Preloader (initial software) Group Register Descriptions Registers used by preloader code and the OS. All registers are only reset by a cold reset (ignore warm reset). Offset: 0x80 handoff These registers are used to store handoff infomation between the preloader and the OS. These 8 registers can be used to store any information. The contents of these registers have no impact on the state of the HPS hardware. For more information on the handoff registers click here.