/// <summary>
/// Returns the ROM/RAM enum that relates to this particular memory read operation
/// </summary>
public override ZXSpectrum.CDLResult ReadCDL(ushort addr)
{
var res = new ZXSpectrum.CDLResult();
int divisor = addr / 0x4000;
res.Address = addr % 0x4000;
// paging logic goes here
switch (divisor)
{
case 0: res.Type = ZXSpectrum.CDLType.ROM0; break;
case 1: res.Type = ZXSpectrum.CDLType.RAM0; break;
}
return(res);
}
/// <summary>
/// Returns the ROM/RAM enum that relates to this particular memory read operation
/// </summary>
public override ZXSpectrum.CDLResult ReadCDL(ushort addr)
{
var result = new ZXSpectrum.CDLResult();
int divisor = addr / 0x4000;
result.Address = addr % 0x4000;
// special paging
if (SpecialPagingMode)
{
switch (divisor)
{
case 0:
switch (PagingConfiguration)
{
case 0:
result.Type = ZXSpectrum.CDLType.RAM0;
break;
case 1:
case 2:
case 3:
result.Type = ZXSpectrum.CDLType.RAM4;
break;
}
break;
case 1:
switch (PagingConfiguration)
{
case 0:
result.Type = ZXSpectrum.CDLType.RAM1;
break;
case 1:
case 2:
result.Type = ZXSpectrum.CDLType.RAM5;
break;
case 3:
result.Type = ZXSpectrum.CDLType.RAM7;
break;
}
break;
case 2:
switch (PagingConfiguration)
{
case 0:
result.Type = ZXSpectrum.CDLType.RAM0;
break;
case 1:
case 2:
case 3:
result.Type = ZXSpectrum.CDLType.RAM6;
break;
}
break;
case 3:
switch (PagingConfiguration)
{
case 0:
case 2:
case 3:
result.Type = ZXSpectrum.CDLType.RAM3;
break;
case 1:
result.Type = ZXSpectrum.CDLType.RAM7;
break;
}
break;
}
}
else
{
switch (divisor)
{
// ROM 0x000
case 0:
switch (_ROMpaged)
{
case 0:
result.Type = ZXSpectrum.CDLType.ROM0;
break;
case 1:
result.Type = ZXSpectrum.CDLType.ROM1;
break;
case 2:
result.Type = ZXSpectrum.CDLType.ROM2;
break;
case 3:
result.Type = ZXSpectrum.CDLType.ROM3;
break;
}
break;
// RAM 0x4000 (RAM5 - Bank5 always)
case 1:
result.Type = ZXSpectrum.CDLType.RAM5;
break;
// RAM 0x8000 (RAM2 - Bank2)
case 2:
result.Type = ZXSpectrum.CDLType.RAM2;
break;
// RAM 0xc000 (any ram bank 0 - 7 may be paged in - default bank0)
case 3:
switch (RAMPaged)
{
case 0:
result.Type = ZXSpectrum.CDLType.RAM0;
break;
case 1:
result.Type = ZXSpectrum.CDLType.RAM1;
break;
case 2:
result.Type = ZXSpectrum.CDLType.RAM2;
break;
case 3:
result.Type = ZXSpectrum.CDLType.RAM3;
break;
case 4:
result.Type = ZXSpectrum.CDLType.RAM4;
break;
case 5:
result.Type = ZXSpectrum.CDLType.RAM5;
break;
case 6:
result.Type = ZXSpectrum.CDLType.RAM6;
break;
case 7:
result.Type = ZXSpectrum.CDLType.RAM7;
break;
}
break;
default:
break;
}
}
return(result);
}
