Heaven/TQA Posted November 12, 2016 Share Posted November 12, 2016 we just released Jitter demo our contribution at SillyVenture demo party: it runs on Lynx 2. snap01.bmp snap02.bmp snap03.bmp snap04.bmp snap05.bmp snap06.bmp dsr_jitter_demo_sillyventure_2k16.zip 10 Quote Link to comment Share on other sites More sharing options...
+Stephen Posted November 13, 2016 Share Posted November 13, 2016 Excellent - I will try this on my Lynx2 with McWill VGA screen in a moment. 1 Quote Link to comment Share on other sites More sharing options...
atarian63 Posted November 13, 2016 Share Posted November 13, 2016 Excellent - I will try this on my Lynx2 with McWill VGA screen in a moment. should look great on mcWill, Love mine! 1 Quote Link to comment Share on other sites More sharing options...
sirlynxalot Posted November 13, 2016 Share Posted November 13, 2016 Looks great. I love the polygon donut thing 1 Quote Link to comment Share on other sites More sharing options...
TrekMD Posted November 13, 2016 Share Posted November 13, 2016 Very nice! Quote Link to comment Share on other sites More sharing options...
bdoi Posted November 13, 2016 Share Posted November 13, 2016 Congratulations ! Really impressive ! Quote Link to comment Share on other sites More sharing options...
+karri Posted November 13, 2016 Share Posted November 13, 2016 Wow. Nice. Quote Link to comment Share on other sites More sharing options...
Stun Runner 87 Posted November 13, 2016 Share Posted November 13, 2016 we just released Jitter demo our contribution at SillyVenture demo party: https://youtu.be/YEi3bv2duXw it runs on Lynx 2. How can I get this on cart? Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted November 13, 2016 Author Share Posted November 13, 2016 (edited) With a flash cart? Edited November 13, 2016 by Heaven/TQA 1 Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted November 13, 2016 Author Share Posted November 13, 2016 Some technical informations: It loads parts from cart Sprite blitter is used for the polygons Most of time rendered into sprite SCB and then put on screen with Suzy Samples are 8bit signed. 6000 KHz. 3D Engine (matrix multiplications etc) are using maths copro. Engine can handle 256 faces and 256 vertices per object. Concave objects, sorting faces done by CPU. Main issue developing for lynx is that the emulators are nowhere accurate to real HW esp when using the custom chips. But even the 65c02 emulation in Handy seeks "off" as playback of sample is not done by timer IRQs but with CPU loops and real HW is off to emulator leading to pitched samples. Maths calculations are faster in handy than real hw and I suspect rendering with Suzy, too. Overall took and drove me nuts in the end. Ok, I am using STeem, WinUAE, Altirra and Vice... so would assume better emulators for Lynx then... 3 Quote Link to comment Share on other sites More sharing options...
marss Posted November 13, 2016 Share Posted November 13, 2016 really nice Quote Link to comment Share on other sites More sharing options...
sage Posted November 13, 2016 Share Posted November 13, 2016 You made it. Quote Link to comment Share on other sites More sharing options...
sage Posted November 13, 2016 Share Posted November 13, 2016 crashes after cube zoomer on my flash card. :-( this coincides with some "funny" rom access reported by the emulator (debug version). Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted November 13, 2016 Author Share Posted November 13, 2016 Strange because it runs on my flash cart and handybug? Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted November 13, 2016 Author Share Posted November 13, 2016 Maybe corrupt upload to flash cart? Had that right before deadline... Quote Link to comment Share on other sites More sharing options...
sage Posted November 13, 2016 Share Posted November 13, 2016 I did a verify, the flash was O.k., I tried another flash card, here it worked (at least one time). What flash card did you sue for testing? Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted November 13, 2016 Author Share Posted November 13, 2016 The one which is sold here in Stuttgart....not knew the exact version Quote Link to comment Share on other sites More sharing options...
+karri Posted November 13, 2016 Share Posted November 13, 2016 (edited) I burned the demo on a cart and did a byte-by-byte check that every byte is correct. The demo runs until the 4 boxes have rotated for a while. Then the demo freezes and the music turns to an engine sound - brrrrr. But only on Lynx 2. I tried with two units. On Lynx I the error comes just when the apes are appearing. The screen goes black. But the music continues. At the credits part the screen comes on again and the demo plays nicely to the end. I also tried this on two Lynx I's with identical outcome. This Lynx I error is something I have seen before while testing Championship Rally. The reason was that Lynx I is very picky about when you can change the palette. On Mednafen (Ubuntu 64bit 16.04) the demo runs fine. Edited November 13, 2016 by karri Quote Link to comment Share on other sites More sharing options...
sage Posted November 13, 2016 Share Posted November 13, 2016 Maybe I should make a tour to Stuttgart then Well I have two differnt of these ... but one is a prototype. Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted November 13, 2016 Author Share Posted November 13, 2016 Uj... interesting as I have run it on lynx 2... So I did checks with original hardware... Picky when palette changes? Interesting, too. Is mednafen more accurate than handy? Anyway I will share sources so we might find the issue of incompatibility? Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted November 13, 2016 Author Share Posted November 13, 2016 My fade routines are done in vbl. Quote Link to comment Share on other sites More sharing options...
gilsaluki Posted November 13, 2016 Share Posted November 13, 2016 Talented. Consider this guy/gal for the next administration.... Quote Link to comment Share on other sites More sharing options...
+karri Posted November 14, 2016 Share Posted November 14, 2016 I don't remember exactly what solved the issue in Championship Rally. But when we changed the order of accessing the registers in Suzy the problem went away. It would be interesting to see if Lynx I could display the cubes correctly by removing the fade before the apes. On the real Lynx I cannot see any problems with colours. But I have one McWill screen and on that one the top part of the cubes start having small colour errors at the top of the screen like the palette changes would be late. Perhaps 1/3 top area of the screen. The effect grows bigger until the demo crashes. Quote Link to comment Share on other sites More sharing options...
Heaven/TQA Posted November 14, 2016 Author Share Posted November 14, 2016 Interesting... I will post later thAt effect as stand alone .o Quote Link to comment Share on other sites More sharing options...
sage Posted November 14, 2016 Share Posted November 14, 2016 (edited) I see the palette problem (i would rather guess, doublebuffer not switched on VBL?) in the cube part ony my unmodded lynx 2. But didnt want to get picky on it. but now that you mention it... And the credits part went with completley black screen. mednafen and handy use the same codebase, but there are slight differences. esp in the IRQ part (sound). But its not so clear what is the correct behaviour. Proboem with the sound is, that changes here break compatibility for other games. we now the something is fishy but have to idea how to fix it. Edited November 14, 2016 by sage Quote Link to comment Share on other sites More sharing options...
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