Sharp MZ-800 - Computer (1)

Found while tidying up my home office.
Sharp MZ800, intended as a replacement for my Sinclair ZX Spectrum, but never used.
It should still work, but there is no time to test the device.

General information about the device:
The MZ800 series replaces the MZ700 towards the end of 1984. These computers are compatible with the predecessors of the MZ700 and MZ80 series, but they boast new features. Especially in graphics and sound, a lot has happened: the graphic resolution has doubled (if you extend the screen memory, up to 4 colors are possible at the highest resolution) and the MZ800 can now produce three-voice tones. Also, S-BASIC has been greatly expanded and now occupies over 40 kB.