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NextREG

NextREG panel

All 256 NextREG registers with a name for the ones JNEXT knows about, and the value in both hex and binary.

The Hex column is editable: type a new value and it is written to the register exactly as NEXTREG nn,n would write it, with all the side effects that implies. The values shown are the live values composed by the hardware, not merely the last byte written — so a Layer 2 enable set through port 0x123B correctly shows up in NR 0x69.

While an RZX recording or playback is running, an edit is refused: a register write the recording does not contain would make its replay go wrong. The cell shows the register's real value again at the next refresh.