public static sbyte MReadByte(int address)
{
address &= 0xffffff;
sbyte result = 0;
if (address >= 0 && address <= 0x1ffff)
{
result = (sbyte)(mainbiosrom[address]);
}
else if (address >= 0x100000 && address <= 0x3fffff)
{
if (address < 0x100000 + Memory.mainrom.Length)
{
result = (sbyte)(Memory.mainrom[address - 0x100000]);
}
else
{
result = 0;
}
}
else if (address >= 0x800000 && address <= 0x81ffff)
{
result = (sbyte)Memory.mainram[address - 0x800000];
}
else if (address >= 0x900000 && address <= 0x903fff)
{
result = (sbyte)pgm_bg_videoram[address - 0x900000];
}
else if (address >= 0x904000 && address <= 0x905fff)
{
result = (sbyte)pgm_tx_videoram[address - 0x904000];
}
else if (address >= 0x907000 && address <= 0x9077ff)
{
result = (sbyte)pgm_rowscrollram[address - 0x907000];
}
else if (address >= 0xa00000 && address <= 0xa011ff)
{
int offset = (address - 0xa00000) / 2;
if ((address % 2) == 0)
{
result = (sbyte)(Generic.paletteram16[offset] >> 8);
}
else if ((address % 2) == 1)
{
result = (sbyte)(Generic.paletteram16[offset]);
}
}
else if (address >= 0xb00000 && address <= 0xb0ffff)
{
result = (sbyte)pgm_videoregs[address - 0xb00000];
}
else if (address >= 0xc00002 && address <= 0xc00003)
{
result = (sbyte)Sound.latched_value[0];
}
else if (address >= 0xc00004 && address <= 0xc00005)
{
result = (sbyte)Sound.latched_value[1];
}
else if (address >= 0xc00006 && address <= 0xc00007)
{
result = (sbyte)PGM.pgm_calendar_r();
}
else if (address >= 0xc0000c && address <= 0xc0000d)
{
result = (sbyte)Sound.latched_value[2];
}
else if (address >= 0xc08000 && address <= 0xc08001)
{
result = (sbyte)short0;
}
else if (address >= 0xc08002 && address <= 0xc08003)
{
result = (sbyte)short1;
}
else if (address >= 0xc08004 && address <= 0xc08005)
{
result = (sbyte)short2;
}
else if (address >= 0xc08006 && address <= 0xc08007)
{
result = (sbyte)short3;
}
else if (address >= 0xc10000 && address <= 0xc1ffff)
{
result = (sbyte)z80_ram_r(address - 0xc10000);
}
return(result);
}
public static short MReadWord(int address)
{
address &= 0xffffff;
short result = 0;
if (address >= 0 && address + 1 <= 0x1ffff)
{
result = (short)(mainbiosrom[address] * 0x100 + mainbiosrom[address + 1]);
}
else if (address >= 0x100000 && address + 1 <= 0x3fffff)
{
if (address + 1 < 0x100000 + Memory.mainrom.Length)
{
result = (short)(Memory.mainrom[address - 0x100000] * 0x100 + Memory.mainrom[address - 0x100000 + 1]);
}
else
{
result = 0;
}
}
else if (address >= 0x800000 && address + 1 <= 0x81ffff)
{
result = (short)(Memory.mainram[address - 0x800000] * 0x100 + Memory.mainram[address - 0x800000 + 1]);
}
else if (address >= 0x900000 && address + 1 <= 0x903fff)
{
result = (short)(pgm_bg_videoram[address - 0x900000] * 0x100 + pgm_bg_videoram[address - 0x900000 + 1]);
}
else if (address >= 0x904000 && address + 1 <= 0x905fff)
{
result = (short)(pgm_tx_videoram[address - 0x904000] * 0x100 + pgm_tx_videoram[address - 0x904000 + 1]);
}
else if (address >= 0x907000 && address + 1 <= 0x9077ff)
{
result = (short)(pgm_rowscrollram[address - 0x907000] * 0x100 + pgm_rowscrollram[address - 0x907000 + 1]);
}
else if (address >= 0xa00000 && address + 1 <= 0xa011ff)
{
int offset = (address - 0xa0000) / 2;
result = (short)Generic.paletteram16[offset];
}
else if (address >= 0xb00000 && address + 1 <= 0xb0ffff)
{
result = (short)(pgm_videoregs[address - 0xb00000] * 0x100 + pgm_videoregs[address - 0xb00000 + 1]);
}
else if (address >= 0xc00002 && address + 1 <= 0xc00003)
{
result = (short)Sound.latched_value[0];
}
else if (address >= 0xc00004 && address + 1 <= 0xc00005)
{
result = (short)Sound.latched_value[1];
}
else if (address >= 0xc00006 && address + 1 <= 0xc00007)
{
result = (short)PGM.pgm_calendar_r();
}
else if (address >= 0xc0000c && address + 1 <= 0xc0000d)
{
result = (short)Sound.latched_value[2];
}
else if (address >= 0xc08000 && address + 1 <= 0xc08001)
{
result = short0;
}
else if (address >= 0xc08002 && address + 1 <= 0xc08003)
{
result = short1;
}
else if (address >= 0xc08004 && address + 1 <= 0xc08005)
{
result = short2;
}
else if (address >= 0xc08006 && address + 1 <= 0xc08007)
{
result = short3;
}
else if (address >= 0xc10000 && address + 1 <= 0xc1ffff)
{
result = (short)(z80_ram_r(address - 0xc10000) * 0x100 + z80_ram_r(address - 0xc10000 + 1));
}
return(result);
}