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nes: vrc7: support ines without crc. in case someone ever makes a vrc7 homebrew. which they won't.

This commit is contained in:
goyuken 2012-12-18 23:09:33 +00:00
parent 03f5b3ae96
commit 3a9fa9abb1
1 changed files with 36 additions and 21 deletions
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57
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/VRC7.cs
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@ -33,7 +33,8 @@ namespace BizHawk.Emulation.Consoles.Nintendo
public override void SyncState(Serializer ser) public override void SyncState(Serializer ser)
{ {
base.SyncState(ser); base.SyncState(ser);
fm.SyncState(ser); if (fm != null)
fm.SyncState(ser);
ser.Sync("prg_banks_8k", ref prg_banks_8k); ser.Sync("prg_banks_8k", ref prg_banks_8k);
ser.Sync("chr_banks_1k", ref chr_banks_1k); ser.Sync("chr_banks_1k", ref chr_banks_1k);
ser.Sync("irq_mode", ref irq_mode); ser.Sync("irq_mode", ref irq_mode);
@ -56,22 +57,33 @@ namespace BizHawk.Emulation.Consoles.Nintendo
switch (Cart.board_type) switch (Cart.board_type)
{ {
case "MAPPER085": case "MAPPER085":
// presumably the only reason a homebrew would use mapper085 is for the sound?
// so initialize like lagrange point
remap = (addr) => ((addr & 0xF000) | ((addr & 0x30) >> 4));
fm = new Sound.YM2413(Sound.YM2413.ChipType.VRC7);
break; break;
case "KONAMI-VRC-7": case "KONAMI-VRC-7":
AssertPrg(128,512); AssertChr(0,128); AssertVram(0,8); AssertWram(0,8); AssertPrg(128, 512); AssertChr(0, 128); AssertVram(0, 8); AssertWram(0, 8);
if (Cart.pcb == "353429")
{
//tiny toons 2
remap = (addr) => ((addr & 0xF000) | ((addr & 0x8) >> 3));
// there is no resonator or crystal on the board for the fm chip
fm = null;
}
else if (Cart.pcb == "352402")
{
//lagrange point
remap = (addr) => ((addr & 0xF000) | ((addr & 0x30) >> 4));
fm = new Sound.YM2413(Sound.YM2413.ChipType.VRC7);
}
else
throw new Exception("Unknown PCB type for VRC7");
break; break;
default: default:
return false; return false;
} }
if (Cart.pcb == "353429")
//tiny toons 2
remap = (addr) => ((addr & 0xF000) | ((addr & 0x8) >> 3));
else if(Cart.pcb == "352402")
//lagrange point
remap = (addr) => ((addr & 0xF000) | ((addr & 0x30) >> 4));
else throw new Exception("Unknown PCB type for VRC7");
prg_bank_mask_8k = Cart.prg_size / 8 - 1; prg_bank_mask_8k = Cart.prg_size / 8 - 1;
chr_bank_mask_1k = Cart.chr_size - 1; chr_bank_mask_1k = Cart.chr_size - 1;
@ -79,8 +91,6 @@ namespace BizHawk.Emulation.Consoles.Nintendo
prg_banks_8k[3] = (byte)(0xFF & prg_bank_mask_8k); prg_banks_8k[3] = (byte)(0xFF & prg_bank_mask_8k);
fm = new Sound.YM2413(Sound.YM2413.ChipType.VRC7);
return true; return true;
} }
public override byte ReadPRG(int addr) public override byte ReadPRG(int addr)
@ -124,14 +134,17 @@ namespace BizHawk.Emulation.Consoles.Nintendo
public override void ApplyCustomAudio(short[] samples) public override void ApplyCustomAudio(short[] samples)
{ {
short[] fmsamples = new short[samples.Length]; if (fm != null)
fm.GetSamples(fmsamples);
//naive mixing. need to study more
int len = samples.Length;
for (int i = 0; i < len; i++)
{ {
short fmsamp = fmsamples[i]; short[] fmsamples = new short[samples.Length];
samples[i] = (short)(samples[i] + fmsamp); fm.GetSamples(fmsamples);
//naive mixing. need to study more
int len = samples.Length;
for (int i = 0; i < len; i++)
{
short fmsamp = fmsamples[i];
samples[i] = (short)(samples[i] + fmsamp);
}
} }
} }
@ -148,11 +161,13 @@ namespace BizHawk.Emulation.Consoles.Nintendo
case 0x1001: case 0x1001:
//sound address port //sound address port
fm.RegisterLatch = value; if (fm != null)
fm.RegisterLatch = value;
break; break;
case 0x1003: case 0x1003:
//sound data port //sound data port
fm.Write(value); if (fm != null)
fm.Write(value);
break; break;
//a bit creepy to mask this for lagrange point which has no VROM, but the mask will be 0xFFFFFFFF so its OK //a bit creepy to mask this for lagrange point which has no VROM, but the mask will be 0xFFFFFFFF so its OK