Preliminary research! Do not pay much attention to this.
0x9A - Matrix letter input dialog
0x197 - makes emulator screen become quite dark. called on PowerOff and Restart.
0x8E8 - InputDateDialog
0x8E9 - InputMonthDialog
0x8EA - InputDayDialog
0x8EB - InputYearDialog
0x183C - makes emulator screen go completely black. OS keeps running fine behind it. Emulator reboots will not bring the screen back on. Called on PowerOff.