pixelpedant Posted February 20, 2022 Share Posted February 20, 2022 There was a brief discussion in the Zoom user group meeting yesterday about the "Bad Apple" demo which has had variations implement on a whole slew of different legacy systems. For example, ZX Spectrum: And Intellivision: Seems like ripe material for anyone who feels like exploring some given category of full screen motion demo on the TI-99. Maybe a multicolor mode demo? Or a PETSCIIish use of Mode 1. Naturally, the tools exist (thanks to Tursi) for generation of bitmap FMV demos, so that's possible. But it would seem to me a fast full screen mono demo (or some implementations use grey, but that would complicate things substantially) is a quite different category. Regardless, likewise thanks to Tursi, the digital audio tools exist. So that's covered. 4 Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted February 20, 2022 Share Posted February 20, 2022 10 minutes ago, pixelpedant said: Seems like ripe material for anyone who feels like exploring some given category of full screen motion demo on the TI-99. You mean as one of our in-house wizards has done? 9 1 Quote Link to comment Share on other sites More sharing options...
pixelpedant Posted February 20, 2022 Author Share Posted February 20, 2022 Ah, figures Tursi would have applied himself to this problem, given the applicability of his tools to just such a problem. Still, plenty of room for other approaches, I figure. Which is not to say "better" approaches. Just different ones. 1 Quote Link to comment Share on other sites More sharing options...
+hloberg Posted February 20, 2022 Share Posted February 20, 2022 one improvement would be to use the music only version like the Atari 8-bit. the voice sounds distorted on the TI99. 3 Quote Link to comment Share on other sites More sharing options...
pixelpedant Posted February 20, 2022 Author Share Posted February 20, 2022 There's (fairly recently) an MSX1 version as well, incidentally: https://homebrew.file-hunter.com/index.php?id=badapple (online emulator - plays in web browser) 2 Quote Link to comment Share on other sites More sharing options...
TheMole Posted February 21, 2022 Share Posted February 21, 2022 I personally think the ti99 version is by far one of the best on that generation of platforms. The fact that it has the real digital audio really sets it apart. I guess a version with PSG audio would probably sound a lot like the master system version: Regarding the video itself, I really prefer the high res look of Tursi's version over the more blocky variants on other systems. 1 Quote Link to comment Share on other sites More sharing options...
tmop69 Posted February 21, 2022 Share Posted February 21, 2022 is the .bin available for TI99 version? I would like to try it on MiSTer TI99 core. Quote Link to comment Share on other sites More sharing options...
Tursi Posted February 22, 2022 Share Posted February 22, 2022 (edited) On 2/20/2022 at 12:03 PM, hloberg said: one improvement would be to use the music only version like the Atari 8-bit. the voice sounds distorted on the TI99 As the video says in the description, the source video I was working from had badly over-amplified audio, causing a lot of clipping. I need a clean audio source to do it right. The only place it sounds right is around the orchestra bit, when the audio is low enough not to clip. But anyone else is welcome to Since mine is just a hack of the video tools to run in monochrome (so that I could double the framerate), it takes too much memory to be useful for a cartridge. 13 hours ago, tmop69 said: is the .bin available for TI99 version? I would like to try it on MiSTer TI99 core. I never built it into a bin - when I did it even the gigacart didn't exist yet, so it ran through Classic99 with a pseudo cartridge. Hell, if you look at the source code, Classic99 couldn't even play the sampled audio when I did this. We could redo it, I suppose, but again, I need a cleaner source. (Although I see it's less than 16MB, so it would fit on a standard bank switched cart - though still bigger than any we've made). Of that, audio is 3MB. Also, since it was that far back, there's a good chance that the playback speed is a little slow, since it wasn't till Dragon's Lair that I got the hardware speed right. To run this, you have to run a hack from the command line. It assumes a hardware cartridge with auto-incrementing memory, which was one of my original plans. It wasn't necessary in the end, but that's what this code uses. From the command line: classic99.exe finalPACK.bin Then go into Editor/Assembler, #3, load videomono.obj. #4 run program name : MAIN Audio is quite soft, and yeah, it sounds slow on current Classic99, and very clipped. But I did this a long time ago! Not going to work on MISTER though. badappleti_wip.zip Edited February 22, 2022 by Tursi 6 1 Quote Link to comment Share on other sites More sharing options...
Tursi Posted February 22, 2022 Share Posted February 22, 2022 18 hours ago, TheMole said: I personally think the ti99 version is by far one of the best on that generation of platforms. The fact that it has the real digital audio really sets it apart. I guess a version with PSG audio would probably sound a lot like the master system version Nice! The TI should be able to meet that Master System version bit for bit, depending on how they update the screen. It looks bloody nice! Sounds less cool, but, essentially the same sound chip as the TI. 1 Quote Link to comment Share on other sites More sharing options...
Tursi Posted February 22, 2022 Share Posted February 22, 2022 On 2/20/2022 at 12:03 PM, hloberg said: one improvement would be to use the music only version like the Atari 8-bit. the voice sounds distorted on the TI99 I quite like the sound of that one, but, the Pokey always has a unique sound. The karaoke mode is nice too. The every-other-scanline thing is something I wish we could do on the TI to stretch low res screens... but I've not been able to think of a way that's significantly faster than just writing actual data. We could double up scanlines, but we don't get to save any time for the stretch (defeating most of the purpose) and it looks blockier than every other line. Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted February 22, 2022 Share Posted February 22, 2022 2 hours ago, Tursi said: I quite like the sound of that one, but, the Pokey always has a unique sound. The demo being done with a stereo POKEY installation helps. Along with its unique sound, POKEY is quite good in the right hands. 1 Quote Link to comment Share on other sites More sharing options...
JB Posted February 22, 2022 Share Posted February 22, 2022 (edited) I reckon if the 4a version used PSG audio like everyone else, we'd have to do our own special thing and be the first second demo with synthesized speech lyrics. First is the NEC PC-6601, apparently. Edited February 22, 2022 by JB 2 Quote Link to comment Share on other sites More sharing options...
pixelpedant Posted February 22, 2022 Author Share Posted February 22, 2022 I'm curious what synthesizer the PC-6601 used. Can't find anything, on initial googling. Just lots of general mention of it. But probably a General Instrument part, I guess. 1 Quote Link to comment Share on other sites More sharing options...
+FarmerPotato Posted February 22, 2022 Share Posted February 22, 2022 3 hours ago, pixelpedant said: I'm curious what synthesizer the PC-6601 used. Can't find anything, on initial googling. Just lots of general mention of it. But probably a General Instrument part, I guess. Good guess! PSG AY-3-8910. Here: https://www.old-computers.com/museum/computer.asp?c=177 Quote Link to comment Share on other sites More sharing options...
pixelpedant Posted February 22, 2022 Author Share Posted February 22, 2022 29 minutes ago, FarmerPotato said: Good guess! PSG AY-3-8910. Here: https://www.old-computers.com/museum/computer.asp?c=177 Well, that's the PSG. So it's pretty likely the speech synthesizer was likewise a GI chip. But that would have been in addition to the PSG. It's listed here as optional on the Mk2: https://www.old-computers.com/museum/computer.asp?c=394 Quote Link to comment Share on other sites More sharing options...
JB Posted February 22, 2022 Share Posted February 22, 2022 6 hours ago, pixelpedant said: I'm curious what synthesizer the PC-6601 used. Can't find anything, on initial googling. Just lots of general mention of it. But probably a General Instrument part, I guess. "upd7752 voice speech device" according to MAME source. Which makes a degree of sense, as it was an NEC-manufactured part. Datasheet seems to be available online. https://www.alldatasheet.com/datasheet-pdf/pdf/7087/NEC/UPD7759.html 2 Quote Link to comment Share on other sites More sharing options...
+hloberg Posted March 6, 2022 Share Posted March 6, 2022 ok, this is got to be one of the most out there bad apple; lasers & tesla coils. 7 Quote Link to comment Share on other sites More sharing options...
Tursi Posted March 7, 2022 Share Posted March 7, 2022 On 3/5/2022 at 5:36 PM, hloberg said: ok, this is got to be one of the most out there bad apple; lasers & tesla coils. Damn, that looks and sounds great 1 Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.