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The C-One is a single-board computer (SBC) created in 2002 as an enhanced version of the Commodore 64, a home computer popular in the 1980s. Designed by Jeri Ellsworth and Jens Schönfeld from Individual Computers, who manufactured the boards themselves, the C-One has been re-engineered to allow cloning of other 8-bit computers.

Design

The machine uses a combination of configurable Altera field-programmable gate array (FPGA) chips and modular CPU expansion cards to create compatibility modes that duplicate the function of many older home computers. The default CPU is the W65C816S (by Western Design Center) which is used in Commodore 64 compatibility mode as well as the C-One's native operating mode. The C-One is not merely a software emulator, it loads various core files from a card to configure the FPGA hardware to recreate the operation of the core logic chipsets found in vintage computers. This provides for a very accurate and customizable hardware emulation platform. The C-One is not limited to recreating historical computers: its programmable core logic can be used to create entirely new custom computer designs.

In 2004, the platform was expanded to include an Amstrad CPC core made by Tobias Gubener.

In 2006, Peter Wendrich ported his FPGA-64 project (originally intended for a Xilinx FPGA) and enhanced it for the C-One.^[1] This core supported both PAL and NTSC machine emulation, and aimed to be cycle-exact and emulate many of the bugs and quirks of the original hardware.

In 2008, after development of an "Extender" card which added a third FPGA, Tobias Gubener added Amiga 500 compatibility by porting Dennis van Weeren's Minimig code to the board.^[2] This core replaced the physical 68000 CPU and the PIC chip from the original with his own TG68 CPU core on the FPGA. Recent^[update] developments to this core include features not possible with the original Minimig board.^[3]

In 2009, Peter Wendrich released a "preview" of a next-generation C64 core called "Chameleon 64", with a greatly expanded specification compared to his earlier core.^[4] A new version of the CPC core was also released in mid-2009, featuring an embedded SymbOS core for control of device emulation, and a clock unlocked mode for CPU speeds of up to 80 MHz.

So far, C-One circuit boards have been produced by German company Individual Computers, and they currently^[update] sell for €333 with the FPGA extender card.

References

^ "Syntiac pages - FPGA-64". Syntiac.com (in Dutch). Retrieved 2016-03-30.
^ "INDIVIDUAL COMPUTERS [ jens schoenfeld ] GMBH". Archived from the original on July 26, 2011. Retrieved September 20, 2010.
^ "C-one". Archived from the original on May 25, 2011. Retrieved September 20, 2010.
^ "Syntiac pages - Turbo Chameleon 64". Syntiac.com (in Dutch). 2013-04-21. Retrieved 2016-03-30.

External links

[1] "Syntiac pages - FPGA-64". Syntiac.com (in Dutch). Retrieved 2016-03-30.

[2] "INDIVIDUAL COMPUTERS [ jens schoenfeld ] GMBH". Archived from the original on July 26, 2011. Retrieved September 20, 2010.

[3] "C-one". Archived from the original on May 25, 2011. Retrieved September 20, 2010.

[4] "Syntiac pages - Turbo Chameleon 64". Syntiac.com (in Dutch). 2013-04-21. Retrieved 2016-03-30.

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@@ Line 1: / Line 1: @@
+{{Short description|Single-board computer}}
-[[Image:C-One motherboard.jpg|400px|thumb|The C-One]]
+{{More citations needed|date=March 2016}}
+[[File:C-One motherboard.jpg|thumb|The C-One]]
-The '''C-One''' is a [[single-board computer]] designed by [[Jeri Ellsworth]], a self-taught designer, and [[Jens Schönfeld]] from [[Individual Computers]], who manufactured the boards themselves.  It was initially created in 2002 as an enhanced [[Commodore 64]] [[home computer]], but has been reengineered to allow cloning of other [[8-bit]] computers.
+The '''C-One''' is a [[single-board computer]] (SBC) created in 2002 as an enhanced version of the [[Commodore 64]], a [[home computer]] popular in the 1980s. Designed by [[Jeri Ellsworth]] and Jens Schönfeld from [[Individual Computers]], who manufactured the boards themselves, the C-One has been re-engineered to allow cloning of other [[8-bit]] computers.
+==Design==
-The machine uses a combination of configurable Field-Programmable Gate Array ([[FPGA]]) chips and modular [[Central processing unit|CPU]] expansion cards to create compatibility modes that duplicate the function of many older [[home computers]].  The default CPU is the [[65816 Microprocessor|65C816 CPU]] which is used in Commodore 64 compatibility mode as well as the C-One's native operating mode. The C-One is not merely a [[software]] [[emulator]], it loads various "core" files from disk to configure the FPGA hardware to recreate the operation of the [[chipset|core logic chipsets]] found in vintage computers.  This provides for a very accurate and customizable hardware emulation platform.  The C-One is by no means limited to recreating historical computers - its programmable core logic can be used to create entirely new custom computer designs.
+The machine uses a combination of configurable [[Altera]] [[field-programmable gate array]] (FPGA) chips and modular [[Central processing unit|CPU]] expansion cards to create compatibility modes that duplicate the function of many older [[home computers]].  The default CPU is the [[WDC 65816/65802|W65C816S]] (by [[Western Design Center]]) which is used in Commodore 64 compatibility mode as well as the C-One's native operating mode. The C-One is not merely a [[software]] [[emulator]], it loads various core files from a card to configure the FPGA hardware to recreate the operation of the [[chipset|core logic chipsets]] found in [[vintage computer]]s.  This provides for a very accurate and customizable hardware emulation platform.  The C-One is not limited to recreating historical computers: its programmable core logic can be used to create entirely new custom computer designs.
-In 2004 the platform was expanded to include an [[Amstrad CPC]] core made by [[Tobias Gubener]].  In 2008 the platform was expanded to include an [[Amiga]] core.  So far, C-One [[circuit board]]s have been produced by [[Germany|German]] company [[Individual Computers]], and they {{As of|2005|alt=currently}} sell for [[Euro|€]]269.
+In 2004, the platform was expanded to include an [[Amstrad CPC]] core made by Tobias Gubener.
-In 2006 a new Commodore-64 core was created by Peter Wendrich. [http://www.syntiac.com/fpga64.html] It is a port of his [[FPGA-64]] project originally targeted for a Xilinx FPGA development kit. This core supports both PAL and NTSC machine emulation. The aim is to make it cycle-exact and emulate many of the bugs and quirks of the original hardware.
+In 2006, Peter Wendrich ported his FPGA-64 project (originally intended for a [[Xilinx]] FPGA) and enhanced it for the C-One.<ref>{{cite web|url=http://www.syntiac.com/fpga64.html |title=Syntiac pages - FPGA-64 |language=nl |website=Syntiac.com |date= |accessdate=2016-03-30}}</ref> This core supported both PAL and NTSC machine emulation, and aimed to be cycle-exact and emulate many of the bugs and quirks of the original hardware.
+In 2008, after development of an "Extender" card which added a third FPGA, Tobias Gubener added [[Amiga 500]] compatibility by porting Dennis van Weeren's [[Minimig]] code to the board.<ref>{{cite web|url=http://www.jschoenfeld.com/news/news133_e.htm |title=INDIVIDUAL COMPUTERS &#91; jens schoenfeld &#93; GMBH |accessdate=September 20, 2010 |url-status=dead |archiveurl=https://web.archive.org/web/20110726112152/http://www.jschoenfeld.com/news/news133_e.htm |archivedate=July 26, 2011 }}</ref> This core replaced the physical 68000 CPU and the PIC chip from the original with his own TG68 CPU core on the FPGA. {{As of|2010|alt=Recent}} developments to this core include features not possible with the original Minimig board.<ref>{{cite web|url=http://www.c64upgra.de/c-one/s_news.htm |title=C-one |accessdate=September 20, 2010 |url-status=dead |archiveurl=https://web.archive.org/web/20110525145239/http://c64upgra.de/c-one/s_news.htm |archivedate=May 25, 2011 }}</ref>
-In August 2006 the Japanese company [http://www.d4e.co.jp/ D4 Enterprise] launched the [[1chipMSX]], a system that is quite similar to the C-One conceptually, but is cheaper as it is much smaller and housed in a transparent plastic enclosure. It sports the [[Altera]] Cyclone EP1C12Q240C8. This system can also emulate many other systems, including the Commodore 64.
+In 2009, Peter Wendrich released a "preview" of a next-generation C64 core called "Chameleon 64", with a greatly expanded specification compared to his earlier core.<ref>{{cite web|url=http://www.syntiac.com/chameleon.html |title=Syntiac pages - Turbo Chameleon 64 |language=nl |website=Syntiac.com |date=2013-04-21 |accessdate=2016-03-30}}</ref> A new version of the CPC core was also released in mid-2009, featuring an embedded [[SymbOS]] core for control of device emulation, and a clock unlocked mode for CPU speeds of up to 80&nbsp;MHz.
-== See also ==
+So far, C-One [[circuit board]]s have been produced by [[Germany|German]] company [[Individual Computers]], and they {{As of|2010|alt=currently}} sell for [[Euro|€]]333 with the FPGA extender card.
+==See also==
 * [[C64 Direct-to-TV]]
 * [[Sprinter (computer)]]
-* [[Home computer remakes]]
+* [[1chipMSX]]
+==References==
-== External links ==
+{{Reflist}}
-*[http://c64upgra.de/c-one/ C-One official home page]
-*[http://c-one.net C-One documentation wiki]
-*[http://particles.org/forum/ Retroputing's forum on the C-One]
-*[http://groups.yahoo.com/group/CommodoreOne/ Yahoo's C-One Group]
-*[http://groups.yahoo.com/group/cone_cores/ Yahoo group for technical discussion about development of cores for the C-One]
+==External links==
-{{Amiga hardware}}
+* {{official website|http://c64upgra.de/c-one/}}
+* [http://wiki.icomp.de/wiki/C-One Wiki]
-{{hardware-stub}}
+* [https://web.archive.org/web/20110118064507/http://www.particles.org/forums/ Retroputing's forum on the C-One]
+* [https://groups.yahoo.com/group/CommodoreOne/ Yahoo's C-One Group]{{dead link|date=December 2023|bot=medic}}{{cbignore|bot=medic}}
+* [https://archive.today/20130209233009/http://groups.yahoo.com/group/cone_cores/ Yahoo group for technical discussion about development of cores for the C-One]
 [[Category:Home computer remakes]]
 [[Category:Microcomputers]]
+[[Category:6502-based home computers]]
 [[Category:Home computers]]
-[[Category:Retrocomputing]]
 [[Category:Commodore 64]]
 [[Category:Amstrad CPC]]
-[[Category:Computing:Reconfigurable]]
+[[Category:Reconfigurable computing]]
+[[Category:Computer-related introductions in 2002]]
-[[de:C-One]]
-[[nl:C1 herconfigureerbare computer]]
-[[sv:C-One]]
-[[pl:C-One]]