Rybags Posted March 21, 2008 Share Posted March 21, 2008 Looks really good. Very nice how it plays the digitized sound effects without any motion stopping. Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted March 21, 2008 Share Posted March 21, 2008 (edited) Sheddy, the videos look amazing! I am interested in the digi-speech routines... would it be possible to let me know how you managed them to play back "ingame"? Edited March 21, 2008 by Heaven/TQA Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted March 21, 2008 Share Posted March 21, 2008 and Yes... similar experience while using RMT + FX in MetaLLamas... "Left my own sound effects engine in the game rather than RMT as I need a bit more control over the 1 channel that's left for the sound effects. I couldn't find a good way in RMT to resume a sound effect when interrupted by another. (That may just be me though.)" but could be us... Quote Link to comment Share on other sites More sharing options...
Rybags Posted March 21, 2008 Share Posted March 21, 2008 There's a number of ways you could get digi-FX like that. One possibility is to use POKEY timer IRQs - the voice is being used in forced volume anyway, so you can use it's timer without "losing" a voice. Quote Link to comment Share on other sites More sharing options...
deathtrappomegranate Posted March 21, 2008 Share Posted March 21, 2008 OK! I've posted an update on the site www.sheddyshack.co.uk and added some movies. Outstanding! Quote Link to comment Share on other sites More sharing options...
Shannon Posted March 21, 2008 Share Posted March 21, 2008 You Tube link Atari 8bit Turrican engine lol. Someone took the first comment a little too seriously.. boghead - Looks gr8 mcappp Actually is Gr.15 160x100 with 5 colors (black, white, green, Blue and purple) Uhh he was saying it "Looks great ". Quote Link to comment Share on other sites More sharing options...
Sheddy Posted March 21, 2008 Share Posted March 21, 2008 (edited) There's a number of ways you could get digi-FX like that. One possibility is to use POKEY timer IRQs - the voice is being used in forced volume anyway, so you can use it's timer without "losing" a voice. Yes, that's how it's being done now, so this is what you should experiment with, Heaven. Although I did find using 2 voices for a more accurate timer helped with unwanted sample noise - that way IRQ's can be timed to miss the critical VBI and DLIS exactly, which otherwise will screw with the timing. Oh, and another tip is not to use the OS IRQ vectors! They seem to add too much delay in determining the cause of the interrupt and again seem to add unwanted noise. Edited March 21, 2008 by Sheddy Quote Link to comment Share on other sites More sharing options...
emkay Posted March 21, 2008 Share Posted March 21, 2008 You Tube link Atari 8bit Turrican engine lol. Someone took the first comment a little too seriously.. boghead - Looks gr8 mcappp Actually is Gr.15 160x100 with 5 colors (black, white, green, Blue and purple) Uhh he was saying it "Looks great ". And gr. 15 is a 100 scanlines mode and has 5 colours Quote Link to comment Share on other sites More sharing options...
Rybags Posted March 21, 2008 Share Posted March 21, 2008 I guess you could just use the VBI for the digi-sound too. Possibly play one sample right at the start, then another further in. Agreed - the resolution of timers isn't that great - but in 16 HKz mode you get the benefit of 1 tick being exactly a scanline. Problem is, that would interfere with everything else. Agreed - the OS routine is way too slow. Timers are way down on the priority list. I guess the most efficient way would be to just disable every other IRQ, and use the immediate vector. Or, just swap out the OS use your own low-level handler. Quote Link to comment Share on other sites More sharing options...
+CharlieChaplin Posted March 21, 2008 Share Posted March 21, 2008 Wow !! Fantastic Great work Chris ! Can`t wait to play SH some day... Now, how are you gonna release SH when its finished - as a cart image (XEGS, Maxflash,...?) or an XE bootdisk image or what ?!? -Andreas Koch. Quote Link to comment Share on other sites More sharing options...
puppetmark Posted March 21, 2008 Share Posted March 21, 2008 WOW! That is impressive to say the least. Fantastic work! Quote Link to comment Share on other sites More sharing options...
Sheddy Posted March 21, 2008 Share Posted March 21, 2008 That is looking (and sounding) great! I wonder, could the engine be used for other similiar games (OutRun for instance?) It might work for some, but I think the engine would be too slow for OutRun if the road is done properly - I couldn't draw the proper Space Harrier grid on the floor quick enough on the Atari for my liking, and that is a lot simpler than OutRun's road. So I think the character based approach being taken with the current OutRun conversion is probably quite sensible. Quote Link to comment Share on other sites More sharing options...
Sheddy Posted March 21, 2008 Share Posted March 21, 2008 Wow !!Fantastic Great work Chris ! Can`t wait to play SH some day... Now, how are you gonna release SH when its finished - as a cart image (XEGS, Maxflash,...?) or an XE bootdisk image or what ?!? -Andreas Koch. It will be an 8Mbit MaxFlash image. Anything other than a cart would require a massive RAM expansion, so I'm not looking at doing any other formats. Quote Link to comment Share on other sites More sharing options...
Sheddy Posted March 21, 2008 Share Posted March 21, 2008 (edited) I forgot to say - thanks for the kind comments everyone! I will hang on to them, as sometimes I can only see the flaws and limitations in the game now, as I've been too close to it for so long. Edited March 21, 2008 by Sheddy Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted March 21, 2008 Share Posted March 21, 2008 Sheddy... can you post or send me the POKEY timer sources? as I never played around with pokey timers plus samples. and which is the sample rate? Quote Link to comment Share on other sites More sharing options...
+Stephen Posted March 21, 2008 Share Posted March 21, 2008 Amazing work! Such a shame we didn't get games like this when the Atari's were still on the shelves. Stephen Anderson Quote Link to comment Share on other sites More sharing options...
Sheddy Posted March 21, 2008 Share Posted March 21, 2008 Sheddy... can you post or send me the POKEY timer sources? as I never played around with pokey timers plus samples. and which is the sample rate? you're missing out on all the fun if you don't do it yourself you know OK, this is an example that sets up timer 4 without the OS to run at 4KHz and is a good starting point to show basic sample playback ; disable IRQ sei ; point the irq vector to your routine that plays back 1 sample lda #<irq_play_sample sta 65534 lda #>irq_play_sample sta 65535 ; we'll assume Pokey clock is set to normal 64KHz and set timer 4 to count to 16 (4KHz sample) lda #15 sta AUDF4 ; enable timer 4 lda #4 sta IRQEN ; enable IRQ cli ; start timers with a non-zero value sta STIMER NB apart from playing the next sample, your "irq_play_sample" routine should put 0 and then 4 into IRQEN to reset and re-enable IRQ 4 until all the samples are played. hope that helps Quote Link to comment Share on other sites More sharing options...
Tezz Posted March 21, 2008 Share Posted March 21, 2008 It's really awesome work Chris, it's one of the most impressive things I've ever seen on the platform. The latest work and the improvements are instantly noticable. The sample routine is very impressivley implemented. it's been discussed how it's possible to achieve it but I don't remember it ever being done before on the A8 or certainly to my mind not as well? The more I see of this project the more impressive you've managed to make it. It's a shining example of a project that has been painstakingly worked on with care to gain the most from the platform with outstanding results. Quote Link to comment Share on other sites More sharing options...
JIMPACK Posted March 21, 2008 Share Posted March 21, 2008 Hello! I remember read something on this forum about a Super Mario Bross for Atari 8 bits. That´s true? Quote Link to comment Share on other sites More sharing options...
NRV Posted March 21, 2008 Share Posted March 21, 2008 Great work! I really like the fourth level, with the ceiling effect included (software sprites FTW!). I should have more faith in 15 fps for 3d games from now on.. (do you have some levels running at 20 or more fps at some point?) Best "impossible" port for the (Atari) 8bits by far By the way, how many levels do you think you are going to do? all of them? About the irq's.. I suppose that you have timers in sync with the screen display (so they don't collide with any DLI or VBI in any frame)? so you need to start the irq's at a specific point the first time? Many years ago I used DLI's evenly distributed to play sampled music, but it was a little restrictive about the sampling rates that you can use for the sound NRV Quote Link to comment Share on other sites More sharing options...
emkay Posted March 21, 2008 Share Posted March 21, 2008 Btw: It would be nice to have the latest videos on YOUTUBE Quote Link to comment Share on other sites More sharing options...
Allas Posted March 21, 2008 Share Posted March 21, 2008 Btw: It would be nice to have the latest videos on YOUTUBE Quote Link to comment Share on other sites More sharing options...
Sheddy Posted March 22, 2008 Share Posted March 22, 2008 (edited) Great work! I really like the fourth level, with the ceiling effect included (software sprites FTW!). I should have more faith in 15 fps for 3d games from now on.. (do you have some levels running at 20 or more fps at some point?) Best "impossible" port for the (Atari) 8bits by far By the way, how many levels do you think you are going to do? all of them? About the irq's.. I suppose that you have timers in sync with the screen display (so they don't collide with any DLI or VBI in any frame)? so you need to start the irq's at a specific point the first time? Many years ago I used DLI's evenly distributed to play sampled music, but it was a little restrictive about the sampling rates that you can use for the sound NRV some of the later levels will be 20fps, but it struggles to do even a few sprites at 25fps. would like to do all the 18 levels of course! yes, the sync is important with the IRQ's, as is the sample rate. I always thought DLI's might be good for samples too, although I never tried it! Edited March 22, 2008 by Sheddy Quote Link to comment Share on other sites More sharing options...
+CharlieChaplin Posted March 22, 2008 Share Posted March 22, 2008 Hmm, does Atari 800 emulate the Max-flash cart scheme right now ?!? Or is the game working -as is- on the emulator ?!? I am asking, because a) I never used this emulator and b) I don`t think that thousands of Atarians will buy a Maxflash cart to play SH. And it would be very sad if all your impressive work could be enjoyed only by "a few" Maxflash cart owners... And err, does SH require the full 8Mbit (a full one megabyte) of the Maxflash cart ?!? If not, maybe Fandal could do a nice 320k file version, like he already did with many XEGS carts... Otherwise said: It`s great to see such a wonderful game for the A8 - but it would be very sad if only very few Atarians could really play it in the end... -Andreas Koch. Quote Link to comment Share on other sites More sharing options...
Shawn Jefferson Posted March 22, 2008 Share Posted March 22, 2008 Andreas, what's the difference if the game is sold on a regular cart or a flashcart? You could think about it this way... would you buy the game on cartridge? If yes, then just buy a flashcart and put the game on it. Atarimax sells the 8Mb flashcart for $39.99 USD + shipping. That's fair for a game of this caliber, IMO. Maybe Chris will add some packaging and sell them for $50 or something like that... still in the price range for a good homebrew game. I think I paid around $50 for Alpine Games for the Lynx. Quote Link to comment Share on other sites More sharing options...
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