+Larry Posted October 4, 2015 Share Posted October 4, 2015 @ Simius- How about a couple of "with and without" pics? Clever device and certainly reasonably priced, but will the typical user see any difference, or is improvement dependent on a programmer using special coding to show the benefits? -Larry 1 Quote Link to comment Share on other sites More sharing options...
venom4728a Posted October 9, 2015 Share Posted October 9, 2015 I would like to purchase 2 when available. Robert Quote Link to comment Share on other sites More sharing options...
Simius Posted October 9, 2015 Author Share Posted October 9, 2015 Larry, Special coding is necessary to exploit a new capabilities. I'll try to make a picture to show you an effect, but it need some time. 1 Quote Link to comment Share on other sites More sharing options...
Rybags Posted October 9, 2015 Share Posted October 9, 2015 Many of the 480i pics and the MemoPad demo allowed turning the interlace on/off and locking on one field or the other. Turn interlace off, you just have 2 images alternating and occupying the same space. Have interlace on with a single image, it just fills in the blank part between scanlines somewhat more on a CRT. Have interlace on with a suitable pair of images split as odd/even pairs and you get doubled vertical resolution. Note with interlace including broadcast pictures if you have single scanline horizontal lines you'll get flicker. Quote Link to comment Share on other sites More sharing options...
Simius Posted October 9, 2015 Author Share Posted October 9, 2015 Larry, these are two pictures, as you wanted - with and without interlace. 2 Quote Link to comment Share on other sites More sharing options...
AtariNerd Posted October 9, 2015 Share Posted October 9, 2015 /quizicle dreamer mode on/ Ooh, ooh! 1.) Is there enough time to alternate between two seperate palletes, say two gr. 15 screens , one with Luma and the other with Chroma information? 2.) Does PAL blending still work, at least perceptually between two 50/60 hz fields? You can guess where I'm going with this... If PAL blending doesn't work, might it work as part of a hardware solution, where interlace is created internally and the two fields are captured by an external device and stacked on top of each other, afterwards, merging the signals? /-awaiting information-smackdown truth and quashing of ridiculous dreams/ Two 4/5-shade/color gr.15 screens, even as a still-screen, would still look pretty impressive, as it would approximate the density of a Gr. 8 screen, with twice the shades/colors. Quote Link to comment Share on other sites More sharing options...
Simius Posted October 9, 2015 Author Share Posted October 9, 2015 (edited) There is a lot of time between two half-frames for all you need. PAL blending should work, but how it would look on the LCD TV, may depends on the image processing in the specific TV model. Edited October 9, 2015 by Simius 1 Quote Link to comment Share on other sites More sharing options...
Rybags Posted October 10, 2015 Share Posted October 10, 2015 PAL blending between 2 frames doesn't work, it's only good for adjacent scanlines on the one frame. Doing stuff like colour switches between frames in my experience didn't gain anything over what it looks like in non-interlaced mode. 1 Quote Link to comment Share on other sites More sharing options...
kenjennings Posted October 10, 2015 Share Posted October 10, 2015 I'll take three. Quote Link to comment Share on other sites More sharing options...
Rybags Posted October 10, 2015 Share Posted October 10, 2015 I'm thinking I should get one. I'll also try get some time free later and see if I can dig out some of my interlace stuff and modify to work with this device. Quote Link to comment Share on other sites More sharing options...
Simius Posted October 10, 2015 Author Share Posted October 10, 2015 PAL blending between 2 frames doesn't work, it's only good for adjacent scanlines on the one frame. You're right. PAL blending doesn't work. This is optical effect only. Quote Link to comment Share on other sites More sharing options...
Simius Posted October 10, 2015 Author Share Posted October 10, 2015 Damn! It appeared that LCD TVs (at least a few I have) has that feature embedded. This means two consecutive frames are treated as interlaced half-frames and displayed with an offset. It is therefore sufficient to make the computer switching images each frame, and the rest will be made by TV himself. There can be a little trouble with the even/odd identification, but it's a detail. Old analog CRTs can't do that and the device would be applicable, but late for many years. Quote Link to comment Share on other sites More sharing options...
Rybags Posted October 10, 2015 Share Posted October 10, 2015 I wouldn't worry about it too much. Many people specifically keep CRT TVs and monitors for the purpose of using with old computers. It wouldn't surprise me if you did a survey that over 2/3rds still use a CRT with their Atari. 1 Quote Link to comment Share on other sites More sharing options...
Pmetzen Posted October 10, 2015 Share Posted October 10, 2015 I'll take one Quote Link to comment Share on other sites More sharing options...
peteym5 Posted November 6, 2015 Share Posted November 6, 2015 I am interested in one, maybe two. I always wondered, can this effect player/missile graphics as well. Change the PMBASE register to get double resolution along with changing CHBASE. What will happen if we change all the player position and color registers during a field change, will we get 8 players? I am not sure what will happen if we tried some of those fancy software driven graphic modes with it also. Probably will create a whole new set of graphics modes. Final question, will there be a memory location a program can check to know if the this device is present? If there is, I may make some future games that support Interlace Mode. 1 Quote Link to comment Share on other sites More sharing options...
potatohead Posted November 6, 2015 Share Posted November 6, 2015 He did say the bit was read write now. Assuming it isn't in the original hardware, that's your quick check right there. Quote Link to comment Share on other sites More sharing options...
Synthpopalooza Posted November 6, 2015 Share Posted November 6, 2015 I think it would also be neat to add this device's capabilities to the next Altirra emulator release. It would also be interesting to see if any of the software modes (APAC, HIP, etc.) would improve with this device. I don't know that the ICE modes (ICE CIN, PCIN, Super IRG) would necessarily see improvement, as these rely on character mode, and without special tricks, the mode or register changes can only happen every character line (8-scan lines). Would be very keen to find out if this game remix I did could be improved though: http://atariage.com/forums/topic/211412-the-wall-v-20-tetris-using-ice-cin-mode/ Quote Link to comment Share on other sites More sharing options...
Defender II Posted November 9, 2015 Share Posted November 9, 2015 Two for me please. Quote Link to comment Share on other sites More sharing options...
Brentarian Posted May 17, 2016 Share Posted May 17, 2016 *bump* Just curious, is this project still alive? Quote Link to comment Share on other sites More sharing options...
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