phaeron Posted May 12, 2015 Share Posted May 12, 2015 Unsure if invoking the scanline 240 hires bug would cause DLIs to keep triggering beyond normal display, my guess would be since only PMG can be shown in that area it's a case of probably not for DLIs. Not that I can tell from the schematics. DLI occurs if the delta counter compares equal, that's suppressed in vertical blank, and vertical blank is scanlines 248-7. The hires bug causes ANTIC to send confusing signals to GTIA, but ANTIC itself isn't confused. Similarly, VBI is triggered simply by Y=248, so not much room to go wrong there, either. Sequencing the VBIs with the DLIs is an option but it has to be done exactly right. One extra or missing DLI and you're toast. This includes the first frame, which can be subtly munged if you're not completely studious about clearing every single display state. Testing for the VBI means that at least if you run over somewhere there's a chance the VBI handler will get everything back on track. If you really want to pinch cycles, the STA NMIRES in the VBI handler can go. VBI resets DLI and DLI resets VBI, so it's not normally needed unless you're testing for it in the IRQ routine too. 1 Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3236160 Share on other sites More sharing options...
tebe Posted June 10, 2015 Share Posted June 10, 2015 MCP (XLPaint MAXX) (GR15 interlace, 160x200x16 colors), gfx title: MONSTER_VIDOL original DLI_MCP - 11573 free CPU cycles new IRQ_MCP - 14084 free CPU cycles monster_irq.zip 3 Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3254813 Share on other sites More sharing options...
tebe Posted June 10, 2015 Share Posted June 10, 2015 (edited) IRQ proper version missing command SKCTL = 3 (wrong colors, if file example loaded with POKEY) irq_proper.zip Edited June 10, 2015 by tebe 3 Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3254851 Share on other sites More sharing options...
NRV Posted June 11, 2015 Author Share Posted June 11, 2015 (edited) Nice! .. so basically IRQ's are the "future"? x) Probably I'm going to look at your source to see if I was doing it right all this time.. Edit: Yep it looks similar. From what I see you have two irq's (IRQ and IRQ2), for odd and even frames, one dli (dli0) at the start of the frame (I suppose), to init stimer and irqen, and one vbi. Also you use the same trick of one irq every two scanlines (this seems to be the fastest way, but needs to burn some cycles in the middle..is that what you do with "#cycle #13"? .. is that Mads?). The only differences with my code is that I never use a vbi (I deactivate them and just put a dli there, if I need one at the bottom of the screen), to simplify the NMI handler. Also I only set stimer one time, at the start of a program (not every frame), but my horizontal sync looks more complex because I need to burn some cycles (after calling two "sta wsync" in a row), so the first irq is always called at the same horizontal position (in the scan line). Edited June 11, 2015 by NRV Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3255351 Share on other sites More sharing options...
tebe Posted June 11, 2015 Share Posted June 11, 2015 Nice! .. so basically IRQ's are the "future"? x) has potential p.s. #CYCLE #N its Mads command (generated 6502 empty code, N>1) Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3255456 Share on other sites More sharing options...
Heaven/TQA Posted June 11, 2015 Share Posted June 11, 2015 using IRQs will suffer POKEY channels? Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3255481 Share on other sites More sharing options...
Rybags Posted June 11, 2015 Share Posted June 11, 2015 As a DLI replacement you generally have Pokey in the 16 KHz mode and lose use of a channel so some suffering there. Alternate to that is use a single voice in the 1.79 MHz mode though that means you have an IRQ trigger interval of about 259 cycles at best, though maybe desirable for a time-saving kernal situation like Project-M. Alternate to that is persist with the 64 KHz (default) mode though the suffering there is you have granularity of 28 cycles which doesn't fit in with the 114 cycle scanlines. A possible fix could be to walk through a series of AUDF values - I've not investigated that, possibly there might be some usable series that allows reasonable sync of IRQs to a point on the scanline. The advantage of using 64 KHz mode of course is that most 3 voice music would be unaffected and you have a reasonable range of intervals between IRQs available. 1 Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3255510 Share on other sites More sharing options...
IndusGT Posted November 11, 2015 Share Posted November 11, 2015 Any news on this, is there any ongoing work? Would love to see something new! Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3364996 Share on other sites More sharing options...
retrofan11 Posted January 10, 2016 Share Posted January 10, 2016 (edited) Hi, This is my first post here and I want to wish Happy new year to all. I really like this Wolf3D project on Atari, but I have problem running it with Atari800 emulator under Raspbian Linux on Raspberry Pi. Colors are messed up and doesnt looks like on a real machine. It is interesting that the first version (Project-M1) shows the correct colors. Does this game works properly only on Altrira emulator and whether it can somehow make it to work properly with Atari800 emulator, which is my only choice on Linux? Edited January 10, 2016 by retrofan11 Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3412423 Share on other sites More sharing options...
fujidude Posted January 10, 2016 Share Posted January 10, 2016 Hi Retrofan11! Happy new year to you as well. Sorry I can't answer your question though. Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3412577 Share on other sites More sharing options...
Kr0tki Posted January 11, 2016 Share Posted January 11, 2016 Atari800 just isn't accurate enough for Project-M. Altirra works okay under Wine, try it out. Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3413221 Share on other sites More sharing options...
retrofan11 Posted January 13, 2016 Share Posted January 13, 2016 Atari800 just isn't accurate enough for Project-M. Altirra works okay under Wine, try it out. I use Raspbian Linux on Raspberry Pi 2 and Wine does not support Arm processor, thats why is Atari800 emulator only choice I have. I was hoping that Project-M author may be able to make a proper version that on Atari800/Win Plus emulator. He offered something like this earlier in thread and I hope that such a thing is possible... Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3414709 Share on other sites More sharing options...
JoSch Posted January 13, 2016 Share Posted January 13, 2016 (edited) You can always try Atari++. You have to compile yourself, though. Edited January 13, 2016 by JoSch Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3414778 Share on other sites More sharing options...
retrofan11 Posted January 13, 2016 Share Posted January 13, 2016 Well, I did, but he also does not run properly Project-M 2.0, colors are messed up on the same way as with Atari800 emulator. Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3414972 Share on other sites More sharing options...
miker Posted January 13, 2016 Share Posted January 13, 2016 Try PM version from here: http://atariage.com/forums/topic/174274-project-m-20/page-4?do=findComment&comment=2167267 1 Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3415045 Share on other sites More sharing options...
+Stephen Posted January 13, 2016 Share Posted January 13, 2016 If I remember correctly, version 2 was changed to use timer IRQs to give more available CPU time. This requires a very accurate emulator. Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3415070 Share on other sites More sharing options...
NRV Posted January 14, 2016 Author Share Posted January 14, 2016 No, version 1 already used the IRQ timers.. probably is something small, like the differences with the display list that Miker corrected in his version, so it worked again in Atari800WinPlus. That version should do it. 1 Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3415179 Share on other sites More sharing options...
retrofan11 Posted January 14, 2016 Share Posted January 14, 2016 Try PM version from here: http://atariage.com/forums/topic/174274-project-m-20/page-4?do=findComment&comment=2167267 It works, thank you so much. 1 Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3415507 Share on other sites More sharing options...
w1k Posted October 8, 2016 Share Posted October 8, 2016 some chance to any news? Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3608398 Share on other sites More sharing options...
miker Posted October 8, 2016 Share Posted October 8, 2016 Every project is presumed dead unless said otherwise. 1 Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3608646 Share on other sites More sharing options...
emkay Posted October 14, 2016 Share Posted October 14, 2016 The big question is : How to get a coder on the A8 to create the best "3D game" with the A8's capabilities? Project-M is marvellous. But, a Wolf 3D clone is possible.... just with some less colours and unusual opcodes of the CPU. 20fps beats even a 386 PC.... and the A8 has the ability of showing typical visuals.... 1 Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3611799 Share on other sites More sharing options...
Kyle22 Posted October 15, 2016 Share Posted October 15, 2016 The big question is : How to get a coder on the A8 to create the best "3D game" with the A8's capabilities? Project-M is marvellous. But, a Wolf 3D clone is possible.... just with some less colours and unusual opcodes of the CPU. 20fps beats even a 386 PC.... and the A8 has the ability of showing typical visuals.... Let's use legitimate 802/816 opcodes. Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3612002 Share on other sites More sharing options...
emkay Posted October 15, 2016 Share Posted October 15, 2016 Let's use legitimate 802/816 opcodes. Let's talk about stock Ataris. Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3612064 Share on other sites More sharing options...
Irgendwer Posted October 15, 2016 Share Posted October 15, 2016 The big question is : How to get a coder on the A8 to create the best "3D game" with the A8's capabilities? Do it like "Kickstarter": Collect money and hope for the best... Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3612065 Share on other sites More sharing options...
TXG/MNX Posted October 15, 2016 Share Posted October 15, 2016 Would it be great if you can utilize the power of the Veronice cartridge in this project.That would give you much extra speed I guess... 1 Quote Link to comment https://forums.atariage.com/topic/174274-project-m-20/page/12/#findComment-3612072 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.