Passed blarrg's cgb_sound tests, and other sound things 🔊 (#286)

* Got registers in the blarrgg CGB test passing

* Passed blargg CGB Length tests

* Move the frame sequencer into it's own file, so that it can be used by
channels

* Got through a lot of the trigger tests

* Fixed registers tests as well need to finish triggers

* Starting to solve isEnabeld to finally pass triggers

* Re-fixed isEnabledStatus

* Literally on the last trigger test for sound

* Left a note, and fixed debugger stepping

* Still stuck :(

* Left another note

* Fixed frame sequencer being flipped, and fixed NR52 writing

* Left a note to look at binjgb

* FINALLY PASSED THE SOUND TRIGGER TEST!!!

* Fixed channel 2 trigger

* Passed all trigger tests

* Passes sweep #2

* Passed more sweep tests

* Soe updates still failing 5

* Finally Passed the sweep subtest :D

* Passed sweep details

* Started fixing some things, and left notes for later

* Fixing up period timing

* Fixed up negative periods on channels

* ONE LAST WAVE CHANNEL TEST!!!

* FINISHED BLARGG CGB SOUND TEST!!!

* Updated all the tests

* Added hotkeys to help

* Logged out some buffers

* Moved around some more crackling debug logic

* Removed all the debug output, and fixd the crackling a little bit

* Fixed up the tests

* Fixed up package-lock

.gitattributes

@@ -9,6 +9,9 @@ lib/**/*.js linguist-vendored=false
 dist/wasm/*.wasm linguist-vendored=false
 dist/wasm/*.wast linguist-vendored=false
 dist/wasm/*.wat linguist-vendored=false
+docs/wasm/*.wasm linguist-vendored=false
+docs/wasm/*.wast linguist-vendored=false
+docs/wasm/*.wat linguist-vendored=false
 **/*.wasm linguist-vendored=false
 **/*.wast linguist-vendored=false
 **/*.wat linguist-vendored=false

README.md

@@ -156,13 +156,14 @@ These are all currently known passing tests (by me), there may be more test roms
 
 [Repo with all blargg's tests and source](https://github.com/retrio/gb-test-roms)
 
-cpu_instrs, instr_timing, mem_timing, mem_timing-2, halt_bug
+cpu_instrs, instr_timing, mem_timing, mem_timing-2, halt_bug, cgb_sound
 
 ![Cpu Instructions all tests passing](./test/accuracy/testroms/blargg/cpu_instrs/cpu_instrs.golden.png)
 ![Instruction timing all tests passing](./test/accuracy/testroms/blargg/instr_timing/instr_timing.golden.png)
 ![Memory timing all tests passing](./test/accuracy/testroms/blargg/mem_timing/mem_timing.golden.png)
 ![Memory timing 2 all tests passing](./test/accuracy/testroms/blargg/mem_timing-2/mem_timing-2.golden.png)
 ![halt bug all tests passing](./test/accuracy/testroms/blargg/halt_bug/halt_bug.golden.png)
+![cgb sound all tests passing](./test/accuracy/testroms/blargg/cgb_sound/cgb_sound.golden.png)
 
 ### Mooneye
 

core/memory/readTraps.ts

@@ -2,7 +2,7 @@ import { Memory } from './memory';
 import { Cpu } from '../cpu/index';
 import { Graphics } from '../graphics/graphics';
 import { Lcd } from '../graphics/index';
-import { batchProcessAudio, SoundRegisterReadTraps } from '../sound/index';
+import { batchProcessAudio, SoundRegisterReadTraps, Channel3 } from '../sound/index';
 import { eightBitStoreIntoGBMemory } from './store';
 import { eightBitLoadFromGBMemory } from './load';
 import { Joypad, getJoypadState } from '../joypad/index';
@@ -90,10 +90,21 @@ export function checkReadTraps(offset: i32): i32 {
     batchProcessAudio();
     return SoundRegisterReadTraps(offset);
   }
+
   // FF27 - FF2F not used
+  // http://gbdev.gg8.se/wiki/articles/Gameboy_sound_hardware#Register_Reading
+  // Always read as 0xFF
+  if (offset >= 0xff27 && offset <= 0xff2f) {
+    return 0xff;
+  }
+
   // Final Wave Table for Channel 3
   if (offset >= 0xff30 && offset <= 0xff3f) {
     batchProcessAudio();
+
+    if (Channel3.isEnabled) {
+      return Channel3.handleWaveRamRead();
+    }
     return -1;
   }
 

core/memory/writeTraps.ts

@@ -2,7 +2,7 @@ import { Memory } from './memory';
 import { Cpu } from '../cpu/index';
 import { Graphics } from '../graphics/graphics';
 import { Palette, writeColorPaletteToMemory, Lcd } from '../graphics/index';
-import { batchProcessAudio, SoundRegisterWriteTraps } from '../sound/index';
+import { batchProcessAudio, SoundRegisterWriteTraps, Channel3 } from '../sound/index';
 import { Timers, batchProcessTimers } from '../timers/index';
 import { Serial } from '../serial/serial';
 import { Interrupts } from '../interrupts/index';
@@ -110,9 +110,17 @@ export function checkWriteTraps(offset: i32, value: i32): boolean {
   }
 
   // FF27 - FF2F not used
+
   // Final Wave Table for Channel 3
   if (offset >= 0xff30 && offset <= 0xff3f) {
     batchProcessAudio();
+
+    // Need to handle the write if channel 3 is enabled
+    if (Channel3.isEnabled) {
+      Channel3.handleWaveRamWrite(value);
+      return false;
+    }
+    return true;
   }
 
   // Other Memory effects fomr read/write to Lcd/Graphics

core/sound/accumulator.ts

@@ -71,7 +71,7 @@ export function accumulateSound(numberOfCycles: i32): void {
 
   // Do Some downsampling magic
   let downSampleCycleCounter = Sound.downSampleCycleCounter;
-  downSampleCycleCounter += numberOfCycles * Sound.downSampleCycleMultiplier;
+  downSampleCycleCounter += numberOfCycles;
   let maxDownSampleCycles = Sound.maxDownSampleCycles();
   if (downSampleCycleCounter >= maxDownSampleCycles) {
     // Reset the downsample counter