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Created page with 'In programation, the raster is often referred as the act to modify the setting of inks between 2 scanlines. This is a way to display more than the usual [[Video modes]] number o…'
In programation, the raster is often referred as the act to modify the setting of inks between 2 scanlines.
This is a way to display more than the usual [[Video modes]] number of colours.
The time between the display of 2 Scanlines by the CRTC allow the CPU to order the Gate array to modify the setting of inks.
The screen display at 50Hz...The [[CPU]] ([[Z80]]) runs at about 4 MgHz.
So It has enough cycles between 2 scanlines to order this.
You can also use Split rasterto "actually" display 2 different screens, sometoimes with different Video Modes.
==Links==
*[http://en.wikipedia.org/wiki/Raster Wikipedia link to Raster concepts]
==CPCWiki Links==
*[[Gate Array]]
*[[CRTC]]
*[[ASIC]]
*[[Synchronising with the CRTC and display]]
*[[Programming:Simple Raster Example 1]]
*[[Programming:Simple Raster Example 2 (uses CPC plus features)]]
*[[Programming:Simple Raster Example 3 (uses CPC plus features)]]
*[[Programming:Simple Split Raster Example 1]]
[[Category:Graphic]][[Category:Programming]][[Category:Stub]]
This is a way to display more than the usual [[Video modes]] number of colours.
The time between the display of 2 Scanlines by the CRTC allow the CPU to order the Gate array to modify the setting of inks.
The screen display at 50Hz...The [[CPU]] ([[Z80]]) runs at about 4 MgHz.
So It has enough cycles between 2 scanlines to order this.
You can also use Split rasterto "actually" display 2 different screens, sometoimes with different Video Modes.
==Links==
*[http://en.wikipedia.org/wiki/Raster Wikipedia link to Raster concepts]
==CPCWiki Links==
*[[Gate Array]]
*[[CRTC]]
*[[ASIC]]
*[[Synchronising with the CRTC and display]]
*[[Programming:Simple Raster Example 1]]
*[[Programming:Simple Raster Example 2 (uses CPC plus features)]]
*[[Programming:Simple Raster Example 3 (uses CPC plus features)]]
*[[Programming:Simple Split Raster Example 1]]
[[Category:Graphic]][[Category:Programming]][[Category:Stub]]
