Mega Kid MK-1000
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It has a composite video output and a mono audio output, as well as a rather crude RF modulator antenna output, unfiltered (the output appears on several TV channels) and unshielded from interferences.
In its box is contained a Famicom cartridge containing several NES applications that work with the keyboard, such as crude word processors, keyboard exercises, mathematical games, G-BASIC and a handful of first generation NES games such as F-1 Race, Track & Field and "Jewel Tetris". This cartridge also contains an additional 64 K static RAM chip, mainly for use with the provided G-BASIC, a dialect of the BASIC programming language designed for the NES. However, no CMOS backup memory is provided, so any typed-in program or text will be lost upon rebooting or switching the power off.