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Topic: GTIA

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	GTIA (Site not responding. Last check: 2007-11-02)
		Using the GTIA is as simple as using the CTIA.
		The GTIA is fully supported by the Operating System, and all the commands and utilities that run with the CTIA can be used with the GTIA, except you now have more colors available to you.
		GTIA programs can be used on CTIA equipped machines, but will suffer color simplification and some shifting (e.g.
	www.atarimagazines.com /v1n2/gtia.html (843 words)

	GTIA - Wikipedia
		Um diese Darstellung beeinflussen zu können, enthielt der GTIA eine Reihe programmierbarer Register, mit denen z.B. das "tatsächliche Aussehen" der Farben bestimmt werden konnte, die der ANTIC darstellen sollte.
		Der GTIA kümmerte sich um die Bewegung dieser Elemente, er bestimmte, ob ein Player/Missile vor oder hinter einem bestimmeten Teil des Grafikbildes erschien, und er war in der Lage, Kollisionen zwischen Player, Missiles und der restlichen Grafik festzustellen.
		Diese Technik entlastete den Prozessor erheblich bei der Darstellung bewegter Grafik.
	de.wikipedia.org /wiki/GTIA (268 words)

	De Re Atari - Appendix E (Site not responding. Last check: 2007-11-02)
		The GTIA expands this to use all nine color registers or 16 hues with one luminance or 16 luminances of one hue in a static display.
		GTIA is fully upward compatible with the CTIA and all software that runs on a CTIA system will run the same way on a system with GTIA.
		The GTIA graphics modes are fully supported by the OS and all graphics commands and utilities that run in the CTIA modes can be used in GTIA modes.
	www.atariarchives.org /dere/chaptE.php (1800 words)

	About Green Trails (Site not responding. Last check: 2007-11-02)
		GTIA maintains the common areas and mows the rights-of-way along arterial streets.
		GTIA is governed by fifteen directors, who serve without compensation.
		The GTIA annual meeting is held on the second Tuesday of November, with date and time publicized.
	www.greentrails.org /about.htm (571 words)

	Window on GTIA (Site not responding. Last check: 2007-11-02)
		The GTIA chip offers three modes which allow up to nine arbitrary colors, 16 shades of one hue, or 15 hues of one luminance plus fl.
		The real power of the GTIA, however, is that each and every point in the GTIA modes can be set to any of the available colors.
		Note that the display list is the same for all three GTIA modes and for Mode 8, except for the fact that the GTIA modes do not normally support the text window.
	www.atarimagazines.com /v2n1/windowongtia.html (1260 words)

	Atari 8-bit Forever by Bostjan Gorisek
		ANTIC directly controls most of GTIA's operations, but the 6502 can be programmed to intercede and control some or all of GTIA's functions.
		GTIA converts the digital commands from ANTIC (or the 6502) into the signal that goes to the television.
		GTIA also adds some factors of its own, such as color values, player-missile graphics, and collision detection.
	gury.atari8.info /card_graphics_modes.htm (218 words)

	GTIA (Site not responding. Last check: 2007-11-02)
		As the serial data of the different object pass through the GTIA, it is "impressed" with the color and luminance values in these registers.
		Priority is assigned to each object by the GTIA chip before the serial data from each object are combined with the other chip before the serial data from each object are combined with the other objects and sent out to the TV screen.
		There are two versions of the GTIA: The NTSC (United States TV standard) and PAL (one of the European TV standards).
	homepage.ntlworld.com /kryten_droid/Atari/800XL/atari_hw/gtia.htm (1905 words)

	CTIA/GTIA (Site not responding. Last check: 2007-11-02)
		CTIA artifacts in blue/green, GTIA in 400/800 artifacts in green/blue and GTIA in XL/XEs artifacts in red/blue.
		It's said that all PAL GTIAs are missing one red color, which is substituted by doubled brown color.
		Latest PAL GTIAs from China have annoying bug in 'GTIA modes', where some bits are displayed with high luminance.
	www.atarimax.com /jindroush.atari.org/achgtia.html (185 words)

	800&XL/XE graphic modes ANTIC&CTIA/GTIA - AtariAge Forums
		You only need a GTIA for all modes the only difference is that you can’t use the GTIA modes with the basic command GR.
		GTIA had 256 color pallete and the 16 color mode in 9,10,11 - CTIA didnt really have much for those modes IIRC.
		GTIA has no problem with 16 luminances and the control for 16 luminances is still there.
	www.atariage.com /forums/index.php?showtopic=71548&mode=linearplus (2465 words)

	CTIA / GTIA Registers
		GTIA modes are normally only used with ANTIC's luminance-only graphics mode (F).
		This means that in GTIA mode 2, a pixel value of 3 has the same priority as player 3, and a pixel value of C has the same priority as playfield 0 (color 1 in normal color modes).
		While it's clear that CTIA or GTIA is solely responsible for all video output to the television, it is unclear how this chip interacts with ANTIC.
	www.xmission.com /~trevin/atari/gtia_regs.html (1445 words)

	The Machine Room :: Atari :: 800 :: Technical (Site not responding. Last check: 2007-11-02)
		The GTIA is an extension of the older CTIA, and was mostly backwards compatible.
		The GTIA can deliver a maximum of 256 colours to the display: 16 different colour hues, each with 16 different levels of brightness.
		As for the 80x192x16 shade mode: ‘In GTIA mode nine, you have 16 different luminances of the same hue.’ [This is combined] with 16 hues for a total of 256 colours colours.
	www.machine-room.org /computers/46/technical.html (1711 words)

	Atari 8-bit family - Wikipedia, the free encyclopedia
		For example, the GTIA used a series of registers to select colors for the screen; these colors could be changed by inserting the correct values into its registers, which were mapped into "memory" that was visible to the 6502.
		The CTIA chip was replaced with the GTIA in later revisions of the 400 and 800 and all other members of the Atari 8-bit family.
		GTIA output them as separate digital luminance and chrominance signals, which were mixed to form an analogue composite video signal.
	en.wikipedia.org /wiki/Atari_8-bit_family (4900 words)

	GTIA (Site not responding. Last check: 2007-11-02)
		The GTIA is the chip between the ANTIC and your monitor/tv-set.
		The main task of the GTIA is to convert the data which the Antic produces into a complete picture for the monitor.
		But you can tell the GTIA to take the bits of this hires-mode to interprate the bits in another way.
	www.s-direktnet.de /homepages/k_nadj/gtia.html (1084 words)

	CTIA / GTIA Pinout
		In the GTIA modes, it takes two clock cycles to load all 4 bits of data for each pixel.
		GTIA will load the first two bits during one clock, and the next two bits at the second clock.
		The timing is as follows: during horizontal blank, ANTIC asserts HALT on the GTIA chip at clock T0.
	www.xmission.com /~trevin/atari/gtia_pinout.html (334 words)

	Atari GTIA - Wikipedia, la enciclopedia libre
		El GTIA generaba la señal de TV de los datos que le envíaba ANTIC.
		El GTIA disponía de sprites (en castellano: duendecillos), llamados jugadores (players) y proyectiles (missiles) que se usaban principalmente en los videojuegos.
		Además, debido a las diferencias en cómo el CTIA y el GTIA interactuaban con el televisor, los programas que dependían de los artificios de color {en inglés: color artifacts} se desplegaban de forma diferente.
	es.wikipedia.org /wiki/Atari_GTIA (357 words)

	Atari 8-Bit Computers: Frequently Asked Questions - allanswers.org
		Jindrich Kubec writes, "The problematic Chinese 800XEs with GTIA problems were manufactured in 1992." The 800XE was discontinued in 1992.
		These chips were designed by Atari engineers primarily to take much of the burden of housekeeping off of the 6502, thereby freeing the 6502 to concentrate on computations.
		The PAL GTIA is used in France and the Lum outputs are run into an onboard encoder to produce a "psudo" color depending on the Luminance output, composite only.
	www.allanswers.org /hardware/atari-8-bit/faq.htm (4210 words)

	Page 6 - Issue 2 - GTIA Modes
		When the basic Manuals were written the Atari computers were capable of only 9 graphics modes (Modes 0 to 8) available directly from Basic.
		With the introduction of the GTIA (George's Television Interface Adaptor) chip to replace the old CTIA chip, the computers now have the added facility of Graphics Modes 9, 10 and 11.
		This fact is reasonably well publicised but there's not a lot of literature around to tell you how to use these modes.
	www.page6.org /archive/issue_02/page_10.htm (995 words)

	TIP - Taquart Interlace Picture
		It's limited to 30 (shades from 0 to 14.5, every 0.5), but you can't freely use all the 30 shades, because average amount of information about single pixel is 3.5 bits (GTIA mode 9 is 4-bit, mode 10 is 3-bit).
		Conversion of shades to HIP can be problematic, but a simple and giving good results method is taking shade of every second pixel (starting from the first) for mode 9, and the other pixels' for mode 10.
		We code GTIA 9 shades on 4 bits and in mode 10 we ignore the lowest bit.
	www.s-direktnet.de /homepages/k_nadj/tip.html (753 words)

	Antic und GTIA (Atari 8 Bit)
		Antic und GTIA wurden fast unverändert mehr als zehn Jahre lang in jedem 8-Bitter von Atari eingebaut.
		Atari hat der GTIA gleich zwei Varianten spendiert: Die 8 Pixel breiten "Player" und die zwei Pixel breiten "Missiles", von denen es jeweils vier gibt.
		Zudem fügt GTIA die Daten der Player-Missile-Grafik ins Bild ein.
	www.homecomputermuseum.de /doku/video40_de.htm (515 words)

	[No title]
		Jindrich Kubec writes, "The problematic Chinese 800XEs with GTIA problems were manufactured in 1992." The 800XE was last manufactured in 1992.
		The GTIA was completed before the CTIA." In BASIC, type POKE 623,64 [RETURN] and if the screen flens, you have the GTIA chip.
		In some ways the specifications of the hardware in the 8-bit Atari computer are closely linked to the specifications of the television signal standard used in the market where the machine is designed to be used.
	www.cise.ufl.edu /mirrors/internet-FAQs/comp.sys.atari.8bit/Atari_8-Bit_Computers:_Frequently_Asked_Questions (14953 words)

	[No title] (Site not responding. Last check: 2007-11-02)
		Jerry Jessop, mailto:jjessop1@home.com adds: "The very first proto systems did have the GTIA, but it had some problems and was not released in the consumer version until 1981.
		The GTIA was completed before the CTIA." 1982 The introduction of the 1200XL in late 1982 marks the single largest advance in the 8-bit Atari system.
		Some words on GTIA bugs, from Andreas Magenheimer, mailto:magea000@mail.uni-mainz.de : All of these newer and buggy GTIA`s were built with the "eastern european" XE computers.
	www.steverd.com /faqs/Atari-8Bit.htm (14808 words)

	Appendix Four (Site not responding. Last check: 2007-11-02)
		All of you should now know what a GTIA chip is, so let's try and figure out a way to tell if your Atari has one.
		Well, GTIA gives us three extra graphics modes which we can use to get many more colors on the screen than usual.
		By the way, if you try to use a GTIA program on a CTIA machine, it will run fine as long as it doesn't use the GTIA modes (with the exception of the artifacting problem).
	www.atariarchives.org /mmm/appendix_four.php (1036 words)

	GTIA - Supporting Young People (Site not responding. Last check: 2007-11-02)
		Welcome to GTIA this site offers young people that may be wondering about there sexuality.
		GTIA's goal is to help young people with there sexuality.
		To fully understand why GTIA was started please have a look at the video below.
	www.gtia.org (73 words)

	atari.area forum / CONSOL = GTIA SOUND = 5th Sound channel? (Site not responding. Last check: 2007-11-02)
		@ atariage we re-find out that GTIA is generating the keyclick sound which will be mixed into the pokey sound output...
		uzyskanie sensownych brzmień i jakiejś nad nimi kontroli na gtia wymaga wystarczająco dużo wysiłku cpu, żeby przy zdolnościach ich koderów grą tą było kółko i krzyżyk na wyłączonym ekranie.
		Well - the conclusion is -> GTIA chip may acts just like speaker in ZX-Spectrum (ZX examples are here).
	atariarea.histeria.pl /forum/viewtopic.php?id=3911 (958 words)

	Committees
		The GTIA Parks Committee serves as a liaison between Lisle Park District and GTIA Board.
		If the situation warrants, the GTIA rep is available to transmit a Green Trails perspective on some issue under discussion, or bring an item back to GTIA for feedback.
		The GTIA rep reports on each Park Board meeting at the following GTIA meeting, either orally or in writing.
	www.greentrails.org /cmtes/parkdistrict.htm (204 words)

	atari.area forum / Poszukiwany opis działania wadliwego GTIA
		Miałem takie GTIA, które włączone na zimno działało bardzo źle, po chwili coraz lepiej a po zmianie zasilacza w kompie całkiem dobrze (to sprawa napięcia zasilania a nie mocy zasilacza).
		Electron napisał wyżej, że jeśli napięcie zasilania w takiej atarce ze zwalonym GTIA się zmieni (zwiększy?), to układ - a przynajmniej niektóre takie - zaczyna działać dobrze.
		Cóż naprawa jest banalna - trzeba wyjąć zwalone GTIA i wstawić dobre...
	atariarea.krap.pl /forum/viewtopic.php?id=4238 (1299 words)

	Planet Irata: Memopad
		In early 1982, Atari began using an upgraded version of the CTIA chip called GTIA.
		GTIA stands for Graphics Television Interface Adapter, and CTIA means Color Television Interface Adapter.
		To find out if your Atari 400 or 800 computer has the newer GTIA chip, run the following BASIC program (don't forget to plug your BASIC cartridge into the left slot)...
	www.geocities.com /~irata/memopad.html (518 words)

	Atari 5200 FAQ -- Hardware Overview (Site not responding. Last check: 2007-11-02)
		The GTIA's main responsibility is to generate the video signals to the TV and to handle sprites.
		The GTIA is where the actual colors are put into the video signal.
		The GTIA chip can detect collisions between players, missiles, and the playfield.
	www.atarihq.com /5200/5200faq/04_02.html (509 words)

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