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- Vertical_blank_interrupt abstract "A vertical blank interrupt (or VBI) is a hardware feature found in some computer systems that generate a video display. Typical video display circuits generate vertical blanking and vertical sync' pulses when the display picture has completed and the raster is being returned to the start of the display. With VBI, the vertical blank pulse is also used to generate an interrupt request for the computer's microprocessor.The interrupt service routine can then run specific display or graphics software to modify data in the video display memory while it is not being read. This was particularly useful in simple home computers and video game consoles that relied upon a central microprocessor to generate text or graphic displays.As the VBI will be generated at the start of every displayed frame (50 Hz for PAL, 60 Hz for NTSC), it is also a useful timebase in systems lacking an interrupt from a programmable or fixed interval timer. Regular software functions like scanning a keyboard, reading a joystick or maintaining a time or date measurement can be carried out. This can also be used to implement a basic form of multitasking.The VBI is particularly useful if the display hardware includes some sort of page flipping support, in which case the hardware can be set up to draw a new frame during the period where there is no drawing taking place.A VBI was implemented on the Atari 8-bit family, whose ANTIC display chip included a register pointing to the start of the display memory. The main program would draw the new frame into a buffer in memory and the VBI service routine would change the ANTIC register.".
- Vertical_blank_interrupt wikiPageID "147550".
- Vertical_blank_interrupt wikiPageLength "1889".
- Vertical_blank_interrupt wikiPageOutDegree "14".
- Vertical_blank_interrupt wikiPageRevisionID "636655601".
- Vertical_blank_interrupt wikiPageWikiLink Atari_8-bit_family.
- Vertical_blank_interrupt wikiPageWikiLink Category:Video_game_development.
- Vertical_blank_interrupt wikiPageWikiLink Computer_multitasking.
- Vertical_blank_interrupt wikiPageWikiLink Framebuffer.
- Vertical_blank_interrupt wikiPageWikiLink Home_computer.
- Vertical_blank_interrupt wikiPageWikiLink Horizontal_blank_interrupt.
- Vertical_blank_interrupt wikiPageWikiLink Interrupt.
- Vertical_blank_interrupt wikiPageWikiLink Microprocessor.
- Vertical_blank_interrupt wikiPageWikiLink Multiple_buffering.
- Vertical_blank_interrupt wikiPageWikiLink NTSC.
- Vertical_blank_interrupt wikiPageWikiLink PAL.
- Vertical_blank_interrupt wikiPageWikiLink Page_flipping.
- Vertical_blank_interrupt wikiPageWikiLink Raster_scan.
- Vertical_blank_interrupt wikiPageWikiLink Vertical_blank.
- Vertical_blank_interrupt wikiPageWikiLink Vertical_blanking_interval.
- Vertical_blank_interrupt wikiPageWikiLink Video_game.
- Vertical_blank_interrupt wikiPageWikiLinkText "VBI".
- Vertical_blank_interrupt wikiPageWikiLinkText "Vertical blank interrupt".
- Vertical_blank_interrupt wikiPageWikiLinkText "vertical blank interrupt".
- Vertical_blank_interrupt wikiPageWikiLinkText "vertical".
- Vertical_blank_interrupt hasPhotoCollection Vertical_blank_interrupt.
- Vertical_blank_interrupt wikiPageUsesTemplate Template:Unreferenced.
- Vertical_blank_interrupt subject Category:Video_game_development.
- Vertical_blank_interrupt hypernym Feature.
- Vertical_blank_interrupt type Article.
- Vertical_blank_interrupt type Work.
- Vertical_blank_interrupt type Article.
- Vertical_blank_interrupt comment "A vertical blank interrupt (or VBI) is a hardware feature found in some computer systems that generate a video display. Typical video display circuits generate vertical blanking and vertical sync' pulses when the display picture has completed and the raster is being returned to the start of the display.".
- Vertical_blank_interrupt label "Vertical blank interrupt".
- Vertical_blank_interrupt sameAs m.012wc7.
- Vertical_blank_interrupt sameAs Q7922818.
- Vertical_blank_interrupt sameAs Q7922818.
- Vertical_blank_interrupt wasDerivedFrom Vertical_blank_interrupt?oldid=636655601.
- Vertical_blank_interrupt isPrimaryTopicOf Vertical_blank_interrupt.