SNES Powerpak is now available

[Troglodyte]

Perhaps it requires a certain version of the lockout chip.

That doesn't seem to make much sense to me, in Jeopardy!'s case, as the game boots up and runs?
Wouldn't it just check for the lockout chip once, at boot time, and then
refuse to run at all? Rather than just run, but with graphical problems.

Because padding the ROM is essentially the same as mirroring.

I think I understand now; you must be referring to memory bank mirroring or something along those lines. I speculated earlier that the Jeopardy! game used a different method of reading and writing to the memory here:

I assume, but have no way of confirming, that the Hi-Res mode trick, changes the way the memory addressing / speed of accessing the RAM is achieved.

However, what I still would like to understand, is how you know that this game does in fact use mirroring, and why it does it. In other words, what advantages do it give to an SNES game developer?

I'm not attacking your knowledge at all, I am just a person that has always been interested in low level hardware / software tricks. I guess it is because I come from a Computer science background, and have always been interested in electronics and programing since a very young age.