50% - Game Boy Advance audio reduced in volume by 50% - Game Boy internally mixes audio at 2MHz now - Game Boy Advance's Game Boy audio hardware internally mixes audio at 2MHz now - Game Boy Color doesn't sort sprites by X-coordinate - Game Boy Color allows transparency on BGpriority pixels - caveat: this seems to allow sprites to appear on top of windows - Game Boy Color VRAM DMA transfers 16 bytes in 8 clocks (or 16 clocks in double speed mode) - Game Boy Color VRAM DMA masks low 4-bits of source and destination address - Game Boy Color VRAM DMA only allows reads from ROM or RAM - Game Boy Color VRAM DMA only allows writes to VRAM - fixed a bug in dereferencing a nullptr from pObject::find(), should fix crash when pressing enter key on blank windows - fixed Windows RadioItem selection - Game Boy Advance color emulation code added
2013-12-10 12:12:54 +00:00
left = sample;
Update to v075r04 release. byuu says: Changelog: - hooked up everything necessary for Game Boy sound emulation ... - bgameboy and bsnes/SGB input 4MHz frequency, and output 44.1KHz frequency (produces soft static for now, to verify it is working) - rewrote all of gameboy/apu, it now has a 4MHz worker thread, and separate classes/folders for each channel+master, and serializes So it's basically all I can do without actual emulation code or human-readable documentation/example code.
2011-02-02 10:37:31 +00:00
Update to v075r05 release. byuu says: Added Game Boy sound emulation, all four channels. It's really, really, really bad. Plenty of bugs, I don't even know what the fuck a high-pass filter is so that isn't there. Hermite resampling from 4MHz down to 44KHz. But it's tolerable. I don't understand what sweep is for at all, and I'm sure I have that insane recursive reload behavior wrong. This is pretty much my own design. I referenced blargg's gb snd emu, blargg's older gb apu ref, Cydrak's APU core, that lousy gbdev wiki article, the completely and utterly worthless pandocs, and received nothing but bad and wrong information that just wasted my time from But I managed to pull it off. It's also painfully slow, like 250fps on my machine slow. Countless optimizations are possible.
2011-02-02 10:38:28 +00:00
sample = 0;
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
if(square1.rightEnable) sample += apu.square1.output;
if(square2.rightEnable) sample += apu.square2.output;
if( wave.rightEnable) sample += apu.wave.output;
if( noise.rightEnable) sample += apu.noise.output;
Update to v087r18 release. byuu says: Merged Cydrak's r17c changes: - BG affine mode added - BG bitmap mode added - OBJ affine mode added - fixed IRQ bug in THUMB mode (fixed almost every game) - timers added (broke almost every game, whee.) Cydrak is absolutely amazingly awesome and patient. This really wouldn't be happening without him. Also fixed some things from my end, including greatly improved sprite priorities, and a much better priority sorter. Mr. Driller looks a lot better now.
2012-04-07 08:17:49 +00:00
sample = (sample * 512) - 16384;
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
sample = (sample * (rightVolume + 1)) / 8;
Update to v087r18 release. byuu says: Merged Cydrak's r17c changes: - BG affine mode added - BG bitmap mode added - OBJ affine mode added - fixed IRQ bug in THUMB mode (fixed almost every game) - timers added (broke almost every game, whee.) Cydrak is absolutely amazingly awesome and patient. This really wouldn't be happening without him. Also fixed some things from my end, including greatly improved sprite priorities, and a much better priority sorter. Mr. Driller looks a lot better now.
2012-04-07 08:17:49 +00:00
right = sample;
Update to v093r07 release. byuu says: Changelog: - importing a game won't show message box on success - importing a game will select the game that was imported in the list - caveat: GTK+ port doesn't seem to be removing focus from item 0 even though the selection is on item 2 - Game Boy audio reduced in volume by 50% - Game Boy Advance audio reduced in volume by 50% - Game Boy internally mixes audio at 2MHz now - Game Boy Advance's Game Boy audio hardware internally mixes audio at 2MHz now - Game Boy Color doesn't sort sprites by X-coordinate - Game Boy Color allows transparency on BGpriority pixels - caveat: this seems to allow sprites to appear on top of windows - Game Boy Color VRAM DMA transfers 16 bytes in 8 clocks (or 16 clocks in double speed mode) - Game Boy Color VRAM DMA masks low 4-bits of source and destination address - Game Boy Color VRAM DMA only allows reads from ROM or RAM - Game Boy Color VRAM DMA only allows writes to VRAM - fixed a bug in dereferencing a nullptr from pObject::find(), should fix crash when pressing enter key on blank windows - fixed Windows RadioItem selection - Game Boy Advance color emulation code added
2013-12-10 12:12:54 +00:00
//reduce audio volume
center >>= 1;
left >>= 1;
right >>= 1;
Update to v075r04 release. byuu says: Changelog: - hooked up everything necessary for Game Boy sound emulation ... - bgameboy and bsnes/SGB input 4MHz frequency, and output 44.1KHz frequency (produces soft static for now, to verify it is working) - rewrote all of gameboy/apu, it now has a 4MHz worker thread, and separate classes/folders for each channel+master, and serializes So it's basically all I can do without actual emulation code or human-readable documentation/example code.
2011-02-02 10:37:31 +00:00
}
Update to v096r04 release. byuu says: Changelog: - fixed S-DD1 RAM writes (Star Ocean audio fixed) - applied all of the DMG test ROM fixes discussed earlier; passes many more test ROMs now - at least until the GBVideoPlayer is working: for debugging purposes, CPU/PPU single-step now instead of sync just-in-time (~30% slower) - fixed OS X crash on NSTextView (hopefully, would be very odd if not) Unfortunately passing these test ROMs caused my favorite GB/GBC game to break all of its graphics =( Shin Megami Tensei - Devichil - Kuro no Sho (Japan) is all garbled now. I'm really quite bummed by this ... but I guess I'll go through and revert r04's fixes one at a time until I find what's causing it. On the plus side, Astro Rabby is playable now. Still acts weird when pressing B/A on the first screen, but the start button will start the game. EDIT: got it. Shin Megami Tensei - Devichil requires FF4F (VBK) to be readable. Before, it was always returning 0x00. With my return 0xFF patch, that broke. But it should be returning the VBK value, which also fixes it. Also need to handle FF68/FF6A reads. Was really hoping that'd help GBVideoPlayer too, but nope. It doesn't read any of those three registers.
2016-01-11 10:31:30 +00:00
auto APU::Master::read(uint16 addr) -> uint8 {
if(addr == 0xff24) { //NR50
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
return leftEnable << 7 | leftVolume << 4 | rightEnable << 3 | rightVolume;
Update to v096r04 release. byuu says: Changelog: - fixed S-DD1 RAM writes (Star Ocean audio fixed) - applied all of the DMG test ROM fixes discussed earlier; passes many more test ROMs now - at least until the GBVideoPlayer is working: for debugging purposes, CPU/PPU single-step now instead of sync just-in-time (~30% slower) - fixed OS X crash on NSTextView (hopefully, would be very odd if not) Unfortunately passing these test ROMs caused my favorite GB/GBC game to break all of its graphics =( Shin Megami Tensei - Devichil - Kuro no Sho (Japan) is all garbled now. I'm really quite bummed by this ... but I guess I'll go through and revert r04's fixes one at a time until I find what's causing it. On the plus side, Astro Rabby is playable now. Still acts weird when pressing B/A on the first screen, but the start button will start the game. EDIT: got it. Shin Megami Tensei - Devichil requires FF4F (VBK) to be readable. Before, it was always returning 0x00. With my return 0xFF patch, that broke. But it should be returning the VBK value, which also fixes it. Also need to handle FF68/FF6A reads. Was really hoping that'd help GBVideoPlayer too, but nope. It doesn't read any of those three registers.
2016-01-11 10:31:30 +00:00
}
if(addr == 0xff25) { //NR51
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
return noise.leftEnable << 7
| wave.leftEnable << 6
| square2.leftEnable << 5
| square1.leftEnable << 4
| noise.rightEnable << 3
| wave.rightEnable << 2
| square2.rightEnable << 1
| square1.rightEnable << 0;
Update to v096r04 release. byuu says: Changelog: - fixed S-DD1 RAM writes (Star Ocean audio fixed) - applied all of the DMG test ROM fixes discussed earlier; passes many more test ROMs now - at least until the GBVideoPlayer is working: for debugging purposes, CPU/PPU single-step now instead of sync just-in-time (~30% slower) - fixed OS X crash on NSTextView (hopefully, would be very odd if not) Unfortunately passing these test ROMs caused my favorite GB/GBC game to break all of its graphics =( Shin Megami Tensei - Devichil - Kuro no Sho (Japan) is all garbled now. I'm really quite bummed by this ... but I guess I'll go through and revert r04's fixes one at a time until I find what's causing it. On the plus side, Astro Rabby is playable now. Still acts weird when pressing B/A on the first screen, but the start button will start the game. EDIT: got it. Shin Megami Tensei - Devichil requires FF4F (VBK) to be readable. Before, it was always returning 0x00. With my return 0xFF patch, that broke. But it should be returning the VBK value, which also fixes it. Also need to handle FF68/FF6A reads. Was really hoping that'd help GBVideoPlayer too, but nope. It doesn't read any of those three registers.
2016-01-11 10:31:30 +00:00
}
if(addr == 0xff26) { //NR52
return enable << 7 | 0x70
| apu.noise.enable << 3
| apu.wave.enable << 2
| apu.square2.enable << 1
| apu.square1.enable << 0;
}
return 0xff;
}
auto APU::Master::write(uint16 addr, uint8 data) -> void {
if(addr == 0xff24) { //NR50
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
leftEnable = data & 0x80;
leftVolume = (data >> 4) & 7;
rightEnable = data & 0x08;
rightVolume = (data >> 0) & 7;
Update to v075r04 release. byuu says: Changelog: - hooked up everything necessary for Game Boy sound emulation ... - bgameboy and bsnes/SGB input 4MHz frequency, and output 44.1KHz frequency (produces soft static for now, to verify it is working) - rewrote all of gameboy/apu, it now has a 4MHz worker thread, and separate classes/folders for each channel+master, and serializes So it's basically all I can do without actual emulation code or human-readable documentation/example code.
2011-02-02 10:37:31 +00:00
}
Update to v096r04 release. byuu says: Changelog: - fixed S-DD1 RAM writes (Star Ocean audio fixed) - applied all of the DMG test ROM fixes discussed earlier; passes many more test ROMs now - at least until the GBVideoPlayer is working: for debugging purposes, CPU/PPU single-step now instead of sync just-in-time (~30% slower) - fixed OS X crash on NSTextView (hopefully, would be very odd if not) Unfortunately passing these test ROMs caused my favorite GB/GBC game to break all of its graphics =( Shin Megami Tensei - Devichil - Kuro no Sho (Japan) is all garbled now. I'm really quite bummed by this ... but I guess I'll go through and revert r04's fixes one at a time until I find what's causing it. On the plus side, Astro Rabby is playable now. Still acts weird when pressing B/A on the first screen, but the start button will start the game. EDIT: got it. Shin Megami Tensei - Devichil requires FF4F (VBK) to be readable. Before, it was always returning 0x00. With my return 0xFF patch, that broke. But it should be returning the VBK value, which also fixes it. Also need to handle FF68/FF6A reads. Was really hoping that'd help GBVideoPlayer too, but nope. It doesn't read any of those three registers.
2016-01-11 10:31:30 +00:00
if(addr == 0xff25) { //NR51
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
noise.leftEnable = data & 0x80;
wave.leftEnable = data & 0x40;
square2.leftEnable = data & 0x20;
square1.leftEnable = data & 0x10;
noise.rightEnable = data & 0x08;
wave.rightEnable = data & 0x04;
square2.rightEnable = data & 0x02;
square1.rightEnable = data & 0x01;
Update to v075r04 release. byuu says: Changelog: - hooked up everything necessary for Game Boy sound emulation ... - bgameboy and bsnes/SGB input 4MHz frequency, and output 44.1KHz frequency (produces soft static for now, to verify it is working) - rewrote all of gameboy/apu, it now has a 4MHz worker thread, and separate classes/folders for each channel+master, and serializes So it's basically all I can do without actual emulation code or human-readable documentation/example code.
2011-02-02 10:37:31 +00:00
}
Update to v096r04 release. byuu says: Changelog: - fixed S-DD1 RAM writes (Star Ocean audio fixed) - applied all of the DMG test ROM fixes discussed earlier; passes many more test ROMs now - at least until the GBVideoPlayer is working: for debugging purposes, CPU/PPU single-step now instead of sync just-in-time (~30% slower) - fixed OS X crash on NSTextView (hopefully, would be very odd if not) Unfortunately passing these test ROMs caused my favorite GB/GBC game to break all of its graphics =( Shin Megami Tensei - Devichil - Kuro no Sho (Japan) is all garbled now. I'm really quite bummed by this ... but I guess I'll go through and revert r04's fixes one at a time until I find what's causing it. On the plus side, Astro Rabby is playable now. Still acts weird when pressing B/A on the first screen, but the start button will start the game. EDIT: got it. Shin Megami Tensei - Devichil requires FF4F (VBK) to be readable. Before, it was always returning 0x00. With my return 0xFF patch, that broke. But it should be returning the VBK value, which also fixes it. Also need to handle FF68/FF6A reads. Was really hoping that'd help GBVideoPlayer too, but nope. It doesn't read any of those three registers.
2016-01-11 10:31:30 +00:00
if(addr == 0xff26) { //NR52
Update to v075r04 release. byuu says: Changelog: - hooked up everything necessary for Game Boy sound emulation ... - bgameboy and bsnes/SGB input 4MHz frequency, and output 44.1KHz frequency (produces soft static for now, to verify it is working) - rewrote all of gameboy/apu, it now has a 4MHz worker thread, and separate classes/folders for each channel+master, and serializes So it's basically all I can do without actual emulation code or human-readable documentation/example code.
2011-02-02 10:37:31 +00:00
enable = data & 0x80;
Update to v096r04 release. byuu says: Changelog: - fixed S-DD1 RAM writes (Star Ocean audio fixed) - applied all of the DMG test ROM fixes discussed earlier; passes many more test ROMs now - at least until the GBVideoPlayer is working: for debugging purposes, CPU/PPU single-step now instead of sync just-in-time (~30% slower) - fixed OS X crash on NSTextView (hopefully, would be very odd if not) Unfortunately passing these test ROMs caused my favorite GB/GBC game to break all of its graphics =( Shin Megami Tensei - Devichil - Kuro no Sho (Japan) is all garbled now. I'm really quite bummed by this ... but I guess I'll go through and revert r04's fixes one at a time until I find what's causing it. On the plus side, Astro Rabby is playable now. Still acts weird when pressing B/A on the first screen, but the start button will start the game. EDIT: got it. Shin Megami Tensei - Devichil requires FF4F (VBK) to be readable. Before, it was always returning 0x00. With my return 0xFF patch, that broke. But it should be returning the VBK value, which also fixes it. Also need to handle FF68/FF6A reads. Was really hoping that'd help GBVideoPlayer too, but nope. It doesn't read any of those three registers.
2016-01-11 10:31:30 +00:00
if(!enable) {
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
//power(bool) resets length counters when true (eg for CGB only)
apu.square1.power(system.cgb());
apu.square2.power(system.cgb());
apu.wave.power(system.cgb());
apu.noise.power(system.cgb());
Update to v096r04 release. byuu says: Changelog: - fixed S-DD1 RAM writes (Star Ocean audio fixed) - applied all of the DMG test ROM fixes discussed earlier; passes many more test ROMs now - at least until the GBVideoPlayer is working: for debugging purposes, CPU/PPU single-step now instead of sync just-in-time (~30% slower) - fixed OS X crash on NSTextView (hopefully, would be very odd if not) Unfortunately passing these test ROMs caused my favorite GB/GBC game to break all of its graphics =( Shin Megami Tensei - Devichil - Kuro no Sho (Japan) is all garbled now. I'm really quite bummed by this ... but I guess I'll go through and revert r04's fixes one at a time until I find what's causing it. On the plus side, Astro Rabby is playable now. Still acts weird when pressing B/A on the first screen, but the start button will start the game. EDIT: got it. Shin Megami Tensei - Devichil requires FF4F (VBK) to be readable. Before, it was always returning 0x00. With my return 0xFF patch, that broke. But it should be returning the VBK value, which also fixes it. Also need to handle FF68/FF6A reads. Was really hoping that'd help GBVideoPlayer too, but nope. It doesn't read any of those three registers.
2016-01-11 10:31:30 +00:00
power();
}
Update to v075r04 release. byuu says: Changelog: - hooked up everything necessary for Game Boy sound emulation ... - bgameboy and bsnes/SGB input 4MHz frequency, and output 44.1KHz frequency (produces soft static for now, to verify it is working) - rewrote all of gameboy/apu, it now has a 4MHz worker thread, and separate classes/folders for each channel+master, and serializes So it's basically all I can do without actual emulation code or human-readable documentation/example code.
2011-02-02 10:37:31 +00:00
}
}
Update to v095r08 release. byuu says: Changelog: - added preliminary WASAPI driver (it's really terrible, though. Patches most welcome.) - all of processor/ updated to auto fn() -> ret syntax - all of gb/ updated to auto fn() -> ret syntax If you want to test the WASAPI driver, then edit ui-tomoko/GNUmakefile, and replace audio.xaudio2 with audio.wasapi Note that the two drivers are incompatible and cannot co-exist (yet. We can probably make it work in the future.) All that's left for the auto fn() -> ret syntax is the NES core and the balanced/performance SNES components. This is kind of a big deal because this syntax change causes diffs between WIPs to go crazy. So the sooner we get this done and out of the way, the better. It's also nice from a consistency standpoint, of course.
2015-11-21 07:36:48 +00:00
auto APU::Master::power() -> void {
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
leftEnable = 0;
leftVolume = 0;
rightEnable = 0;
rightVolume = 0;
noise.leftEnable = 0;
wave.leftEnable = 0;
square2.leftEnable = 0;
square1.leftEnable = 0;
noise.rightEnable = 0;
wave.rightEnable = 0;
square2.rightEnable = 0;
square1.rightEnable = 0;
Update to v075r04 release. byuu says: Changelog: - hooked up everything necessary for Game Boy sound emulation ... - bgameboy and bsnes/SGB input 4MHz frequency, and output 44.1KHz frequency (produces soft static for now, to verify it is working) - rewrote all of gameboy/apu, it now has a 4MHz worker thread, and separate classes/folders for each channel+master, and serializes So it's basically all I can do without actual emulation code or human-readable documentation/example code.
2011-02-02 10:37:31 +00:00
enable = 0;
Update to v075r05 release. byuu says: Added Game Boy sound emulation, all four channels. It's really, really, really bad. Plenty of bugs, I don't even know what the fuck a high-pass filter is so that isn't there. Hermite resampling from 4MHz down to 44KHz. But it's tolerable. I don't understand what sweep is for at all, and I'm sure I have that insane recursive reload behavior wrong. This is pretty much my own design. I referenced blargg's gb snd emu, blargg's older gb apu ref, Cydrak's APU core, that lousy gbdev wiki article, the completely and utterly worthless pandocs, and received nothing but bad and wrong information that just wasted my time from But I managed to pull it off. It's also painfully slow, like 250fps on my machine slow. Countless optimizations are possible.
2011-02-02 10:38:28 +00:00
center = 0;
left = 0;
right = 0;
Update to v093r08 release. byuu says: Changelog: - Game Boy and Game Boy Color now have a weak hipass filter to remove DC bias (or whatever) - Game Boy and Game Boy Color now have cycle-based PPU renderers instead of scanline-based renderers - improved Game Boy color emulation palette contrast - fixed GTK+ ListView selection bug - fixed a typo when saving states (should say "Saved to slot N", not "Save to slot N")
2013-12-11 11:19:17 +00:00
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
centerBias = 0;
leftBias = 0;
rightBias = 0;
Update to v075r04 release. byuu says: Changelog: - hooked up everything necessary for Game Boy sound emulation ... - bgameboy and bsnes/SGB input 4MHz frequency, and output 44.1KHz frequency (produces soft static for now, to verify it is working) - rewrote all of gameboy/apu, it now has a 4MHz worker thread, and separate classes/folders for each channel+master, and serializes So it's basically all I can do without actual emulation code or human-readable documentation/example code.
2011-02-02 10:37:31 +00:00
}
Update to v095r08 release. byuu says: Changelog: - added preliminary WASAPI driver (it's really terrible, though. Patches most welcome.) - all of processor/ updated to auto fn() -> ret syntax - all of gb/ updated to auto fn() -> ret syntax If you want to test the WASAPI driver, then edit ui-tomoko/GNUmakefile, and replace audio.xaudio2 with audio.wasapi Note that the two drivers are incompatible and cannot co-exist (yet. We can probably make it work in the future.) All that's left for the auto fn() -> ret syntax is the NES core and the balanced/performance SNES components. This is kind of a big deal because this syntax change causes diffs between WIPs to go crazy. So the sooner we get this done and out of the way, the better. It's also nice from a consistency standpoint, of course.
2015-11-21 07:36:48 +00:00
auto APU::Master::serialize(serializer& s) -> void {
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
s.integer(leftEnable);
s.integer(leftVolume);
s.integer(rightEnable);
s.integer(rightVolume);
s.integer(noise.leftEnable);
s.integer(wave.leftEnable);
s.integer(square2.leftEnable);
s.integer(square1.leftEnable);
s.integer(noise.rightEnable);
s.integer(wave.rightEnable);
s.integer(square2.rightEnable);
s.integer(square1.rightEnable);
Update to v075r04 release. byuu says: Changelog: - hooked up everything necessary for Game Boy sound emulation ... - bgameboy and bsnes/SGB input 4MHz frequency, and output 44.1KHz frequency (produces soft static for now, to verify it is working) - rewrote all of gameboy/apu, it now has a 4MHz worker thread, and separate classes/folders for each channel+master, and serializes So it's basically all I can do without actual emulation code or human-readable documentation/example code.
2011-02-02 10:37:31 +00:00
s.integer(enable);
Update to v075r05 release. byuu says: Added Game Boy sound emulation, all four channels. It's really, really, really bad. Plenty of bugs, I don't even know what the fuck a high-pass filter is so that isn't there. Hermite resampling from 4MHz down to 44KHz. But it's tolerable. I don't understand what sweep is for at all, and I'm sure I have that insane recursive reload behavior wrong. This is pretty much my own design. I referenced blargg's gb snd emu, blargg's older gb apu ref, Cydrak's APU core, that lousy gbdev wiki article, the completely and utterly worthless pandocs, and received nothing but bad and wrong information that just wasted my time from But I managed to pull it off. It's also painfully slow, like 250fps on my machine slow. Countless optimizations are possible.
2011-02-02 10:38:28 +00:00
s.integer(center);
s.integer(left);
s.integer(right);
Update to v093r08 release. byuu says: Changelog: - Game Boy and Game Boy Color now have a weak hipass filter to remove DC bias (or whatever) - Game Boy and Game Boy Color now have cycle-based PPU renderers instead of scanline-based renderers - improved Game Boy color emulation palette contrast - fixed GTK+ ListView selection bug - fixed a typo when saving states (should say "Saved to slot N", not "Save to slot N")
2013-12-11 11:19:17 +00:00
Update to v096r05 release. byuu says: Changelog: - GB: re-enabling the LCD resets the display to LY=0,LX=0 [1] - GB: emulated new findings (as of today!) for a DMG quirk that triggers an extra OAM STAT IRQ when Vblank STAT IRQs are off - GB: made VBK, BGPI, OBPI readable - GB: fixed APU length operations - GB: fixed APU sweep operations - NES: fixed cartridge/ -> board/ manifest lookups for mirroring/pinous - hiro/Cocoa: added endrift's plist keys Fixed: - Astro Rabby is fully playable, even the title screen works correctly - Bomb Jack is fully playable - Kirby's Dream Land 2 intro scrolling first scanline of Rick is now fixed - GBVideoPlayer functions correctly [2] - Shin Megami Tensei: Devichil series regression fixed [1] doesn't pass oam_bug-2/1-lcd_sync; because it seems to want LY=0,LX>0, and I can't step the PPU in a register write as it's not a state machine; the effect is emulated, it just starts the frame a tiny bit sooner. blargg's testing is brutal, you can't be even one cycle off or the test will fail. [2] note that you will need the GBC Display Emulation shader from hunterk's repository, or it will look like absolute shit. The inter-frame blending is absolutely critical here.
2016-01-12 11:08:34 +00:00
s.integer(centerBias);
s.integer(leftBias);
s.integer(rightBias);
Update to v075r04 release. byuu says: Changelog: - hooked up everything necessary for Game Boy sound emulation ... - bgameboy and bsnes/SGB input 4MHz frequency, and output 44.1KHz frequency (produces soft static for now, to verify it is working) - rewrote all of gameboy/apu, it now has a 4MHz worker thread, and separate classes/folders for each channel+master, and serializes So it's basically all I can do without actual emulation code or human-readable documentation/example code.
2011-02-02 10:37:31 +00:00
}