void DSKCHG_GETDPB(bool checkFileChanged)
{
var driveNumber = z80.Registers.A;
z80.Registers.CF = 1;
if (driveNumber != 0)
{
z80.Registers.A = 2;
return;
}
CheckForUsbChanges();
if (!DeviceAvailable)
{
z80.Registers.A = 12;
return;
}
z80.Registers.A = 0;
var diskChanged = false;
if (checkFileChanged)
{
diskChanged = CheckDiskChanged(out byte errorCode);
if (errorCode != 0)
{
z80.Registers.A = errorCode;
z80.Registers.CF = 1;
return;
}
z80.Registers.B = (byte)(diskChanged ? -1 : 1);
}
if (diskChanged || dpb == null)
{
dpb = GenerateDpb(out byte errorCode);
if (errorCode != 0)
{
z80.Registers.A = errorCode;
z80.Registers.CF = 1;
return;
}
}
memory.SetContents(z80.Registers.HL + 1, dpb);
z80.Registers.CF = 0;
}
