PiSNES - Controller configuration, save state location

[POPEYE]

1. I am using PiSNES in RPI 1B (under RetroPie 4.0.2), and I would like to disable PiSNES hotkeys (QLOAD and QSAVE).

If I comment them out or leave them blank, or write nul there, then default values (QLOAD=10, QSAVE=9) start to work. What should I write there, to disable QLOAD and QSAVE?

There is some strange values of QUIT and ACCEL (99 and 98). On one internet page I found information, that 99 is hotkey too:
https://www.petrockblock.com/forums/topic/pisnes-controller-configuration-what-the-hell/#post-16142

But that doesn't seem to be true. When I put some other button to quit, it works and Select + Start combination still works too.

There is some strange values of DPAD (LEFT_1=11, RIGHT_1=12, UP_1=13, DOWN_1=14), but in jstest DPAD works as axis (in PiSNES there is axis values too). What the point of PiSNES DPAD values?

2. Where does PiSNES hold save states?