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alex_79

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Everything posted by alex_79

  1. they are correct. The fact is that the PAL roms I listed in my previous thread run slower in Stella when in SECAM mode, while the speed should be the same (50 Hz, 312 scanlines). Those games were programmed by Atari to show proper colors on both PAL and SECAM consoles (there aren't SECAM-only roms). Yes, and it's correct in autodetect mode. What I mean is that the speed shouldn't change even when you force a different TV format, to properly emulate what happens when you mix different carts and consoles. On real hardware, a NTSC cart will run at 60Hz no matter what the format of the console is. Only the colors will be wrong on PAL and SECAM machines. Since PAL TV usually can do 60Hz without problems, some homebrews' authors converted their NTSC games for use with PAL consoles only by changing the palette, obtaining PAL60 games. So Stella should allow to cycle only through: NTSC, PAL60 and SECAM60, for games with ~262 scanlines NTSC50, PAL and SECAM, for games with ~312 scanlines There's no way to autodetect the difference between NTSC and PAL60 (and there aren't SECAM-only games, but only a few PAL games programmed to show decent colors on SECAM), so assuming NTSC for 60Hz and PAL for 50Hz is the best way IMO.
  2. Hi! I've installed Stella 2.4.1 and I have problems with Secam emulation. All the PAL roms I've tried run slower in Secam mode (either by changing the game properties or using CTRL+F), while the speed should be the same for PAL and SECAM. I tried some of the PAL games adjusted for SECAM, like Mario Bros, Asteroids, Battlezone, Pole Position and Obelix. Moreover I suggest to change the way Stella handle the TV format: currently it affects both speed/framerate (50 or 60Hz) and palette (PAL, NTSC and SECAM), while on real hardware the framerate results from the rom and not from the format of the console on which the game is running. So I think the speed should be determined only by the scanline count, no matter what palette is selected (Z26 works this way). This would avoid the need for a "PAL 60" mode too.
  3. I've posted some pics of my modded 7800 cart port in this thread.
  4. In fact you can safely use differnt values for both voltage and current. Check this post from A.J. Franzman about this subject.
  5. Since 60Hz refresh is supported by european TVs, the only difference in playing NTSC games on PAL consoles are the wrong colors. Some games looks good even with the different palette (Space games, for example), while others are really bad (red sky and sea, blue trees, etc.). When you play a rom, the emulators autodetect the format, so they always have right colors, but you can "force" the format of the emulated console to see if a rom is PAL or NTSC. In STELLA, use CTRL+F to change the format. In Z26 use the key next to "0" on you keyboard (According to the manual it should be "-", but this refers to US keyboard layout and may be different in your country. I use " ' " on my italian keyboard). If you set the emulator to PAL and the colors are wrong, then the rom is NTSC. A better method for identifying the format is by checking the scanline count. (refer to the manual to see how to do this on your emulator) Here there's a complete list of PAL games for the supercharger.
  6. There's a mac version of makewav on the mactari website
  7. You can use makewav to create .wav audio file from a rom. Then convert it to mp3 (search the web for "mp3 encoder" if you don't have a proper software already). You can only load the arcadia/starpath games and a few homebrews ("Oystron", for example) into an original supercharger. You can modify it to be able to load all 2kb and 4kb games.
  8. Once a game is loaded, the format of the supercharger (PAL or NTSC) doesn't matter anymore. I use my NTSC supercharger with PAL consoles to load PAL games and it works perfectly. The only difference with a PAL supercharger is that the load screen (the starfield with "REWIND TAPE","PRESS PLAY" and "STOP TAPE" flashing text) is displayed at 60 Hz (and maybe with different sequence of colors in the flashing text). Most European TV handle 60Hz without problem. Just use PAL roms/tapes with your supercharger.
  9. It was designed during the Warners period; the first prototype is from 1982. Check this page from the Atari Museum website: Atari 2200(2600jr Original Prototype) Altough it was released in North America only in 1986, the junior was available in Europe since 1984 and the early units were produced in Ireland (in the "short rainbow" and "all black" variations). They were packet in large silver boxes with two proline joysticks and a "centipede" cartridge, but there was also a version with only one joystick and without the game. Later they were repackaged in a smaller box. These consoles have an "Atari, Inc" copyright and the Warner Logo on the manual. There was also a version with PAL composite video output instead of rf. This was oly sold in France and I think is quite rare.
  10. The plastic cart guide is assembled with the connector by screws. Unfortunately, to access them (so that you can disassemble the cart guide and remove the dust protector) you have to desolder the connector from the main board. I suggest you to modify the 7800 cart slot instead. The problem with the 7800 is that the corners of the plastic cart guide are bevelled. Carts with squared corners (those by Activision and Imagic, for example), are difficult to insert or they don't fit at all. To modify it, disassemble the console and remove the shielding from the board. The screws which connect the plastic guide are accessible from the bottom of the board. Once removed, simply cut out the corners of the guide and reinstall it. Since the cart guide is quite recessed in the 7800 case, the mod is hardly visible once you have reassembled the console. Another solution is to buy a atari 2600 "junior". This model does't have the dust protector and accepts all type of cart without the 7800 issues.
  11. I bought an heavy sixer from UK and I think it's an original PAL unit. Unfortunately there's not the serial sticker under the case to confirm this. The unit was untested and without power supply and came with 2 sets of paddles and 1 driving controller (this one is the Atari logo version). It was sold simply as "woodgrain console". inside: main board (CO12283 rev 1 © 1978): switch board (CO12173 rev 1 © 1977): It's a PAL-I unit (for UK market), it doesn't have the channel select switch (AFAIK all UK units only use channel 36 and are not adjustable) and has an rca connector for the switchbox instead of the antenna connector later used by atari for the european market. I disassembled the unit and cleaned all the parts. The fake woodgrain was really worn out, so I swapped the upper part of the case with a non working light sixer. I kept the original switch bezel, though, because is a little different from my light sixer: the holes for the switches are a bit smaller and the borders around them are rounded and not flat. Finally I installed the cable from the broken light sixer, which has the correct plug for my tv and I tuned the inductor for the audio circuit (this is necessary to use this console with a PAL-B/G Tv set, which is the standard here in Italy). It works perfectly.
  12. thank you guys!! Yes, indeed. I thought it was an hack because the maze was different from what I get in emulators. I didn't know that it can be changed by using the difficulty switches :dunce:
  13. I have one of those atari clone with 128 built-in games and I can't identify 4 titles: Game #2 (Venture Hack) Game #66 (Frostbite Hack) Game #70 Game #73 Does anyone know what these games are?
  14. It happens if you enter the forum by clicking a link with the "&mode=threaded" tag. Some Google results have that. Also users' posts can contain those links: Click Here to see this thread in "Outline" mode You can return to standard mode by using the "options" menu or by deleting cookies in your browser or by clicking a link which contain the "&mode=standard" tag. If a link doesn't have the "&mode= " tag, the last display mode (stored in a cookie in your hard disk) is mantained. Click Here to see this thread in "Standard" mode
  15. Asteroids is built-in in the PAL 7800 console. In this page there are dumps of bios roms for use with mess emulator. PAL Asteroids code should be included in the 7800 PAL bios.
  16. I have this misprinted version too. Here's a scan of mine.
  17. I believe this was Curt's reply to a question about the presence of an external connector with the cart lines, not about the possibility to add a cart slot (like in the FB2). In fact he later said: Check the thread "Question - FB2 Portable" from post 377 to 400
  18. Those adapters works in north America where F connector is used for rf, but other countries use different plugs. The coax plug in the picture posted by zonaps2 seems to me the IEC connector which is the standard here in Europe for Pal TV. This was already used in the 70s and in fact almost all Atari consoles sold here (except the very first UK units which came with rca plug and switchbox) already had the right connector at one end and they could be connected without switchbox (which in fact wasn't included). If that cable works with the playstation antenna adaptor, then it's should work and the problem is elsewhere.
  19. It's easy to tell if a 6-switch is an heavy sixer or not because the bottom half of the case is quite different. You can find comparison pictures here.
  20. The console in your pics is NTSC, while the TV system used in Uruguay is PAL (according to this page). If your TV is not NTSC-compatibile you'll only see a black and white piture even if you manage to tune the right channel. Apart from that, I suggest you to clean all the connectors (cart slot on the console, connector on the carts and all plugs and sockets) with a spray contact cleaner. This simple operation fixed some of the used consoles I purchased. Alessandro
  21. It's a variable inductor, not a pot. Check this topic.
  22. I think that the cable is the same used by Atari ST computers. check these topics in the ST/TT section for more info: http://www.atariage.com/forums/index.php?showtopic=109093 http://www.atariage.com/forums/index.php?showtopic=9139 http://www.atariage.com/forums/index.php?showtopic=103170 Here there's the pinout for the scart 7800: http://musepat.club.fr/atari78.htm
  23. I think is an emulation issue, cause it bounces in Z26 (I use ver. 2.13), while it works fine on Stella (ver 2.3.5). The copyrighted rom shows the same behaviour. The picture is stable on real hardware (I have the copyrighted version).
  24. The driving controller is a 2-bit grey code rotary encoder. you can find some more info in this post. They are available (see this one for example), but probably they don't fit in an original case without modification. Here there are instructions and schematics for building an optical driving controller.
  25. 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:
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