private Scheduler.Task task;// = new TaskSC(this);
public RTC(X8086 cpu, InterruptRequest irq)
{
task = new TaskSC(this);
this.irq = irq;
for (int i = 0x70; i <= 0x71; i++)
{
ValidPortAddress.Add((uint)i);
}
for (int i = 0x240; i <= 0x24F; i++)
{
ValidPortAddress.Add((uint)i);
}
// FIXME: Although this works, when pausing the emulation causes the internal timers to get out of sync:
// The contents at 46C no longer reflect what's returned by INT 1A, 02
// So the x8086.Resume method should perform a re-sync setting the new tick values into 46C.
// It also appears that the x8086.Resume method should also advance the time...
cpu.TryAttachHook((byte)(0x8), new X8086.IntHandler(() =>
{
uint ticks = (uint)((DateTime.Now - new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, 0, 0, 0)).Ticks / 10000000 * 18.206);
//cpu.RAM16[0x40, 0x6E] = (ticks >> 16) & 0xFFFF;
//cpu.RAM16[0x40, 0x6C] = ticks & 0xFFFF;
//cpu.RAM8[0x40, 0x70] = 0;
cpu.set_RAM16(0x40, 0x6E, 0x0, false, (ushort)((long)(ticks >> 16) & 0xFFFF));
cpu.set_RAM16(0x40, 0x6C, 0x0, false, (ushort)((long)(ticks) & 0xFFFF));
cpu.set_RAM8(0x40, 0x70, 0x0, false, 0x00);
cpu.TryDetachHook(0x8);
return(false);
}));
cpu.TryAttachHook((byte)(0x1A), new X8086.IntHandler(() =>
{
switch (cpu.Registers.AH)
{
case 0x2: // Read real time clock time
cpu.Registers.CH = (byte)ToBCD((ushort)DateTime.Now.Hour);
cpu.Registers.CL = (byte)ToBCD((ushort)DateTime.Now.Minute);
cpu.Registers.DH = (byte)ToBCD((ushort)DateTime.Now.Second);
cpu.Registers.DL = 0;
cpu.Flags.CF = 0;
return(true);
case 0x4: // Read real time clock date
cpu.Registers.CH = (byte)ToBCD((ushort)(DateTime.Now.Year / 100));
cpu.Registers.CL = (byte)ToBCD((ushort)DateTime.Now.Year);
cpu.Registers.DH = (byte)ToBCD((ushort)DateTime.Now.Month);
cpu.Registers.DL = (byte)ToBCD((ushort)DateTime.Now.Day);
cpu.Flags.CF = 0;
return(true);
default:
return(false);
}
}));
}