// read with io
public int Read(int address)
{
var page = (address & 0xF000) >> 12;
switch (page)
{
case 0x0A:
if (address >= 0xA000 && address < 0xA7C0)
{
return(_floppyRom[address & 0x7FF]);
}
switch (address)
{
case 0xA7C0:
const int tapeDrivePresent = 0x80;
return(_ports[0] | tapeDrivePresent | (_input.LightPenClick ? 0x20 : 0));
case 0xA7C1:
return(_ports[1] | (_input.IsKeyPressed((Mo5Key)(_ports[1] & 0xFE)) ? 0 : 0x80));
case 0xA7C2:
return(_ports[2]);
case 0xA7C3:
return(_ports[3] | ~_machine.Initn());
case 0xA7CB:
return((_carflags & 0x3F) | ((_carflags & 0x80) >> 1) | ((_carflags & 0x40) << 1));
case 0xA7CC:
return(((_ports[0x0E] & 4) != 0) ? JoystickPosition : _ports[0x0C]);
case 0xA7CD:
return(((_ports[0x0F] & 4) != 0) ? JoystickAction | SoundMem : _ports[0x0D]);
case 0xA7CE:
return(4);
case 0xA7D8:
return(~_machine.Initn());
case 0xA7E1: return(0xFF); //0 means printer error #53
case 0xA7E6: return(_machine.Iniln() << 1);
case 0xA7E7: return(_machine.Initn());
default:
if (address < 0xA800)
{
return(_ports[address & 0x3F]);
}
return(0);
}
case 0x0B:
SwitchMemo5Bank(address);
return(_mem[_mapper[page]][address & 0xFFF] & 0xFF);
default:
return(_mem[_mapper[page]][address & 0xFFF] & 0xFF);
}
}
