If I remember right I was told back in the early 70s by our IBM CE that physical damage could be done to our model 30 or 40 if we ran a program that did an Assembler instruction, B * For those non-Assembler people that is an instruction to branch to the location of the instruction. I think it might have caused a heat problem in the core or CCROS or TROS.
Possible? Or is my 76 year old brain hallucinating?