Pal/Console.Dos.cs

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using System.Runtime.CompilerServices;

namespace System
{
    static class Console
    {
        static ushort s_consoleAttribute;
        static ushort s_cursorX, s_cursorY;

        public static unsafe string Title
        {
            set
            {
            }
        }

        public static unsafe bool CursorVisible
        {
            set
            {
            }
        }

        public static ConsoleColor ForegroundColor
        {
            set
            {
                s_consoleAttribute = (ushort)value;
            }
        }


        public static unsafe bool KeyAvailable
        {
            get
            {
                // mov ah,0Bh
                // int 21h
                // ret
                byte* pCode = stackalloc byte[] { 0xB4, 0x0B, 0xCD, 0x21, 0xC3 };
                return ClassConstructorRunner.Call<byte>(new IntPtr(pCode)) != 0;
            }
        }

        public static unsafe ConsoleKeyInfo ReadKey(bool intercept)
        {
            // mov ah,08h
            // int 21h
            // ret
            byte* pCode = stackalloc byte[] { 0xB4, 0x08, 0xCD, 0x21, 0xC3 };
            char c = (char)ClassConstructorRunner.Call<byte>(new IntPtr(pCode));

            // Interpret WASD as arrow keys.
            ConsoleKey k = default;
            if (c == 'w')
                k = ConsoleKey.UpArrow;
            else if (c == 'd')
                k = ConsoleKey.RightArrow;
            else if (c == 's')
                k = ConsoleKey.DownArrow;