Before revision: Architecture Die of Motorola 68881 The 68881 has eight 80-bit data URL (a 64-bit mantissa plus a sign bit, and a 15-bit signed exponent).
After revision: Architecture Die of Motorola 68881 The 68881 has eight 80-bit data registers (a 64-bit mantissa plus a sign bit, and a 15-bit signed exponent).