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alex_79

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Everything posted by alex_79

  1. Does this mean that all units have a NTSC chip inside and use NTSC roms, right? The AV-OUT would be useful for two-players games or when using paddles. I hope that the connector could be easily installed on the european units (the lines should be there, I think) so it can be connected by using a NTSC to PAL adapter or a multistandard TV. I like the case design. I can't wait to buy one! :thumbsup:
  2. Here's my first Hack. At first it was only a graphic hack of Asteroids (I used an hex editor to change the graphics), but I then found the disassembly by Thomas Jentzsch which contains also the code for "Asteroids DC+" and "Sadistroids" and I redid it including some features from those great hacks. It's inspired by the sequence of the Millenium Falcon's escape through the asteroid field in the movie "The Empire Strikes Back". Features: - Driving controller support and remaining ship displayed instead of numbers. (from Asteroids DC+ and Sadistroids) - The asteroids are more realistic with "textures" and their colors are changed into shades of brown and dark-green. - The ship graphics is changed to resemble a tiny Millenium Falcon. - The Ufo and Satellite are changed into tie fighters and they are always active regardless the difficulty switches. - The copyright text is changed into a little title screen. I made a normal version with the speed of the original "Asteroids" and a "plus" version with faster asteroids and double Thrust (from "Sadistroids"). Graphically they only differs in the color of the title screen. I also made PAL60 and SECAM60 conversions :D (the asteroids are not so realistic with secam palette limited to 8 colors...). I didnt changed the framerate to keep the same speed, while the original PAL/SECAM release from Atari was slower than NTSC. Asteroid_Chase.ZIP P.S. I just found that the same idea was already used (see "Escape from Hoth"). I hope no one mind if I posted a similar game.
  3. The units are different too. The console determines the color encoding (PAL, NTSC or SECAM) and the color tables are different. The games affect the resolution and framerate. If you play a NTSC game in a PAL unit you get a PAL signal with the NTSC framerate (60 Hz) and wrong colors. There's an interesting page about NTSC, PAL and SECAM ATARI 2600 on Spiceware's website. You need a TV set which can receive a PAL60 signal through RF: usually multistandard TVs accept only composite/s-video signals; if this is the case you have to av-mod the pal unit. If it accepts RF you need to change/modify the TV cable or use an adaptor, since the antenna plug is different between PAL and NTSC. The power supply inputs are different because of the voltage and frequency used in different coutries. If the output match the console requirements, then is OK.
  4. alex_79

    Indy 500

    The driving controller generates a 2-bit grey code (4 unique binary values) and the sequence is repeated 4 times in a complete rotation. There are 4 position of the knob which correspond to a single binary value, so it's not an absolute encoder. It uses pins 1 and 2 of the controller port, which correspond to "up" and "down" joystick directions. as you can see in this picture there are only 3 wires connected to the encoder: black is ground, white and blue are joystick directions "up" and "down" respectively.
  5. my first post in HSC 137400 This was one of the two carts packed with my Atari when I received it, on Christmas 1985.
  6. This is the translation (sorry my english is bad): The seller's terms of sale say (in italian) that all email communications are automatically handled without an operator, so I wouldn't worry about that. Just leave the feedback after you receive the item.
  7. I posted some pics of the paddle disassembled in this topic.
  8. You could add that the "TV TYPE" switch on SECAM vcs actually affects the video signal (enabling or disabling colors), while its behaviour in NTSC and PAL consoles is determined by software; games that require that switch (Secret Quest for example) aren't playable correctly on SECAM consoles.
  9. If your unit is a clone and not an original Atari, then probably it doesn't have paddle support. I have one of those clone with 128 built-in games and it doesn't have paddle lines nor +5V line connected to the joystick ports. It can use joystick and driving controller, but not paddle, keyboard, booster grip, joystick with autofire, etc.. One of the games included is an hacked "Circus Atari" which use joysticks. Moreover it lacks the COLOR/BW selector (there's a switch for selecting the game instead).
  10. I read that the gemini come with a Y-adapter to use the paddles. It's required to use 2 player paddle games, because allows to plug 2 controller into 1 port and it redirects the fire buttons to the correct pins (which correspond to right and left joystick direction for paddle 1 and 2 respectively, according to the controller schematics here on AA). The Sears Video Arcade II/Atari 2800 controllers were wired the same way (but the adapter was "built in" the console, which in fact had 4 ports and a paddle/joystick switch). If you can't find one of those adapter you can easily build one yourself (or ask someone to build it for you). Something like this will do the job: And here a schematic of the controller: P.S. I found the info to draw these schematics searching the forum, but I don't have the controllers nor I built the adapter. Any comment, suggestion, correction is welcome
  11. AFAIK the "all-black" junior was PAL only. It's less common than the other versions but not rare in Europe. The production started in Ireland, together with the "short rainbow" in 1984. I think the unit in the auction it's PAL or maybe a "frankenstein" unit with a NTSC board mounted inside an case of a PAL unit. I posted some more info and some pitures about that in this thread. There are some minor differencies between these early "Atari inc" jr. and the later "Atari corp" produced in Asia. The most noticeable is that the black and short rainbow made in Ireland have "COLOUR/BW" written in white or black respectively under the TV TYPE switch. The short and long rainbow produced in asia have a blue lettering and say "COLOR/BW".
  12. You can tell if it's a secam console by looking at the colors displayed on TV. In fact, probably due to the limited market, Atari didn't develope a SECAM TIA (TIA is the graphic chip of the 2600), but created the secam version by adding an extra circuit to a NTSC TIA chip, allowing only 8 different colors associated with the luma values (the NTSC version has 16 hues, each with 8 luma values which give 128 different colors, while PAL has 13 hues X 8 lums = 104 colors). Here you can see the 3 TIA color palette. Moreover the color/B&W switch is wired in a different way. In NTSC and PAL 2600 it's a software switch, whose behaviour is determined by the game; in the SECAM console it affect the video signal and the "software" switch is hardwired to B&W. Some, but not all, PAL games released by Atari from 1980/81 (when SECAM 2600 was launched) until the game crash of 1984 were programmed to give decent colors on a SECAM console, while Activision released some specific PAL/SECAM games (with palette reduced to 8 colors) in addition to PAL-only versions (with full-color palette). See this topic for more info about Activision Secam games. Here you can see how some PAL games appear on a PAL or a SECAM console respectively. Combat: Air Sea Battle: Mario Bros: Defender: Realsports Soccer: Solaris: Another method is to open the case and looking at the board: A SECAM board it's pictured in this topic . For PAL, look at this.
  13. I tried to spray the cleaner inside the pot without disassembly it, but the result didn't satisfy me. The jittery was reduced but not completely gone and after a few days a new cleaning was needed. I then tried the disassembly method and that solved the problem definitely. After about six months the paddles are still smooth and completely jitter-free. I think "Circus Atari" is a good choice to test them: you can move the player with 1-pixel precision and you can notice also the slightest jittery. I also have "Breakout" but It seems to be less sensitive (probably the paddle input is checked less frequently in the code) and therefore I think is not suited for that purpose. I read somewhere that also "Video Olimpics" is a good test for paddles, but I don't have that game.
  14. Hi! I have a Q*bert cart (PAL) like that one. It's not clear from the picture, but there's "made in France" printed on the back of the case.
  15. Some pics which may help you: 1- hex nut under the knob which keep the pot in position 2- metal tabs which you have to bend to open the pot 3- the pot disassembled, before and after cleaning
  16. Thanks for the info! I wonder what "GP" stands for. Is it PAL or SECAM? I suppose the "CX-2600 AS" console is SECAM, but the PERITEL JR. posted by oldric in this topic is definitely PAL and has the same model number...
  17. PAL 2600 and 7800 already came with the IEC plug installed. If the pong console has a detachable cable, with a rca socket on the rear of the console or inside the case, you can swap it with the Atari one.
  18. The easiest way is to cut the rca plug from the cable and replace it with the right antenna connector. I've never seen an adapter from rca to IEC 169-2 connector (the antenna plug used in Europe an Australia), but you can build one yourself if you don't want to modify the console. Just buy a female rca and a male antenna connector (you'll find these in any elecric store) and connect them with a short piece of coax cable.
  19. AFAIK the video arcade II is a standard 2600, so it has support only for two joysticks. The 2 extra port are for 4 player paddle games.(the standard Atari paddle were paired with one connector, while the special combination joystick/paddle used by the svaII only had one paddle for connector).
  20. A bit further down it says - 'some support for the AtariVox speech chip too' Oops.. You're right, I missed that line! I added a note to my previous post. Thanks!
  21. According to AA store Strat-O-Gems Deluxe and Fall Down have speech synthesis. I checked Paul Slocum's website and seems that the loopcart uses the Atarivox to store/load sequences, but not for generating sound or speech. There's an unfinished alpha version you can download on the site. It's 4k and you can load it into the supercharger. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ EDIT: That's incorrect. As Richard H. pointed out below, it's clearly specified "some support for the AtariVox speech chip too" on the page, but I missed that line the first time I checked it. I don't know if the support is already in the alpha version, though. --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Here you'll find the software and info to transform the bin image into the audio file needed by the supercharger.
  22. These screenshots are taken with Z26.
  23. It seems that there are two version of the game. Here there are 2 NTSC roms I found on my HD: one with wraparound, the other without it. The 3 PAL roms and the actual PAL cart I own doesn't have that feature. rs_s.zip
  24. The Atarivox is a device which provides a speech / sound synthesizer and memory to save data such as high scores and game settings. It's a peripheral that can be used by games for the 2600/7800, but only if they are specifically programmed for it. I think that there are 4 homebrews that use it at the moment (Fall Down,Go Fish!,Strat-O-Gems Deluxe,AStar), and only two use the speech sythetizer (the other use only the memory to save high score and settings). Other games/programs are in development (Man Goes Down, Loopcart). The supercharger was a device which plugged in the vcs cart port and allowed games to be loaded from tapes. With specific software you can create audio files from rom images and load them connecting the supercharger to the sound board of a PC, but you cannot load games bigger than 4kbytes and not all the 4k games are compatible too. (I think that the games which use the speech synthetizer of the Atarivox are bigger than 4k, so you can't use a supercharger to try them.) Use the search function, you'll find tons of info about them on AA.
  25. I think that the date on the board refers to the production or assembly of the board itself, while the one on the case refers to the final assembly of the console. (I have a junior with the date stamped inside which precedes the one on the serial number by about a month). The copyright should be "1981"; the "8" probably is misprinted, or partly detached from the board so that it looks a "9". My "vader" made in Ireland has the same board, but doesn't have a date printed on it.
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