Enables sprite limiting and masking. Disables sprite limiting and masking. Auto-detects which country the ROM can operate in and sets the Genesis version register appropriately. If a game does not work, try playing with horizontal interrupts and the Z80. A lot of games can't be run because of flaws in Genital's emulation.
Many games are buggy.
The Genital Save State format is recommended over the Genecyst format because it is much more reliable. You can find it at my site. The Sega Genesis debugger is arguably Genital's coolest feature. Most of it should be self-explanatory. The m command will modify RAM and registers on the address space.