Get the best deals on Atari 130XE Vintage Computers & Mainframes and find everything you'll need to improve your home office setup at eBay.com. Fast & Free shipping on many items Atari 130XE i originalkartong med SD-kortläsare En riktigt ovanlig, modifierad Atari 130XE, av företaget Textett. Denna har sannolikt använts för rullande texter i skyltfönster, mm. Det medföljer en cartridge, där man kan mata in texter i olika färger, som scrollas. Är dock osäker på cart:ens funktion nu, hände inget vid test The Atari 130XE Personal Computer Field Service Manual is a reference guide for the service technician. Since the XE series has more models, so on the basis of the 130XE model will also be discussed different versions 65XE computers, as well as console XE-SYSTEM Until now Atari's reputation for very highly-priced products and extremely over-priced software has put software houses off since there was no mass market to but their wares. However, things are about to change. Atari has launched the 130XE personal computer with 128K RAM for a staggering £169.99 Atari 130XE Manuals Manuals and User Guides for Atari 130XE. We have 4 Atari 130XE manuals available for free PDF download: Users Handbooks, Owner's Manual, Service Manua
Atari 130 na Allegro.pl - Zróżnicowany zbiór ofert, najlepsze ceny i promocje. Wejdź i znajdź to, czego szukasz The Atari 130-XE was first shown at the Winter Las Vegas Consumer Electronic Show in 1985 (with the Atari 130 ST), it has the same characteristics as the Atari 800 XL except its added memory (128 KB instead of 64 KB for the 800 XL). The extended memory can be used as a RAM disk, or can be accessed by bank switching routines Wiz-Atari is a Atari 800, 800XL, 130XE and 5200 emulator ported to the Gamepark Wiz from the Atari800 sources. WiiXL WiiXL is a port of the Atari800 emulator 2.0.3 to the Wii developed by raz0red. The Atari800 emulator is a free and portable Atari 800/XL/XE/5200 emulator,. ATARI 130XE - BOX ONLY + Inlay box and nylon - rare only one on ebay. 473,73 z. Search results for 'ATARI 130XE - Memory problems' (newsgroups and mailing lists) 11 replies [Contiki-developers] Atari Contiki Port & Ethernet Cart. started 2003-10-22 12:18:44 UTC. contiki-developers@lists.sourceforge.net. 10 replies looking for XL/XE ROM files and memory test question. started.
Jack Tramiel's Atari Corporation produced the final machines in the 8-bit series, which were the 65XE and 130XE (XE stood for XL-Expanded). They were announced in 1985, at the same time as the initial models in the Atari ST series, and resembled the Atari ST Hello to all. I have started to work in a remake of Atari 130XE pcb board, more specific with the 4 rams. The main reason who I started is because I never seen someone else before to do this for the XE range. Many things run in my head about the final design of this pcb board. Must be a 1/1 remak.. Atari 130XE Der 130XE unterscheidet sich vom 65XE lediglich durch den hier 128 kB großen Arbeitsspeicher. Von diesem Modell existieren drei leicht unterschiedliche Versionen: Das NTSC-Modell, das PAL-Modell ohne TV-Umschalter und das in Frankreich angebotene SECAM-Modell mit Monochrom- und Farbumschalter, jedoch ohne TV-Anschluss und -Umschalter
ATARI 800, 800XL,1200XL, 65XE & 130XE TV Audio/Vid . Four classic 8 bit disk games for the xl/xe: elektra glide, alley cat, colossus chess 3 and blue max. atari disk drive - trak at-1 extremely sought-after drive Atari 130XE, Atari 800XL, Atari 65XE Operating System Atari Additional Information. ASIN B005LH3VJO Best Sellers Rank #474,814 in Computers & Accessories (See Top 100 in Computers & Accessories) #22,646 in Tower Computers: Date First Available October 9, 2012 Warranty & Suppor Atari 130XE lockade mer än C64. Från början hade jag tänkt mig en C64 eftersom nästan alla mina bekanta hade sådana men när jag lusläste annonserna i Svenska Hemdator Hacking drogs uppmärksamheten till en annan dator, nämligen Atari 130XE Pimp My Eight, Episode 7:Total refurbishment of an Atari 130XE, the best 8-bit computer ever made by Atari, and one of the finest examples of 8-bit computer.
About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators. The old Atari 800 had this feature, but it was eliminated on later models. Dual-Personality DOS Before examining the 130XE's new features in greater detail, let's cover the new functions of DOS 2.5, since they affect all users of 8-bit Atari computers as well as 130XE owners. First of all, if you don't have a copy of DOS 2.5, get one soon
The 130XE is compatible with the Atari XL/XE line of computers, but adds an additional 64K of RAM, and a new Freddy custom chip to manage the banked memory. It also includes a special expansion port that was only used on the 130XE -- the Enhanced Cartridge Interface port It runs Atari 400, 800, 600 XL, 800 XL, 130XE and 5200 games, supports 130XE compatible memory expansions, has cycle-exact 6502 emulation, NMI interrupts, scanline-based POKEY interrupts, and ANTIC and GITA emulation, has exact POKEY registers, is able to load Atari executable and BASIC programs directly, has support for the cassette recorder, printer, raw and CAS images, stereo emulation. The Atari 800XE Codename: N/A Release Date: 1988 (Europe Only) The Atari 800XE. A deviation from the numbering system used within Atari from 1985-forward when the company was purchased by Tramiel Technologies Limited from Warner Communications in July of 1984. The system is packaged in the same case design of the 1985 Atari 130XE The ATARI 130XE is the perfect computer for business, educational, and entertainment purposes. And the new 130XE comes with built-in ATARI BASIC programming language, so you can immediately begin to write your own programs. This manual is arranged for easy access to the information you need, whether you are a beginning or an advanced computer user
ataribooks-atari-130xe-machine-language-for-the-absolute-beginner Identifier-ark ark:/13960/t8v99g39r Isbn 86161200 Ocr ABBYY FineReader 8.0 Ppi 300 Year 1985 . plus-circle Add Review. comment. Reviews There are no reviews yet. Be the first one to write a review.. Atari 130XE Machine Language for the Absolute Beginner offers complete instruction in 6502 machine language. Each chapter includes specific examples of machine language applications which can be demonstrated and used on your own Atari 130XE
The Atari 65XE, Atari 130XE and the Atari XEGS replaced the original Atari XL series computer Systems. Atari XE Series Computer Systems Atari ASG Chips planned for use in 800XLF/900XLF systems. MUFFY (Atari 65101) Combined FREDDIE & MMU. MUFFY Design Equates. MUFFY Vendor. Atari 130XE (reconditioned, unboxed) On Sale from $149.99 Regular price $179.99 Sale — Sold Out. Atari 2600 Composite Video Modification. From $19.99 SIO Cable for Atari disk drives and peripherals. Regular price $15.00 — Sold Out. Atari 7800. On Sale from $59.99. We Want your Atari 800XL 130XE 600XL 65XE We buy anything Atari please contact us anytime . Message us on WhatsApp AtariGiant. We have alot more items in stock so please message us if theres anything you are looking for we promise to get back to each and everyone of you. Hours
The Atari 65XE to 320K / 130XE Ram upgrade, 256K 600XL, Atari 1200XL Operating System back to the more popular 400 / 800 OS standard and Indus 8 bit GT Disk Drive Upgrade ROM. Bests New Enhanced Composite Video cable for the Atari 65XE / 800 / 800XL / 130XE / 1200XL Computers. Are you an Atari. Atari 400/800/XL/XE News and Information. The Atari 130XE Handbook offers its readers the opportunity of harnessing the power of one of the newest and most exciting microcomputers with its advanced sound and graphics facilities The Atari 130xe was one of the last 8 bit computers built by Atari. This one is from a lot of rare (old) computers I bought in a flea market. Unfortunately, this computer was non-fonctional when I got it. This page describes the steps I took to repair this computer. Hopefully, the information here will be useful to someone someday.. Atari US / NTSC 130XE Populated Motherboard. CB101089 $139.95 Quote; Share this post. Link to post Share on other sites. Join the conversation. You can post now and register later. If you have an account, sign in now to post with your account
Atari games database (2600, 5200, vcs, 400, 800, 800XL, 130XE, 600XL, 520ST, 1040ST, Falcon) : dumps, roms, scans, manual, instruction, commercials, ads, tips, videos. Atari created this chip to replace several other chips to cut costs and to enhance CPU and ANTIC memory access. FREDDIE, combined with a C061618 MMU (XL/XE) and C025953 EMMU (130XE) allows the CPU and ANTIC to access memory independently of each other
Atari 130XE. In 1985 new owner Jack Tramiel was ramping up Atari to go head to head with his old company Commodore. He was banking on the new 16-bit ST machines to deal the knockout blow but must have felt there was still sales to be wrung out of the old 8-bit machines ATARI 1200XL Computer to reload a program, you must wait 3 to 5 seconds before turning it back on. ATARI If the word ATARI doesn't appear when you turn your computer on, check over all the pre- vious steps. Make sure that all cords and cables are plugged securely and that power is coming into the system. (The red Power ON/OFF ligh the-atari-130xe-handbook Identifier-ark ark:/13960/t69382x45 Isbn 0712697055 Ocr ABBYY FineReader 11.0 (Extended OCR) Openlibrary OL15158381M Openlibrary_edition OL15158381M Openlibrary_work OL11425783W Ppi 600 Scanner Internet Archive Python library 0.7. Atari 130XE Automated RAM Disk Stehphen J. Rockower Offering high speed and instantaneous access to programs and files, the Atari 130XE's RAM disk is one of its most attractive features. Now it's even more effective with this utility that moves selected programs and files into the RAM disk automatically whenever you boot the system
Atari 65XE - Lights up when power applied. Case is badly yellowed on top. - 65XE box (poor condition). Given size and weight, this is pick-up only from Harrogate and, as I need it to go, I won't split Atari 800XL 600XL 130XE 65XE ST. Photo Gallery. Contact Us. Drop us a line! Name. Email* Send. Better yet, see us in person! We love our customers, so feel free to visit during normal business hours. AtariGiant. 2 Walford Road, Walford, Ross-On-Wye, HR9 5RX, United Kingdom. 07469006787 01989 564812
Atari states that any software developed for the 130XE which does not use the extra RAM will be 100% compatible with their new 64K 8-bit 65XE computer. And of course the 65XE is being billed as 100% compatible with the 800XL model it replaces. The announced differences between the l30XE and the 65XE are: 1. RAM capacity and organization. 2 Atari Inc. was no more, as Atari Corporation was born in 1984. Under Tramiel, Atari slowly phased out its 8-bit family computer in favor of 16 or 32-bit processors, called Atari ST. S for 'sixteen' and T for 'thirty-two'. XE was the last line of 8-bit computers by the company, with 65XE and 130XE discontinued in 1991 and 800 XE in 1992
These emulators emulate the Atari 8 bit family: 400, 800, 1200XL, 600XL, 800XL, 130XE, XEGS and the Atari 5200. This can be one of the more tricky emulators to get set up as they require a multiplicity of BIOS files and configurations depending on what systems you want to utilise but it seems to run Atari 5200 games pretty well Atari 130XE Personal Computer. No power supply. Untested. Sold as is. Keys seem to work well, came a collector. Back to home page Return to top. More to explore : Atari 130XE Vintage Computers & Mainframes, Atari 130XE Vintage Home Computers, Atari Home Computers Atari 130XE with Box Computer: Condition 1 Box: Condition 2 (two small label tears on front, general wear) Includes original power supply (tested)Includes new A/V cable Fully functional, burned in, with 90-day warranty.NOTE: If you would like a new 5V power supply instead of the original Atari ingot power supply, se
Atari 130XE: 32 seconds 66 Mhz 486: 8 seconds (4 times faster) Pentium/90: 4 seconds (8 times faster) Now you can understand why for games we needed to supply a normal speed option! Installing XFORMER. Before anything else, make sure that you have a computer capable of running Xformer 2000 Turn your Atari into an exciting arcade of electronic fun and thrills with the easy-to-enter ready-made programs in this book. Containing 30 different games designed to demonstrate the complete capabilities of the Atari 130XE — arcade games, strategy games and adventures are all here for you to enjoy — without the need for any complex programming skills The old 130XE video blitz demo? Definitely interested in one of these. I was considering doing an internal 320K upgrade on my 130XE but the cheap PCB intimidates me. The fact I can stack an IDEplus on it is pretty awesome too! I still have my RAM 320XL but am not using it as much lately due to lack of PBI passthrough for my IDE controller Atari 800XE . Identical to the 130XE, the 800XE is a cheaper version sold only in a PAL version, mainly to Eastern Europe. Unlike the 130XE, the 800XE had only 64K of RAM, although the 130XE circuit board inside the machine could be easily upgraded (as long as the technician took pains not to pull up the poor-quality traces from the board)
Atari 800/800XL/65XE/130XE and Atari 5200 for MiSTer Board This is the port of Atari 800XL core by Mark Watson Installation. Copy the *.rbf file to the root of the system SD card. Copy the files to Atari800/Atari5200 folde Atari 130XE with Box (S/N 1109619) Regular price $189.99 — Sold Out. Atari 400. From $79.99 « Previous 1 2 3 Next » Interesting Stuff. View and Download Atari 130XE users handbooks online. XE Series. 130XE desktop pdf manual download. Also for: 65xe, 800xl, 1200xl, 800, 400, 600xl My first Atari was a 130XE. I now have 800XL's and a couple more XE's, but my favorite case design is still the XE. It just always seemed like a futuristic case to me, while the XL beige case kinda felt more like the previous era. Of course, beauty is in the eye of the beholder Atari MMU is a custom memory management unit chip for the Atari 8-bit computers. It enables access to the hardware registers on ANTIC, GTIA, POKEY and 6520 PIA. The later XL/XE MMU (C061618) also selects OS ROM, Atari BASIC ROM, self-test ROM and LEDs in the 1200XL. On the 128K 130XE the EMMU chip handles similar functionality.. The user cannot directly manipulate the Atari MMU, but selects.
Hello! Today, we're selling a vintage console Atari 130xe, with a cassette reader and two joysticks. Comes with the cassette reader you see in the pictures, does NOT come with the telly. Auction includes all the cables necessary, as you can see. You just plug that thing into your TV and you're ready to hit the nostalgia train Atari (/ ə ˈ t ɑːr i /) is a brand name owned by several entities since its inception in 1972, currently by Atari Interactive, a subsidiary of the French publisher Atari SA. The original Atari, Inc., founded in Sunnyvale, California, in 1972 by Nolan Bushnell and Ted Dabney, was a pioneer in arcade games, home video game consoles, and home computers.The company's products, such as Pong and. I was thinking to start a new design PCB for Atari 130XE/65XE/800XE with cherry mx switches and (so called) Cherry or OEM keycaps profiles and custom some special keys by (wasdkeyboard) ABS Plastic: Clear < Insert > Break Atari Inverse Arrow keys Photograph of an Atari 130XE home computer. Date: 7 and 12 October 2006: Source: Own work. This is the first publication of this image. Author: Multicherry: Permission (Reusing this file) Released under Creative Commons Attribution ShareAlike License 2.5 The Atari 130XE, an 8-bit home computer released by Atari Corporation in the mid-'80s. Date: 29 February 2012: Source: Own work: Author: Evan-Amos: Permission (Reusing this file) This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. You are free
Total refurbishment of an Atari 130XE, the best 8-bit computer ever made by Atari, and one of the finest examples of 8-bit computer engineering ever. The motherboard is recapped, tuned up, cleaned and upgraded with The Byte Attic's special Sally CPU replacement board. All key chips get heatsinks Posts about Atari 130XE written by Pete Davison. One of my favourite things about early computer games is the sheer creativity a lot of developers showed within the technological limitations of the time
Atari 130XE (1985) To bring the rest of the Atari computer family in line with the new ST series, the newly Tramiel-controlled Atari redesigned its still-popular 8-bit home computers This will also make it possible for me to create other, new Atari related sites in the future — such as for hardware/upgrades, productivity, games, etc. Donations of any size are appreciated (a few dollars is enough to buy some nice cold beverages to enjoy while working) I managed to go for it and get a fully upgraded Atari 130XE system. The guy I had do the work did a topnotch job on it, and I've been running it with the GBS-8220, but I know eventually VGA monitors will disappear on us, so I wanted an OSSC, plus from everything I'd heard a lot of the Atari/Amiga systems just shine when you use proper RGB (like SCART) Atari 800xl 600xl 130xe 65xe XEGS USB Power on/off switch cable (NEW) $25.97 + shipping. Seller 100% positive. Speed Hawk Atari 65XE, 130 XE, 800 XL, XE - Rare Game! $10.69. $15.27 previous price $15.27 + shipping. Seller 99.7% positive. Atari Nadia's World Nintendo DS 2DS & 3DS Girls Game Complete New Sealed RARE
Köp online atari 130xe (447838176) • Atari Hårdvara, Retrodatorer • Avslutad 16 feb 21:09. Skick: Begagnad • Tradera.co View and Download Atari 130XE owner's manual online. 130XE desktop pdf manual download Köp online 2st Atari 130XE (445916117) • Atari Hårdvara, Retrodatorer • Avslutad 7 feb 19:35. Skick: Begagnad Utropspris 1 kr Auktion • Tradera.co
Atari 8 Bit - Garage made sio2sd for SV2k14 from pit on Vimeo.. Funny thing is that on a party, Atari 130XE was given to our fellow group member XTD/Lamers who won Music Compo and unfortunately SIO2SD went to someone else - originally it was supposed to be one prize with Atari Sveriges största cirkulära marknad • Köp & sälj begagnat & second hand - enkelt & hållbart. Mode, Inredning, Elektronik, Motor, Samlarobjekt & mer • Trader Atari was founded by Nolan Bushnell and Ted Dabney in 1972 and was most well known for its home video game consoles and computers, as well as being a formidable force in the arcade games inductry. Along with pong, arguably their most important product was the Atari 2600 which shaped a generation.
Save atari 130xe to get e-mail alerts and updates on your eBay Feed. + Update your shipping location 7 S 0 P O N S O A R P A 7 E E D-1-1 U J-1 0 F J-1-1. 130XE. The US versions did NOT have an external expansion bus (the Atari XL computers had a PBI connector (Parallel Bus Interface) while the European Atari 65XE's (also called Atari 800XE's) and Atari 130XE's (both US and European) all had an ECI (Enhanced Cartridge Interface) which was functionally equivalent to the previous Atari XL PBI and allowed devices such as SCSI hard drive controllers. Köp online Atari 130XE komplett m.. (445364217) • Atari Hårdvara, Retrodatorer • Avslutad 7 feb 18:50. Skick: Begagnad Utropspris 1 kr Auktion • Tradera.co Fnorder, Atari TT030 PeP, FireBee Bjonte, C128 NollKollTroll, ZX81 InSTream, Falcon060 Henc0x, Falcon060 Redreamer, C64 TBC, ABC-80 Kilroy-71, Atari STE GreatGuy, Atari Digix, C64/128 kefka, Amiga 600/Atari ST/SNES Boo, GC, Megadrive, SNES, N64 Zapac, Atari 130XE+TBD Evl, Atari GhstWlf, TBA Sharakmir, C64 + Atari 2600 Yoshi, various Nintendo. Atari 130XE Schematics by Jerzy Sobola. Publication date 2003-09-23 Topics Atari, schematics, circuit, diagram, 130XE, retrocomputer Collection manuals; additional_collections Language English. Atari 130XE schematics drawn by Jerzy Sobola. Landscape version. Addeddate 2016-08-14 10:04:54 Identifie
This is basically Bomb Jack in Atari Basic. It is a bit slow, but still playable and works on 48k machines. Sub Attack: Quite good for a type-in BASIC game. Plays like a simplified version of SeaFox. Nice character graphics. Gateway to Apshai: Or better yet for 2 or 3 button support Atari 400 800 XL XE Books: , 101 Atari Computer Programming Tips & Tricks, 101 Programming Surprises & Tricks for Your Atari Computer, 101 Programming Tips & Tricks For Atari Home Computers, 31 New Atari Computer Programs, 32 BASIC Programs ATARI Computer, 41½ Fun Projects for the Atari, 6502 Anwendungen, 6502 Applications, 6502 Applications Book, 6502 Assembly Language Programming, 6502. Tag Archives: Atari 130XE Antic (February 1985) Posted by megalextoria on June 2, 2020. Source: Antic (February 1985) Leave a comment Posted in Vintage Computing Tagged atari, Atari 130XE, Atari 600XL, Atari 65XE, Atari 8-bit, Atari 800XL, retrocomputing Antic (February 1987 Atari 800XL, 60XL, 65XE, 130XE, XEGS USB Power Cable. A brand-new USB cable for powering the Atari 800XL, 60XL, 65XE, 130XE, XEGS. This cable is perfect for replacing damaged, broken or lost supplies
atari 130xe WHATEVER ELSE you might say about the new Atari 130XE, it's great value. You get a 6502-based micro with 128K of Ram, 11 graphics modes, five text modes, four sound channels, a very good full-stroke keyboard and a penny change from £170 Atari 130XE OS w/ Reverse Basic Atari 800 Compatible OS Hold SELECT at Power ON for On-Screen OS Selection Menu! SuperVideo 2.1 Upgrade(very sharp chroma/luma or composite video) Keyboard All Keys 100% Tested and Working(Keyboard hand refurbished to original responsiveness if required) APE/ProSystem. ATARI 130XE Handbuch. An icon used to represent a menu that can be toggled by interacting with this icon Atari 65XEP. Atari 800XE. Atari 130XE . The Atari XE Series computers were introduced at the 1985 Winter CES in Las Vegas. They would replace the Atari XL series computers. Content to be added, updated 3/20/2019. There are 187 known programs for the Atari 800, divided as follows:. Games (187) Click on the title for more information about that thing. Alternatively, list the games for a different machine. If you are looking for books, expansions or just a more visual representation of this data, you can generate a wall to your exact requirements.. You can also view our list of the worst games for the.
Vintage Atari Filter by Filter by 1010 1050 130XE 2600 400 600XL 65XE 7800 8-bit 800 800XL 810 Atari Cable Cartridge Computer Console Disk Drive Flashback Misc. New Part Parts Printer Retron SIO Tape Drive Video Game XEG Atari 800, 800XL, 130XE and 5200 emulator for PlayStation Portable - 8bitpsp/atari80
The Atari 130XE monitor jack has compostite video, composite chroma, and composite luminesence as outputs. I am guesing that the composite video is the Hsync and Vsync together, composite chroma is the red,blue, and green together, and luminesence is the equivalent of the intensity Emulator: Atari800 This emulator emulates the Atari 8 bit family: 400, 800, 1200XL, 600XL, 800XL, 130XE, XEGS and the Atari 5200. This one of the more tricky emulators to get set up as it requires a multiplicity of BIOS files and configurations depending on what systems you want to utilise but it seems to run Atari 5200 games pretty well Atari (/ ə ˈ t ɑːr i /) is a brand name owned by several entities since its inception in 1972, currently by Atari Interactive, a subsidiary of the French publisher Atari SA. The original Atari, Inc., founded in Sunnyvale, California, in 1972 by Nolan Bushnell and Ted Dabney, was a pioneer in arcade games, home video game consoles, and home computers Power Without The Price was the tag line that accompanied this full-fledge 8-bit computer that included 128KB of RAM, of which 64KB was available through b.. Atari 130xe field service manualOwner manual. Instruction. User manual. User guide. Mitsubishi lancer glxi 1994 service manual download.Manual infiniti fx35 2010.30919800676 - Atari 130xe field service manual.Epson aculaser manual.I'm the Slime by Frank Zappa is a poem that which forevermore atari 130xe field service manual be is meant to make the reader make mmanual and conclusions about.
The Atari 800XL, together with the 600XL, were successors of the Atari 400/800 series and the unsuccessful Atari 1200 XL in a more compact case. They could use almost the same software, just so long as the program was written correctly, because of some slight differences between OS versions :Description: Operating System Manual (400/800 TRN Supplement):PDF Pages: 44 Behold, the AtariLab starter set, running on an Atari 130XE & an Atari XEGS. Each one is running a set of temperature probes and the appropriate software, demonstrating early scientific measurement kits Atari has not announced yet whether this new 810 ROM will be made available. For more information, see the OS User's Manual. Locations 780 to 793 ($30C to $319) are for miscellaneous use. Locations 794 to 831 ($31A to $33F) are handler address tables. To use these. Tag Archives: Atari 130XE ANALOG Computing, September 1989. Posted by megalextoria on February 14, 2014. ANALOG Computing, September 1989. Leave a comment Posted in Retro Games, Vintage Computing Tagged 8-bit, atari, Atari 130XE, Atari 400, Atari 600XL, Atari 65XE, Atari 800, Atari 800XL, Atari XEG