Messei 1.0 is a free MSX1 emultaor for Windows, outstanding for its versatility and operability.
These are some of its characteristics: very faithful emulation of Z80 and PSG, precise Scanline emulation of VDP, support for the majority of ROM mappers known, keyboard emulation, Arkanoid joystick and pad, operability to render Direct3D and DirectDraw, NTSC simulation (mixed/s-video/mono), change PAL to NTSC (and vice versa) etc.