Comparing C64 to CPC - Revision history

Phi2x at 03:15, 30 April 2025

2025-04-30T03:15:47Z

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	== Comparing CPC and C64 ==		== Comparing [[CPC]] and [[C64]] ==

	* The C64 was released in 1982, the CPC released in 1984.		* The C64 was released in 1982, the CPC released in 1984.

Phi2x: /* Comparing CPC and C64 */

2025-04-30T03:02:55Z

Comparing CPC and C64

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	* The C64 has the VIC [[ASIC]] video chip. The CPC has the [[COTS]] [[6845 CRTC]] and an [[ASIC]] Gate-Array.		* The C64 has the VIC [[ASIC]] video chip. The CPC has the [[COTS]] [[6845 CRTC]] and an [[ASIC]] Gate-Array.

	* The CPC is made from chips purchased from various ~~suppliers~~, while the C64 only uses MOS chips. Demos have serious [[CRTC]] compatibility issues on CPC while such problems don't really exist on C64, except for the PAL/NTSC split.		* The CPC is made from chips purchased from various manufacturers, while the C64 only uses MOS chips. Demos have serious [[CRTC]] compatibility issues on CPC while such problems don't really exist on C64, except for the PAL/NTSC split.

	* The C64 tape loading is done through interrupts so is not intensive on the CPU. The CPC tape loading is very intensive on the CPU.		* The C64 tape loading is done through interrupts so is not intensive on the CPU. The CPC tape loading is very intensive on the CPU.

Phi2x at 03:01, 30 April 2025

2025-04-30T03:01:36Z

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	* The C64 has the VIC [[ASIC]] video chip. The CPC has the [[COTS]] [[6845 CRTC]] and an [[ASIC]] Gate-Array.		* The C64 has the VIC [[ASIC]] video chip. The CPC has the [[COTS]] [[6845 CRTC]] and an [[ASIC]] Gate-Array.

			* The CPC is made from chips purchased from various suppliers, while the C64 only uses MOS chips. Demos have serious [[CRTC]] compatibility issues on CPC while such problems don't really exist on C64, except for the PAL/NTSC split.

	* The C64 tape loading is done through interrupts so is not intensive on the CPU. The CPC tape loading is very intensive on the CPU.		* The C64 tape loading is done through interrupts so is not intensive on the CPU. The CPC tape loading is very intensive on the CPU.
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	* The CPC can do overscan easily and any pixels can be shown, the C64 can do overscan too, vertically can be done using interrupts but horizontally is processor intensive and only sprites can be displayed in this area.		* The CPC can do overscan easily and any pixels can be shown, the C64 can do overscan too, vertically can be done using interrupts but horizontally is processor intensive and only sprites can be displayed in this area.

	* The CPC is made from chips purchased from various suppliers, while the C64 only uses MOS chips. Demos have serious [[CRTC]] compatibility issues on CPC while such problems don't really exist on C64, except for the PAL/NTSC split.

	==Palette comparison==		==Palette comparison==

Phi2x at 03:00, 30 April 2025

2025-04-30T03:00:40Z

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	* The CPC can do overscan easily and any pixels can be shown, the C64 can do overscan too, vertically can be done using interrupts but horizontally is processor intensive and only sprites can be displayed in this area.		* The CPC can do overscan easily and any pixels can be shown, the C64 can do overscan too, vertically can be done using interrupts but horizontally is processor intensive and only sprites can be displayed in this area.

			* The CPC is made from chips purchased from various suppliers, while the C64 only uses MOS chips. Demos have serious [[CRTC]] compatibility issues on CPC while such problems don't really exist on C64, except for the PAL/NTSC split.

	==Palette comparison==		==Palette comparison==

Phi2x: /* Links */

2025-04-25T13:00:08Z

Links

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	*[https://www.pepto.de/projects/colorvic/ Calculating the color palette of the VIC-II] [https://www.colodore.com/ Colodore]		*[https://www.pepto.de/projects/colorvic/ Calculating the color palette of the VIC-II] [https://www.colodore.com/ Colodore]
			*[https://hitmen.c02.at/temp/palstuff/ Accurately reproducing the Video Output of a Commodore C64]
	*[https://ilesj.wordpress.com/2016/03/30/old-vic-ii-colors-and-color-blending/ Distinction between old VIC-II and new VIC-II color palette]		*[https://ilesj.wordpress.com/2016/03/30/old-vic-ii-colors-and-color-blending/ Distinction between old VIC-II and new VIC-II color palette]

Phi2x: /* Links */

2025-04-25T12:32:49Z

Links

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	== Links ==		== Links ==

	*[https://www.pepto.de/projects/colorvic/ Calculating the color palette of the VIC-II]		*[https://www.pepto.de/projects/colorvic/ Calculating the color palette of the VIC-II] [https://www.colodore.com/ Colodore]
	*[https://ilesj.wordpress.com/2016/03/30/old-vic-ii-colors-and-color-blending/ Distinction between old VIC-II and new VIC-II color palette]		*[https://ilesj.wordpress.com/2016/03/30/old-vic-ii-colors-and-color-blending/ Distinction between old VIC-II and new VIC-II color palette]

Phi2x: /* Sprite Comparisons */

2025-01-11T09:00:58Z

Sprite Comparisons

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	* Sprite data is stored in on-board ASIC RAM.		* Sprite data is stored in on-board ASIC RAM.

			[[Category:CrossDev]][[Category:CPC History]][[Category:Non CPC Computers]]

	[~~[Category~~:~~CrossDev]~~][~~[Category~~:~~CPC History]][[Category:Non CPC Computers]~~]		== Links ==

			*[https://www.pepto.de/projects/colorvic/ Calculating the color palette of the VIC-II]
			*[https://ilesj.wordpress.com/2016/03/30/old-vic-ii-colors-and-color-blending/ Distinction between old VIC-II and new VIC-II color palette]

Phi2x: /* Palette comparison */

2025-01-11T08:55:21Z

Palette comparison

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	The Amstrad's palette however is lacking in browns and greys. The colours themselves are consistent between machines.		The Amstrad's palette however is lacking in browns and greys. The colours themselves are consistent between machines.

	The C64 has a palette of 16 colours. The colours were chosen by the designers. It has a couple of greys and some browns.		The C64 has a palette of 16 colours. The colours were chosen by the designers. It has a couple of greys and some browns. Both the CPC and the C64 have a good range of colours that can produce great pictures.
	~~The colours appear different on NTSC and PAL due to~~ the ~~way these transmit their colour signals,~~ and ~~in addition~~ the ~~colour is not always the same between machines~~.

	~~Both have~~ a ~~good range of colours that can produce great pictures~~.		The colours appear different on NTSC and PAL due to the way these transmit their colour signals, and in addition the colour is not always the same between machines. Only the C64 PAL has the infamous brownish palette. The C64 NTSC has a more vibrant colour palette.

	[[File:Colors.png]]		[[File:Colors.png]]

Phi2x: /* How color fades are done on the C64 */

2025-01-11T08:39:52Z

How color fades are done on the C64

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	[[File:Commodore 64 color fade algorithm.png\|800px]]		[[File:Commodore 64 color fade algorithm.png\|800px]]

			The C64 demogroup Oxyron produced the most exhaustive [[Media:C64 Colfade v2.pdf\|color fade documentation]] to any color.

	==Comparison of the SID and AY-3-8912==		==Comparison of the SID and AY-3-8912==

Phi2x: /* Palette comparison */

2025-01-11T08:23:11Z

Palette comparison

← Older revision		Revision as of 08:23, 11 January 2025
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	[[File:Test gris CPC.png]]		[[File:Test gris CPC.png]]

			==How color fades are done on the C64==

			[[File:Commodore 64 color fade algorithm.png\|800px]]

	==Comparison of the SID and AY-3-8912==		==Comparison of the SID and AY-3-8912==