The 2 registers of REFO4 (Reference clock output 4), from 0xBF8012E0, with their reset value and every field. The PIC32MZ1024ECM100 has 1565 registers in 92 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.