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Encyclopedia > Freescale ColdFire

The Freescale ColdFire is a 68k architecture microprocessor manufactured for embedded systems development by Freescale Semiconductor (formerly the semiconductor sector of Motorola). The Motorola 680x0/0x0/m68k/68k/68K family of CISC microprocessor CPU chips were 32-bit from the start, and were the primary competition for the Intel x86 family of chips. ... A microprocessor (sometimes abbreviated µP) is a digital electronic component with transistors on a single semiconductor integrated circuit (IC). ... To meet Wikipedias quality standards, this article may require cleanup. ... Freescale Semiconductor, Inc. ... Motorola (NYSE: MOT) is an American international communications company based in Schaumburg, Illinois, a Chicago suburb. ...


The ColdFire instruction set is "assembly source" compatible (by means of translation software available from the vendor) and not entirely object code compatible with the 68000. When compared to classic 68k hardware, the instruction set differs mainly in that it no longer has support for the Binary Coded Decimal, or BCD packed data format; it removes a number of other, less used instructions; and most instructions that are kept support fewer addressing modes. Presumably this results in a simpler and lower cost instruction decoder. Also, floating point intermediates are 64 bits and not 80 bits as in the 68881 and 68882. The Motorola 68000 is a CISC microprocessor, the first member of a successful family of microprocessors from Motorola, which were all mostly software compatible. ... This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... The Motorola 68881 was a floating-point coprocessor chip that was utilized in some computer systems that used the 68020 or 68030 CPU. The addition of the 68881 chip added substantial cost to the computer, but added a floating point unit that could rapidly perform floating point math calculations. ... The Motorola 68881 was a floating-point coprocessor chip that was utilized in some computer systems that used the 68020 or 68030 CPU. The addition of the 68881 chip added substantial cost to the computer, but added a floating point unit that could rapidly perform floating point math calculations. ...


Newer models of ColdFire are compatible enough with 68k processors that it is now possible to create binary compatible Amiga clones. The Debian project is currently working on making its m68k port compatible with the ColdFires, as there are ColdFires models that are much faster than the 68060 (they can be clocked as high as 266MHz, compared to the 60MHz you can get from a 68060 without overclocking), the fastest "real" m68k processor. The Motorola 680x0/0x0/m68k/68k/68K family of CISC microprocessor CPU chips were 32-bit from the start, and were the primary competition for the Intel x86 family of chips. ... The original Amiga 1000 (1985) with Commodore 1080 monitor The Amiga is a family of home/personal computers originally developed by Amiga Corporation as an advanced home entertainment and productivity machine. ... Debian, organized by the Debian Project, is a widely used distribution of free software developed through the collaboration of volunteers from around the world. ... The Motorola 68060 is a 32-bit microprocessor from Motorola, and is the successor to the Motorola 68040. ... AMD Athlon XP Overclocking BIOS Setup on ABIT NF7-S. FSB frequency has increased from 133MHz to 148MHz, and clock multiplier factor has changed from x13. ...


External links

  • Freescale Semiconductor's Official ColdFire Site
  • Original announcement of ColdFire based Amiga clone and FAQ about it
  • The eCos and RTEMS open source real-time operating systems.
List of Motorola/Freescale microprocessors
The 6800 family : 6809 (see also: Hitachi 6309)
68000 family : 68000 | 68008 | 68010 | 68012 | 68020 | 68030 | 68040 | 68060 | ColdFire | DragonBall
Low-cost variants: 68EC000 | 68EC020 | 68EC030 | 68EC040 | 68LC040
Pre-PowerPC RISC : 88000
Floating-point coprocessors : 68881, 68882
PowerPC family (as part of AIM) : PPC 7XX range (aka "PowerPC G3") | PPC 7XXX range (aka "PowerPC G4")

 
 

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