The 2 registers of REFO1 (Reference clock output 1), from 0xBF801280, with their reset value and every field. The PIC32MZ1024ECH100 has 1554 registers in 91 peripherals, one page each.
Most PIC32 SFRs have three more registers right after them: CLR at +4, SET at +8 and INV at +C (T1CONCLR, T1CONSET, T1CONINV), which clear, set or flip just the bits written as 1, in one write.