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mapper218: force vram_size to 0 (ignore whatever is in the broken header)

This commit is contained in:
goyuken 2012-10-13 16:19:08 +00:00
parent db0783f606
commit 402508e4e5
1 changed files with 9 additions and 0 deletions
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9
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper218.cs
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@ -21,6 +21,7 @@ namespace BizHawk.Emulation.Consoles.Nintendo
// the cart actually has 0k vram, but due to massive abuse of the ines format, is labeled as 8k
// supposed vram is (correctly) not used in our implementation
AssertPrg(8, 16, 32); AssertChr(0); /*AssertVram(0);*/ AssertWram(0);
Cart.vram_size = 0; // force vram size 0
break;
default:
return false;
@ -30,15 +31,23 @@ namespace BizHawk.Emulation.Consoles.Nintendo
switch (Cart.inesmirroring)
{
case 1: // VA10 to PA10
// pattern: ABABABAB
// nametable: ABAB (vertical)
chr_addr_mask = 1 << 10;
break;
case 0: // VA10 to PA11
// pattern: AABBAABB
// nametable: AABB (horizontal)
chr_addr_mask = 1 << 11;
break;
case 2: // VA10 to PA12
// pattern: AAAABBBB
// nametable: AAAA (one screen A)
chr_addr_mask = 1 << 12;
break;
case 3: // VA10 to PA13
// pattern: AAAAAAAA
// nametable: BBBB (one screen B)
chr_addr_mask = 1 << 13;
break;
default: