Forums
-
Atari Systems
-
- 20.3k
- posts
-
- 707.6k
- posts
-
- 91.5k
- posts
-
- 171.3k
- posts
-
- 73.2k
- posts
-
- 218.6k
- posts
-
- 18.9k
- posts
-
- 35.9k
- posts
-
- 685.1k
- posts
-
- 66k
- posts
-
- 556
- posts
-
-
Classic Consoles
-
- 425k
- posts
-
- 132.4k
- posts
-
- 280k
- posts
-
- 3.7k
- posts
-
- 7.7k
- posts
-
- 12.2k
- posts
-
- 12k
- posts
-
- 6.5k
- posts
-
- 14.7k
- posts
-
- 3.6k
- posts
-
- 1.2k
- posts
-
- 2.4k
- posts
-
- 1.4k
- posts
-
-
Classic Computing
-
- 41.2k
- posts
-
- 14.1k
- posts
-
- 239.1k
- posts
-
- 17.4k
- posts
-
- 7.8k
- posts
-
- 7.9k
- posts
-
-
Modern Consoles
-
- 232.6k
- posts
-
- 859
- posts
-
- 725
- posts
-
Atari VCS (Redirect) (8,767 visits to this link)
-
- 10.2k
- posts
-
- 3.3k
- posts
-
- 3.4k
- posts
-
- 22.4k
- posts
-
- 13.4k
- posts
-
- 27.5k
- posts
-
-
Gaming General
-
- 3.1k
- posts
-
- 46k
- posts
-
- 31.7k
- posts
-
- 33.3k
- posts
-
- 16.6k
- posts
-
- 19.9k
- posts
-
- 4.6k
- posts
-
-
Marketplace
-
- 241.2k
- posts
-
- 170.5k
- posts
-
- 51k
- posts
-
- 2.5k
- posts
-
- 14.4k
- posts
-
-
Community
-
- 23.5k
- posts
-
- 16.4k
- posts
-
- 11.9k
- posts
-
High Score Clubs
- 2600 High Score Club
- 5200 High Score Club
- 7800 High Score Club
- Lynx High Score Club
- Jaguar High Score Club
- 8-bit High Score Club
- Vectrex High Score Club
- NES High Score Club
- SMS High Score Club
- ColecoVision High Score Club
- Intellivision High Score Club
- Bally High Score Club
- TG-16/PC Engine High Score Club
- Arcade/MAME High Score Club
- VCS High Score Club
- 2.4k
- posts
-
- 6.7k
- posts
-
- 15.3k
- posts
-
- 2.7k
- posts
-
- No posts here yet
-
- 124
- posts
-
-
Game Programming
-
- 53.7k
- posts
-
- 7k
- posts
-
- 23.8k
- posts
-
-
Site
-
- 6.5k
- posts
-
- 683
- posts
-
- 350
- posts
-
- 17.5k
- posts
-
- 8.2k
- posts
-
- 547
- posts
-
.thumb.jpg.cd1d9322de7b4899e3d9c2f4dba80b78.jpg)
-
Who's Online 71 Members, 7 Anonymous, 253 Guests (See full list)
- 8bitPoet
- 8_is_enuff
- +Allan
- +Al_Nafuur
- Artoj
- Atari8guy
- Atari8man2004
- +atari2600land
- Atari8264
- Atariboy
- AtariSphinx
- big_guitar
- Bosconian
- CapitanClassic
- cbelcher
- +Charlie Cat
- Crash7
- +darryl1970
- DaveM
- +DrVenkman
- eightbit
- fractalus
- Gary from OPA
- h0trod
- Handy DG
- +HatNJ
- JasonACT
- jeffythedragonslayer
- Jess Ragan
- JLsoft
- Joe2k1
- joeatari1
- John Stamos Mullet
- +KaeruYojimbo
- kbarb
- Keir
- +Lee Stewart
- lwdallas
- M-S
- MarkO
- mckafka99
- Mittens0407
- mthompson
- +Nathan Strum
- NE146
- Odysseus
- OldSchoolRetroGamer
- OscarGungan
- pacmanenjoyer
- +PasadenaBrad
- Pixelboy
- +Random Terrain
- Reaperman
- RedShirt36
- reifsnyderb
- Rickster8
- RickyDean
- senior_falcon
- Sir Guntz
- +sramirez2008
- SteveTheColecoDude
- SuperZapperRecharge
- t0spmad
- Terrapin24h
- The Mr. Video
- +Torq
- unhuman
- UnRedeemed
- WhataKowinkydink
- WOPRpwJOSHUA
- Zendocon
-
Member Statistics
65,508
Total Members5,941
Most Online.thumb.jpg.9fda9d706da1a25c138170839eae55fe.jpg)
-
Forum Statistics
338.2k
Total Topics5.4m
Total Posts
.thumb.jpg.9fda9d706da1a25c138170839eae55fe.jpg)
-
Recent Status Updates
-
Another man with a Vs. Tent:
If it were possible, I would invest in a 3D printer that can make replacement CRT parts. Too bad that you can't 3D print glass...
- This update has no replies.
-
-
-
I have a 16k B-Key 400 in box for sale. Asking $100 + shipping from Portland Or. Eightbitfix.com
- This update has no replies.
-
Sammy Davis Jr. claimed to be addicted to Pac-Man. He played for hours on end.
- This update has no replies.
-
-
Recent Posts
-
I should get around to that later this week. -
By Gary from OPA · Posted
Maybe a early beta test release. Or the later control data version. Make a disk image of them and then we can compare to the current known ones. -
Did it not seem evident that he really enjoyed it?? Always trying to get the one-up on somebody. Always trying to get the last word. Always trying to belittle somebody. Always trying to put somebody in their place. Always defending, defending. He just couldn't seem to help himself. Tommy never grew up, never fully matured and was probably bullied a lot when he was a kid. When the internet came along he played role reversal behind his keyboard and monitor. You can't put a child into the role of CEO and expect great things. I would imagine that his wife was more than likely a very lonely woman. IMO Projection is one of his biggest traits. "Projection is when someone attributes their own negative (or positive) feelings, flaws, and other quirks onto someone else or another group, and usually onto someone with whom they are having a disagreement. Someone who projects will shift blame to ignore their problems or weaknesses." Tommy's paper trail is decades long and the internet never forgets. -
Back in the day I played and finished Ys on the Sega Master System, so I totally took a pass on the Turbo CD version when it came out because it was like.. "I already played it". Anyway fast forward decades later and I have it on the TG16 Mini and figure what the heck.. let's give it a shot. And I dug it! However.. eventually it got to the ending maze part and it totally took me back all those years to when I was lost for hours in them and I was like screw this.. I'm done.. and I haven't touched it since. -
It was very... salesdroid-ish.
-
By Jess Ragan · Posted
Music! We've got MUSIC! I managed to plink out a melody on a piano app, then modified an example in Nanochess's book to produce what I'd like to think is a pretty decent success theme. Oh yes, we're getting closer and closer to wrapping things up. (May have to consider a second channel for bass backing. I dunno.) success_audio.rom -
By _The Doctor__ · Posted
4.49g has been fixed, it resolved mostly all strange issues I had with PBI devices. I don't know what the hack would have been, other than simply using the sdx imager utility to add items to the sdx rom/cart image -
The file formats are all documented in the VGMComp2.pdf that's included in the zip (or directly at the download page). At the very end there is an example sequence of the minimum steps to compress a file for the SN, I'll refer back to that again in a moment. In this case, this is a single channel dump. There's metadata in the filename that is important for parsing it - but we can assume that it's 60hz - every one is 1/60th of a second. What's not entirely clear is whether it's a tone or a noise - only the filename identifies that. The first column is the frequency shift rate (IMPORTANT: even if it's noise!). The second column is the volume as an 8-bit ratio (where 0x00 is mute, and 0xff is maximum volume). Noise frequencies have extra flags for periodic and retrigger, but I don't see any here so you can look up the docs if you need them. When you extract a VGM, the toolset writes every channel separately, and preserves as much detail as possible so they are easy to manipulate. When you are ready to play on the SN, you need to adapt the data to fit. You can do this manually - assuming the shift rates are all legal (001 to 3ff). You can divide the volume by 16 and flip it to get the valid range, but I already have a tool in there to do all this for you (and it will map the volume to the logarithmic scale the real chip uses, and clip invalid tones). You already used vgm_psg2psg.exe to extract the VGM. (This reads SN PSG data from a VGM file). In your case you got 1 channel, but you can get all four depending on the music. To prepare it for SN playback, use prepare4sn.exe. This takes in 4 channels (three tone channels and a noise channel) and outputs a combined file with everything processed to be legal on the SN -- shift rates are verified and enforced, noise shift rates are determined and mapped to the correct noise type, and volumes are mapped into the valid range. The output file is very similar to the one you are looking at, except all four channels are on a single line. For example: 0x000B4,0x4,0x000D6,0x5,0x003FF,0x7,0x00004,0x5 Frequency, volume, frequency, volume, frequency, volume, noise type, volume - ready to throw at the chip. In your case, you only have one channel, but you can still use it. Use: prepare4sn.exe mytune.vgm_ton00.60hz - - - mytune.snpsg The "-" means "no input on this channel", so there are three. The output is whatever name you want, but I like "snpsg" to remind me this is processed for the SN sound chip. Feel free to throw a ".txt" on there if it makes it easier to read. The output looks like so: D:\work\TI\vgmcomp2\test>prepare4SN.exe x.vgm_ton00.60hz - - - x.snpsg VGMComp2 PSG Prep Tool - v20240414 Opened tone channel 0: x.vgm_ton00.60hz Channel 1 (tone) free Channel 2 (tone) free Channel 3 (noise) free Imported 27 rows 0 custom noises (non-lossy) 0 tones moved (non-lossy) 0 mutes mapped (non-lossy) 0 tones clipped (lossy) 0 noises mapped (lossy) ** DONE ** In that case, your lines will look like this: 0x00027,0x1,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x00027,0x2,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x00027,0x2,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x00027,0x3,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x3,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x4,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x4,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x5,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x5,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x6,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x6,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x7,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x8,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x8,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x9,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0x9,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0xA,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0xA,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0xB,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0xB,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0xC,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0xC,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0xD,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0xD,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0xE,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0xF,0x00001,0xF,0x00001,0xF,0x00005,0xF 0x0001F,0xF,0x00001,0xF,0x00001,0xF,0x00005,0xF All your data is in the first two columns - note how the volumes are now the correct values for the SN sound chip. Since you know the rest of the data is empty, you can ignore it. Note that although there are 5 nibbles displayed in the tone, that's to leave room for internal flags. You only need to care about the last four - two bytes. (One byte for the noise channel). To play it back, you need to add the command nibbles for the channel you want to play. (My compressor doesn't store that nibble to aid compression). And, unfortunately, the SN requires you to "swizzle" the nibbles. So once you have the bytes (I don't know what your sound code looks like, in C you can just write to "SOUND" if it's set up appropriately), so: const unsigned char myTone[] = { 0x00,0x27,0x1, 0x00,0x27,0x2, 0x00,0x27,0x2, 0x00,0x27,0x3, 0x00,0x1F,0x3, 0x00,0x1F,0x4, 0x00,0x1F,0x4, 0x00,0x1F,0x5, 0x00,0x1F,0x5, 0x00,0x1F,0x6, 0x00,0x1F,0x6, 0x00,0x1F,0x7, 0x00,0x1F,0x8, 0x00,0x1F,0x8, 0x00,0x1F,0x9, 0x00,0x1F,0x9, 0x00,0x1F,0xA, 0x00,0x1F,0xA, 0x00,0x1F,0xB, 0x00,0x1F,0xB, 0x00,0x1F,0xC, 0x00,0x1F,0xC, 0x00,0x1F,0xD, 0x00,0x1F,0xD, 0x00,0x1F,0xE, 0x00,0x1F,0xF, 0x00,0x1F,0xF }; // note, assuming sound chip is at SOUND and a function "waitnmi()" exists for timing void playtone() { unsigned char *pTone = myTone; int bytesleft = sizeof(myTone); unsigned int val; while (bytesleft > 0) { // wait for an NMI to happen for 60hz timing waitnmi(); // handle frequency bytes - some manipulation is required val = ((unsigned int)(*(pTone))<<8) | (*(pTone+1)); // read two bytes into int, MSB first SOUND = 0x80 | (val&0xf); // command nibble and least significant nibble of value SOUND = (val>>4)&0xff; // two most significant nibbles of value // and the volume SOUND = 0x90 | *(pTone+2); // command nibble and volume value (MUST be 0-F) // next row pTone += 3; bytesleft -= 3; } } Hopefully you can extract the missing knowledge from this. Note that this format is intended for two things: - to be input for the compression tool - to be easy to read and manipulate It's NOT intended to be a playback format. As you can see, there is a lot of redundancy and storing every 60hz tick makes the data much larger than it would otherwise need to be. You CAN do this, though... but it'd be better to use the file as input to some other tool that packs in a format you find easier to play. Not sure about the quip that I seem unwilling to help. I'm not willing to rewrite my tools for you, nor to deep dive into the web page generator (which I did not write), but otherwise I think I've stepped in where asked! -
By Gary from OPA · Posted
Some more info: 1.1) Colours Taken from mess/vidhrdrw/tms9928a.c in MESS, by Raphael Nabet. The first 3 columns are taken from the TI datasheet (in volts). The next 3 columns are based on this formula: Y = .299*R + .587*G + .114*B (NTSC) The coefficients are likely to be slightly different with PAL. I assumed the "zero" for R-Y and B-Y was 0.47V. The last 3 coeffs are the 8-bit values. Colour Y R-Y B-Y R G B R G B 0 Transparent 1 Black 0.00 0.47 0.47 0.00 0.00 0.00 0 0 0 2 Medium green 0.53 0.07 0.20 0.13 0.79 0.26 33 200 66 3 Light green 0.67 0.17 0.27 0.37 0.86 0.47 94 220 120 4 Dark blue 0.40 0.40 1.00 0.33 0.33 0.93 84 85 237 5 Light blue 0.53 0.43 0.93 0.49 0.46 0.99 125 118 252 6 Dark red 0.47 0.83 0.30 0.83 0.32 0.30 212 82 77 7 Cyan 0.73 0.00 0.70 0.26 0.92 0.96 66 235 245 8 Medium red 0.53 0.93 0.27 0.99 0.33 0.33 252 85 84 9 Light red 0.67 0.93 0.27 1.13! 0.47 0.47 255 121 120 A Dark yellow 0.73 0.57 0.07 0.83 0.76 0.33 212 193 84 B Light yellow 0.80 0.57 0.17 0.90 0.81 0.50 230 206 128 C Dark green 0.47 0.13 0.23 0.13 0.69 0.23 33 176 59 D Magenta 0.53 0.73 0.67 0.79 0.36 0.73 201 91 186 E Gray 0.80 0.47 0.47 0.80 0.80 0.80 204 204 204 F White 1.00 0.47 0.47 1.00 1.00 1.00 255 255 255 -
By WOPRpwJOSHUA · Posted
Here are the screens at SDX launch, first the normal SDX and then the 'hacked' SDX: norm 'hacked'
-
-
Blog Entries
-
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord