§14 Mantissa/exponent composed value: value = mantissa * base^exponent.
base MUST NOT be zero (MDE406). Sub-mapping offsets are word offsets
relative to the point's mapped window. Mantissa and exponent may address
separate registers, or window the SAME word(s) via bit_offset/bit_length
(v0.5 — embedded decade exponent, e.g. Iskra T5/T6, Eaton PXM).
§14 Mantissa/exponent composed value: value = mantissa * base^exponent.
baseMUST NOT be zero (MDE406). Sub-mapping offsets are word offsets relative to the point's mapped window. Mantissa and exponent may address separate registers, or window the SAME word(s) via bit_offset/bit_length (v0.5 — embedded decade exponent, e.g. Iskra T5/T6, Eaton PXM).