59 lines
1.5 KiB
C#
59 lines
1.5 KiB
C#
namespace BizHawk.Emulation.Cores.Sega.MasterSystem
|
|
{
|
|
public partial class SMS
|
|
{
|
|
// The CodeMasters mapper has 3 banks of 16kb, like the Sega mapper.
|
|
// The differences are that the paging control addresses are different, and the first 1K of ROM is not protected.
|
|
// Bank 0: Control Address $0000 - Maps $0000 - $3FFF
|
|
// Bank 1: Control Address $4000 - Maps $4000 - $7FFF
|
|
// Bank 2: Control Address $8000 - Maps $8000 - $BFFF
|
|
// System RAM is at $C000+ as in the Sega mapper.
|
|
|
|
byte xCoord = 128;
|
|
byte yCoord = 100;
|
|
|
|
enum Axis { XAxis, YAxis };
|
|
Axis axis = Axis.XAxis;
|
|
|
|
|
|
byte ReadMemoryTO(ushort address)
|
|
{
|
|
if (address < 0x8000) return RomData[address & 0x1FFF];
|
|
if (address == 0x8000)
|
|
{
|
|
// return press status
|
|
return 0;
|
|
//return (byte)(Controller["P1 B1"] ? 1 : 0);
|
|
}
|
|
if (address == 0xA000)
|
|
{
|
|
if (Controller["P1 Left"]) xCoord++;
|
|
if (Controller["P1 Right"]) xCoord++;
|
|
if (Controller["P1 Up"]) yCoord--;
|
|
if (Controller["P1 Down"]) yCoord++;
|
|
return 0;
|
|
|
|
//if (!Controller["P1 B1"]) return 0;
|
|
//if (axis == Axis.XAxis) return xCoord;
|
|
//return yCoord;
|
|
}
|
|
|
|
return SystemRam[address & RamSizeMask];
|
|
}
|
|
|
|
void WriteMemoryTO(ushort address, byte value)
|
|
{
|
|
if (address >= 0xC000)
|
|
SystemRam[address & RamSizeMask] = value;
|
|
else if (address == 0x6000)
|
|
axis = ((value & 1) == 0) ? Axis.XAxis : Axis.YAxis;
|
|
}
|
|
|
|
void InitTerebiOekaki()
|
|
{
|
|
Cpu.ReadMemory = ReadMemoryTO;
|
|
Cpu.WriteMemory = WriteMemoryTO;
|
|
}
|
|
}
|
|
}
|