## Future expansion.
With the way that EXTRA fields are defined and applied to register fields,
-future versions of SV may involve 256 or greater registers. To accommodate 256 registers, numbering of Vectors will simply shift up by one bit. Backwards bibary compatibility may be achieved with a PCR bit. Beyond this, further discussion is out of scope for this version of svp64.
+future versions of SV may involve 256 or greater registers. To accommodate 256 registers, numbering of Vectors will simply shift up by one bit, without
+requiring additional prefix bits. Backwards binary compatibility may be achieved with a PCR bit (Program Compatibility Register). Beyond this, further discussion is out of scope for this version of svp64.
# Remapped Encoding (`RM[0:23]`)