Sounds like what you want is a TRS-80 model 100: https://en.wikipedia.org/wiki/TRS-80_Model_100 https://en.wikipedia.org/wiki/TRS-80_Model_100 Though maybe it

Sounds like what you want is a TRS-80 model 100: https://en.wikipedia.org/wiki/TRS-80_Model_100 https://en.wikipedia.org/wiki/TRS-80_Model_100 Though maybe it's not quite as light as you were hoping (at least, not by modern standards)