public void Reset()
{
_interrupts = new ConcurrentQueue <byte>();
_bus = new i8086BusInterfaceUnit();
_bus.LoadBIOS(File.ReadAllBytes("Chipset\\pcxtbios.bin"));
//_bus.LoadROM(File.ReadAllBytes("Chipset\\ide_xt.bin"), 0xd0000);
//_bus.LoadROM(File.ReadAllBytes("Chipset\\rombasic.bin"), 0xf6000);
//_bus.LoadROM(File.ReadAllBytes("Chipset\\videorom.bin"), 0xc0000);
_eu = new i8086ExecutionUnit(_bus);
// 0x00 - 0x0f: DMA Chip 8237A-5
// 0x20 - 0x21: Interrupt 8259A
Init8259();
// 0x40 - 0x43: Timer 8253
Init8253();
// 0x60 - 0x63: PPI 8255 (speaker)
// 0x80 - 0x83: DMA page registers
// 0xa0 - 0xaf: NMI Mask Register
// 0x200 - 0x20f: Game Control
// 0x210 - 0x207: Expansion Unit
// 0x220 - 0x24f: Reserved
// 0x3bc: IBM Monochrome Display & Printer Adapter
// 0x378: Printer Adapter
}
public i8086ExecutionUnit(i8086BusInterfaceUnit bus)
{
_bus = bus;
Halted = false;
_inputDevices = new Dictionary<int, IInputDevice>();
_outputDevices = new Dictionary<int, IOutputDevice>();
InitOpCodeTable();
}
public void TestInit()
{
i8086BusInterfaceUnit bus = new i8086BusInterfaceUnit(0, 0, new byte[] { 0x05, 0x10, 0x15 });
int i = 0;
Assert.AreEqual(0x05, bus.NextIP(), string.Format("NextIP failed {0}",i++));
Assert.AreEqual(0x10, bus.NextIP(), string.Format("NextIP failed {0}", i++));
Assert.AreEqual(0x15, bus.NextIP(), string.Format("NextIP failed {0}", i++));
bus = new i8086BusInterfaceUnit(0x100, 0x200, new byte[] { 0x20, 0x25, 0x30 });
Assert.AreEqual(0x20, bus.NextIP(), string.Format("NextIP failed {0}", i++));
Assert.AreEqual(0x25, bus.NextIP(), string.Format("NextIP failed {0}", i++));
Assert.AreEqual(0x30, bus.NextIP(), string.Format("NextIP failed {0}", i++));
}
public void TestGetAndSave()
{
i8086BusInterfaceUnit bus = new i8086BusInterfaceUnit(0x100, 0x200, new byte[] { 0x05, 0x10, 0x15 });
byte offset = 0x05;
byte value8 = 0xaa;
ushort value16 = 0x5f02;
bus.DS = 0x300;
bus.SaveData8(offset, value8);
Assert.AreEqual(value8, bus.GetData8(offset), "GetData8 failed");
bus.SaveData16(offset + 1, value16);
Assert.AreEqual(value16, bus.GetData16(offset + 1), "GetData16 failed");
}
public void Boot(byte[] program)
{
// For now we will hard code the BIOS to start at a particular code segment.
_bus = new i8086BusInterfaceUnit(0x0000, 0x0100, program);
_eu = new i8086ExecutionUnit(_bus);
}
public void Reset()
{
_interrupts = new ConcurrentQueue<byte>();
_bus = new i8086BusInterfaceUnit();
_bus.LoadBIOS(File.ReadAllBytes("Chipset\\pcxtbios.bin"));
//_bus.LoadROM(File.ReadAllBytes("Chipset\\ide_xt.bin"), 0xd0000);
//_bus.LoadROM(File.ReadAllBytes("Chipset\\rombasic.bin"), 0xf6000);
//_bus.LoadROM(File.ReadAllBytes("Chipset\\videorom.bin"), 0xc0000);
_eu = new i8086ExecutionUnit(_bus);
// 0x00 - 0x0f: DMA Chip 8237A-5
// 0x20 - 0x21: Interrupt 8259A
Init8259();
// 0x40 - 0x43: Timer 8253
Init8253();
// 0x60 - 0x63: PPI 8255 (speaker)
// 0x80 - 0x83: DMA page registers
// 0xa0 - 0xaf: NMI Mask Register
// 0x200 - 0x20f: Game Control
// 0x210 - 0x207: Expansion Unit
// 0x220 - 0x24f: Reserved
// 0x3bc: IBM Monochrome Display & Printer Adapter
// 0x378: Printer Adapter
}
public void Boot(byte[] program)
{
// For now we will hard code the BIOS to start at a particular code segment.
_bus = new i8086BusInterfaceUnit(0x0000, 0x0100, program);
_eu = new i8086ExecutionUnit(_bus);
}
