Motorola 68881

The Motorola 68881 math coprocessor is a floating-point unit (FPU) that was produced by Motorola's Semiconductor Products Sector for use with the Motorola 68020 processor.Section 1: Generation Description by Motorola, MC68881/MC68882 Floating-Point Coprocessor User's Manual p.1-1. 1987. 
The 68020 can manage up to 8 coprocessors, though no 68k-based Macintosh ever shipped with more than one math coprocessor.Assembly Language Programming with the 68020 by M. Rafiquzzaman, Microprocessor Theory and Applications with 68000/68020 and Pentium p.225. 2008-09-22. The only model to ship with a 68881 pre-installed was the Macintosh II.
The 68881 was succeeded by the Motorola 68882 math coprocessor, which was designed for the 68030 processor with improved pipelining. The 68881 and 68882 are actually interchangeable between the 68020 and 68030, with 10% performance improvement observed in the 68882.Frequently Asked Questions (FAQ) by Robert Boys, comp.sys.m68k. 1996-01-06.
==References==
==External links==
*Motorola 68881 FPU family at CPU-World
*Motorola 68881 at Wikipedia
Category:Motorola hardware