sf 7000 on mame

 run with mame64 sf7000 -flop diskbasic.zip

if the keyboard does not work then scroll-lock,tab,keyboard mode and set it "enabled"

to connect the printer

mame sc3000 -cart ~/emu/rom/Sega_BASIC_Level_3_V1_\(SC-3000\).sc -window -sgexp:sk1100:printer sp400

where the last option can be looked up using

mame sc3000  -listslots