Motorola 68040
The 68040 is a microprocessor from Motorola. It is the successor to the Motorola 68030 and is followed by the Motorola 68060 (the 68050 was a failure and never shipped).
The 68040 is the first 680x0 family member with an on-chip FPU (floating point unit). It thus includes all of the functionality that previously required external chips, namely the FPU and MMU (which was added in the 030). It also has split instruction and data caches of 4 kilobytes each. It is fully pipelined, with six stages.
Versions of the '040' were created for specific market segments, including the 68LC040 which removed the FPU, and the 68EC040 which removed both the FPU and MMU. Various versions were used in the Amiga and Apple Macintosh Quadra series of personal computers, as well as being used in a number of Workstations and later versions of the NeXT computers.
For more information on the instructions and architecture, see Motorola 68000.
Note:
In keeping with general Motorola naming, this CPU is often referred to as the 040.
This article (or an earlier version of it) contains material from FOLDOC, used with permission.
Referenced By
68000 | 68000 family | 68030 | 68050 | 68060 | 680x0 | 68LC040 | A4000 | Amiga | Amiga keyboard | Atari ST | Centris | Commodore Amiga | List of Macintosh models grouped by CPU | List of computing topics | M68000 | M68k | MC68000 | Mac II series | Macintosh Centris | Macintosh II series | Macintosh Quadra | Motorola 68000 | Motorola 68000 family | Motorola 68030 | Motorola 68050 | Motorola 68060 | Motorola 68EC040 | Motorola 68LC040 | Motorola 68k | NeXT | NeXT Computer | Quadra
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