↓ 2 callersFunctiongetHeadquarterPlacementArgsFromCursor0x00434EC7 input: regs.ax = mouseX; regs.bx = mouseY; output (not verified): regs.cx = tileX (tile coordinate) regs.ax = tileY (tile coordinate) regs.
src/OpenLoco/src/Ui/Windows/CompanyWindow.cpp:994