Install fbzx by entering the following commands in the terminal:
sudo apt update sudo apt install fbzx
Description:
ZX Spectrum emulator
FBZX is a Sinclair ZX Spectrum emulator for Linux/Unix. It can work over X or in a FrameBuffer console.
Homepage: http://www.rastersoft.com/fbzx.html
Version: 3.1.0-1
Section: multiverse/otherosfs