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GBHawk: better initial RAM state

This commit is contained in:
alyosha-tas 2020-12-17 21:02:41 -05:00
parent fe5655d1e3
commit 3cc9684ebd
1 changed files with 111 additions and 37 deletions
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148
src/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/GBHawk.cs
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@ -231,47 +231,121 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
ZP_RAM[i] = 0xFF;
}
for (int i = 0; i < 0x800; i++)
for (int i = 0; i < ZP_RAM.Length; i++)
{
if ((i & 0xF) < 8)
{
RAM[i] = 0xFF;
RAM[i + 0x1000] = 0xFF;
RAM[i + 0x2000] = 0xFF;
RAM[i + 0x3000] = 0xFF;
RAM[i + 0x4000] = 0xFF;
RAM[i + 0x5000] = 0xFF;
RAM[i + 0x6000] = 0xFF;
RAM[i + 0x7000] = 0xFF;
ZP_RAM[i] = 0xFF;
}
RAM[i + 0x800] = 0;
RAM[i + 0x1800] = 0;
RAM[i + 0x2800] = 0;
RAM[i + 0x3800] = 0;
RAM[i + 0x4800] = 0;
RAM[i + 0x5800] = 0;
RAM[i + 0x6800] = 0;
RAM[i + 0x7800] = 0;
if (is_GBC)
{
if (_syncSettings.GBACGB)
{
// on GBA, initial RAM is mostly random, choosing 0xFF as oracle of ages / seasons check for 0 which is unlikely to be true
for (int i = 0; i < RAM.Length; i++)
{
RAM[i] = 0xFF;
}
}
else
{
RAM[i] = 0;
RAM[i + 0x1000] = 0;
RAM[i + 0x2000] = 0;
RAM[i + 0x3000] = 0;
RAM[i + 0x4000] = 0;
RAM[i + 0x5000] = 0;
RAM[i + 0x6000] = 0;
RAM[i + 0x7000] = 0;
else
{
for (int i = 0; i < 0x800; i++)
{
if ((i & 0xF) < 8)
{
RAM[i] = 0xFF;
RAM[i + 0x1000] = 0xFF;
RAM[i + 0x2000] = 0xFF;
RAM[i + 0x3000] = 0xFF;
RAM[i + 0x4000] = 0xFF;
RAM[i + 0x5000] = 0xFF;
RAM[i + 0x6000] = 0xFF;
RAM[i + 0x7000] = 0xFF;
RAM[i + 0x800] = 0xFF;
RAM[i + 0x1800] = 0xFF;
RAM[i + 0x2800] = 0xFF;
RAM[i + 0x3800] = 0xFF;
RAM[i + 0x4800] = 0xFF;
RAM[i + 0x5800] = 0xFF;
RAM[i + 0x6800] = 0xFF;
RAM[i + 0x7800] = 0xFF;
RAM[i + 0x800] = 0;
RAM[i + 0x1800] = 0;
RAM[i + 0x2800] = 0;
RAM[i + 0x3800] = 0;
RAM[i + 0x4800] = 0;
RAM[i + 0x5800] = 0;
RAM[i + 0x6800] = 0;
RAM[i + 0x7800] = 0;
}
else
{
RAM[i] = 0;
RAM[i + 0x1000] = 0;
RAM[i + 0x2000] = 0;
RAM[i + 0x3000] = 0;
RAM[i + 0x4000] = 0;
RAM[i + 0x5000] = 0;
RAM[i + 0x6000] = 0;
RAM[i + 0x7000] = 0;
RAM[i + 0x800] = 0xFF;
RAM[i + 0x1800] = 0xFF;
RAM[i + 0x2800] = 0xFF;
RAM[i + 0x3800] = 0xFF;
RAM[i + 0x4800] = 0xFF;
RAM[i + 0x5800] = 0xFF;
RAM[i + 0x6800] = 0xFF;
RAM[i + 0x7800] = 0xFF;
}
}
// some bytes are like this is Gambatte, hardware anomoly? Is it consistent across versions?
/*
for (int i = 0; i < 16; i++)
{
RAM[0xE02 + (16 * i)] = 0;
RAM[0xE0A + (16 * i)] = 0xFF;
RAM[0x1E02 + (16 * i)] = 0;
RAM[0x1E0A + (16 * i)] = 0xFF;
RAM[0x2E02 + (16 * i)] = 0;
RAM[0x2E0A + (16 * i)] = 0xFF;
RAM[0x3E02 + (16 * i)] = 0;
RAM[0x3E0A + (16 * i)] = 0xFF;
RAM[0x4E02 + (16 * i)] = 0;
RAM[0x4E0A + (16 * i)] = 0xFF;
RAM[0x5E02 + (16 * i)] = 0;
RAM[0x5E0A + (16 * i)] = 0xFF;
RAM[0x6E02 + (16 * i)] = 0;
RAM[0x6E0A + (16 * i)] = 0xFF;
RAM[0x7E02 + (16 * i)] = 0;
RAM[0x7E0A + (16 * i)] = 0xFF;
}
*/
}
}
else
{
for (int j = 0; j < 2; j++)
{
for (int i = 0; i < 0x100; i++)
{
RAM[j * 0x1000 + i] = 0;
RAM[j * 0x1000 + i + 0x100] = 0xFF;
RAM[j * 0x1000 + i + 0x200] = 0;
RAM[j * 0x1000 + i + 0x300] = 0xFF;
RAM[j * 0x1000 + i + 0x400] = 0;
RAM[j * 0x1000 + i + 0x500] = 0xFF;
RAM[j * 0x1000 + i + 0x600] = 0;
RAM[j * 0x1000 + i + 0x700] = 0xFF;
RAM[j * 0x1000 + i + 0x800] = 0;
RAM[j * 0x1000 + i + 0x900] = 0xFF;
RAM[j * 0x1000 + i + 0xA00] = 0;
RAM[j * 0x1000 + i + 0xB00] = 0xFF;
RAM[j * 0x1000 + i + 0xC00] = 0;
RAM[j * 0x1000 + i + 0xD00] = 0xFF;
RAM[j * 0x1000 + i + 0xE00] = 0;
RAM[j * 0x1000 + i + 0xF00] = 0xFF;
}
}
}
}