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Chilly Willy

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Everything posted by Chilly Willy

  1. Thanks for the welcome! Glad to be here. :)

  2. Instead of dividing the jiffies by 50/60, perhaps it would be better to add your own VB handler and increment a seconds variable every 50/60 ints.
  3. Well one significant feature of the SIO2SD is the ability to swap images in and out of drives on the fly. Well, that is certainly a handy feature, and I do like the LCD display over the LEDs. The cost isn't a factor here, but I didn't want to pay extra if it was just a waste. It doesn't sound like a waste at all.
  4. I'm looking at getting an SD interface myself... is there a preference between SDrive and SIO2SD? I was thinking of getting the SIO2SD myself.
  5. Or even more expensive and get a Neo Myth MD 3-in-1. The nice thing about the MD Myth is that it includes the FM chip so that SMS games that use FM actually have the FM chip on the MD in SMS mode. So if the FM is important to you, that's one consideration. Note that the Nomad doesn't have the audio input lines on the cart port, so while the Nomad can use the MD Myth (you need to make a mod to connect the SMS mode line from the port to the ASIC for SMS games), you don't get FM sound despite having the FM chip. I need to look into a sound mod for the Nomad to add that. Maybe pay Tiido for that seeing how good his CCAM for the MD2 is.
  6. I've always considered good hardware to be a measure of the flexibility. Does the CPU HAVE to do everything? (yes = not very flexible) Can the video be changed at nearly any time? (yes = flexible) Does the sound require near constant management? (yes = not very flexible) Can you count on a wide variety of inputs? (yes = flexible) The Atari 8-bit computers were very flexible, which is why that was the 8-bit system I went with. When it came time to move to 16-bit, I went with the Amiga for the same reason - more flexible.
  7. Do they? I thought they started the screen offset enough (16 bytes) so that the framebuffer was unbroken by the 4K boundary. If this is your own program, be sure to keep that boundary issue in mind.
  8. It's been a LONG time since I did any Atari programming, but I'd probably use the XIO and hit the C: device directly. That sounds more like what you want. You can find the screen the way russg says, then open C: and use the XIO functions to transfer the data. Don't forget there's a location that controls the speed of the cassette (fast/slow)... I don't remember the address offhand, but the cassette defaults to slow in BASIC because they felt BASIC couldn't handle the data rate for fast mode. Depending on what you do, that may or may not be the case.
  9. I heard this too. I wonder if, those who don't care for it, were thinking it was going to be a Sonic game? I really like Chaotix and did not have an expectation of it being a Sonic game at all. It's similar but definitely not a Sonic game. The controls take a bit getting used to but once you give it enough time to get used to them your rolling through stages. I was one of those expecting a Sonic game, and as such felt let down. I dislike it less now, mainly because I quit thinking of it as a Sonic game, and put it on its own. Now my main complaint is the fact that you're supposed to "fly" through the levels, so they put little effort into making the levels interesting as they figure you'll never see most of them anyway. As to 32Xs not working, the most common problem by far is the ribbon connectors not making good contact. Much of the time, just pulling out and reseating the ribbons takes care of the problem. What some people do is separate the two halves, put a sheet of paper between them, then reseat the ribbon. The paper applies more outward pressure on the two halves of the ribbon, making better connection. That fixes nearly every 32X that doesn't work or is flaky.
  10. Given there's already a Pitfall 2 hack in the 5200 sub-forum, I figure this should be okay, but if not, feel free to edit this. This is a hack I made more than 15 years ago to Pitfall 2 for the Atari 8-bit home console. The biggest problem I had with the game was that even the slightest error sent you back to the last cross, which might mean having to go back through half a level to get back where you died... and might just die again! It was especially bad on the last level trying to get the darn rope. So I hacked Pitfall 2 to add a save/load game state feature. Press OPTION during the game to pull up the menu. You can format a disk, save to the disk, or load from the disk. Pitfall 2 was "fun" to hack since the protections on it were so hard to bypass. In the end, I wound up leaving the rom strictly alone; instead, I reassembled the game code to 10KB below the rom, stripping out the protection code and adding the save state hack. This hack is a DOS binary program and will play on any Atari with 48KB of RAM. You can run it in Atari800 using the -run option. Pitfall2.zip
  11. Yes, it properly fits on the Model 1. There's a plastic skirt that you attach for the Model 2, and leave off for the Model 1 or CDX; there was going to be a skirt for the CDX, but SEGA never got around to getting the 32X FCC approval for the CDX, so they never made the skirt either. It works fine with the CDX, but doesn't look as nice without the skirt. As to whether you should get one... it depends. There are not many games for the 32X, but a few are worth playing. It's about the only way (short of MAME) to play Star Wars Arcade. Virtua Racing Deluxe was a fine game; so if you don't have the Saturn or PS2 version, you might want the 32X version. Same for Virtua Fighter. Knuckles Chaotix is kind of hit-or-miss... about half the folks love it, and the other half don't. In any case, the 32X is usually pretty cheap to pick up on eBay, and most of the games are cheap as well, so even if there's just a couple games you like out of the library, it's probably worth getting. You can always try the games via emulation first and see if there's enough to interest you; if so, start watching eBay for a deal.
  12. Well, the FP was masterful, too, it just shouldn't have been used for all variables in BASIC. Back in the stone age of hacking, I cut the cart line on the cart port and added a toggle switch to my extra 400. The switch allowed me to toggle the cart line by hand, allowing me to boot the floppy, flip the switch to enable the cart, and use bsave to copy the cart to floppy. It was how I dumped Pitfall II since it used the diagnostic start vector to help prevent dumping the cart.
  13. Yes, the sound effects were far better on the Atari version than the C64 version. The first time I heard Necromancer on the C64, I was flabbergasted! At least they did a half-way decent job converting the music.
  14. Yes, a game save was sorely needed... so I made one! Have you seen a 24KB version of Pitfall II on the net? That's one I made many years ago; it was the first "true" hack, allowing you to get beyond the balloon stage without crashing or "odd" problems. I took the opportunity to also add a game save - just press OPTION during the game to get the menu. You can format a floppy (single-side/single density only), save a game to floppy, and load a game from floppy). It was the only way to get that damn golden rope... jump - die - reload, jump - die - reload, jump - die - reload, jump - MADE IT! - save, jump - die - reload, jump - die - reload, jump - die - reload... The game was heavily protected - the entire rom was checksummed, and the protection code used in places as data to keep you from just nop'ing them out. My solution was simple - leave the rom only; I just pulled out all the game code, rewrote it to skip any checks, changed where it ran, and added the save game features. So you had an untouched version of the rom at the normal place, then the actual running code under it. It worked like a charm, and runs on any Atari with 48KB of ram.
  15. Can you believe this was one of the first games I got for my Atari 400? I actually got this game on CASSETTE! It took quite a while to load, but it was worth it. I eventually transferred the game from cassette to floppy and added a startup to the front. It was just SLIGHTLY faster loading from floppy.
  16. Every single 6502 has Ion implantation. The process before that was ion diffusion - a gas of the dopant was allowed to cover the wafer under heat for a long period (usually hours) during which time it would gradually "soak" into the silicon. This resulted in heavier concentrations at the surface, with the concentration lessening as you got further into the silicon. This had certain negative affects on the quality of the IC. It was eventually replaced by ion implantation - the dopant was "shot" into the wafer using strong electric fields instead of just being allowed to gradually diffuse into the surface. This would usually give a more constant concentration of the dopant by depth compared to diffusion. It also kept the dopant almost exactly under the mask where diffusion resulted in "smearing" as the dopant spread out from where it entered through the mask. This allowed for smaller feature sizes as well. The switch-over from diffusion to implantation took a while, and was "big news" to people in the business, so it wasn't surprising that chip makers touted this for some time after switching. It's similar to how many TV shows touted "In color!" for a few seasons after the switch from black and white to color. Sure, EVERYONE was in color, but they still kept proclaiming it as if it were still new and unusual.
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