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NES - code clean up on sunsoft1

This commit is contained in:
andres.delikat 2011-04-17 20:40:25 +00:00
parent d952e21463
commit 043f8c7a70
1 changed files with 7 additions and 11 deletions
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18
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Sunsoft1.cs
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@ -24,7 +24,7 @@ Other chips used: Sunsoft-1
class Sunsoft1 : NES.NESBoardBase
{
int prg, chr;
int chr_mask;
int left_piece = 0;
int right_piece = 3;
@ -38,23 +38,21 @@ Other chips used: Sunsoft-1
default:
return false;
}
chr_mask = (Cart.chr_size / 4) - 1;
SetMirrorType(Cart.pad_h, Cart.pad_v);
return true;
}
public override byte ReadPPU(int addr)
{
left_piece &= 3;
right_piece &= 3;
if (addr < 0x1000)
{
return VROM[(addr%0x1000) + (left_piece*0x1000)];
return VROM[(addr & 0xFFF) + (left_piece*0x1000)];
}
else if (addr < 0x2000)
{
return VROM[(addr%0x1000) + (right_piece*0x1000)];
return VROM[(addr & 0xFFF) + (right_piece * 0x1000)];
}
return base.ReadPPU(addr);
@ -62,10 +60,8 @@ Other chips used: Sunsoft-1
public override void WriteWRAM(int addr, byte value)
{
left_piece = value & 7;
right_piece = (value & 127) / 16;
Debug.Assert(left_piece < 8);
Debug.Assert(right_piece < 8);
left_piece = value & 7 & chr_mask;
right_piece = (value >> 4) & 7 & chr_mask;
}
}
}