Re: on a similar note ...
Ah, that reminds me of the Commodore 64. A family friend had one and I'd go round every weekend. If I'm going to be honest now it's about 30+ years later, I'll admit it was mainly to see the Commodore 64, not them :) . Although I was nice enough to stop playing on their Commodore to actually talk to them. I'd sometimes by a Commodore mag with whatever tape was on the front that I wanted to play. However, I wasn't heavily into it so would go to just see them sometimes.
Anyway. Enough of the back story. Martin, it was his Commodore, had read about using POKE commands to do cheats on a game. The only issue was to do it, you had to interrupt the game loading from tape. The way the article described it (and I was an idiot back then so never understood any of this), you had to touch the exposed board at the back of the Commodore where you'd normally put a cart. But, you had to touch specific pins otherwise it wouldn't work.
I watched him do it, but as always not really paying attention. He got it to work. Nice. He then said he was going out to a friends. I told him I'd stay if that's OK (I cringe now at the memory of how many times I invited myself to events around theirs :) ).
Anyway. While he was out I thought about the POKE commands. Again, being stupid back then I never bothered to look up the article, at least I don't recall looking for it. I just tried to do what he'd done. And then the Commodore turned off!
Turn it back on then......erm, it's not coming back on....erm. Take the power out and put it back in. Nope, still not coming on......oh shit....I think I've broken his Commodore 64.....oh shit.
I'm such an arse I went to the other room and just hung about a bit with his sister as went to school with her, and to make it not obvious I'd just broken the Commodore. Then said "I'm gonna head home now. Probably see you next weekend". Later that night I got the dreaded phone call. "Was the Commodore working when you left?". Oh yes, it was, why what's wrong? "Well it's not turning on".
I never did confess to this day (well until now and other forums I've been on). I'm unaware if he ever knew or found out. I'm sure he suspected me of breaking it. Anyway. He sent it back to whoever it was and it got repaired, I believe free but I'm now thinking he might of actually had to pay for the repair. Although I do remember back then, without me breaking it, he did have to send it off a free times. So I think he'd had other issues with it before I killed it.
Now I'm wiser I discovered I'd cause a short, at least I believe it was. THAT was the danger of doing that type of interrupt to get to do a POKE. If you hit the wrong pins you blew the board.