My abiding memory of typing in listings on my TI-99/4a is how often I intended to type shift-equals to get '+' but instead hit function-equals, which reset the

My abiding memory of typing in listings on my TI-99/4a is how often I intended to type shift-equals to get '+' but instead hit function-equals, which reset the machine and lost all my work since I last saved (and since it was saving to tape, I didn't save all that frequently...)