I have two main units.
type computer
country Japan
year 1983
os JR Basic 5.0
cpu MN1800A
speed 1 MHz
ram 32 KB
rom 16 KB
graphic 64×48
colors 8
sound 3 voices, 5 octaves
ports Composite video out, RF video out, RGB video out, Expansion bus, Tape (600/2400 bauds), RS-232c/printer port, External speaker