Sharp86's IBus interface

IBus.cs

public interface IBus
{
    byte ReadByte(ushort seg, ushort offset);
    void WriteByte(ushort seg, ushort offset, byte value);
    ushort ReadPortWord(ushort port);
    void WritePortWord(ushort port, ushort value);
    bool IsExecutableSelector(ushort seg);
}