Videoton TV Computer is a Z80 based, 8 bit computer. The emulation is extremly primitve, lacking for example:

• Sound
• Exact timing
• Most of the interrupt generation possibilities ...
• No CRTC emulation at all, blindly do just the defaults always ...
• No storage support (disk, tape, whatever ...)
• Only model 64+ is tried to be emulated
• No video RAM "clock stretching" is emulated
• No cards and associated features (memory and I/O regions, etc) are emulated
• Keyboard mapping is lame and not complete

Etc, you can find some more :) Basically now it's enough to "turn it on" see the logo and try to type something in BASIC, that's all :-)