+batari Posted August 31, 2020 Share Posted August 31, 2020 1 hour ago, RevEng said: If pokey IRQ was hooked up to IRQ in cart designs, then yes. This isn't the case with present designs, as far as I'm aware. Perhaps it is, in rj1307's prototype? I would imagine that MARIA will mask IRQ when drawing the screen and the 6502 will not be allowed to update digital samples at regular intervals during this time. I could be wrong, but I would guess that MARIA takes priority over anything in the system. It may work while the screen is blanked or maybe when there isn't a lot on the screen, though. Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4621279 Share on other sites More sharing options...
RevEng Posted August 31, 2020 Share Posted August 31, 2020 1 minute ago, batari said: I would imagine that MARIA will mask IRQ when drawing the screen and the 6502 will not be allowed to update digital samples at regular intervals during this time. I could be wrong, but I would guess that MARIA takes priority over anything in the system. It may work while the screen is blanked or maybe when there isn't a lot on the screen, though. Great point ? Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4621281 Share on other sites More sharing options...
RevEng Posted August 31, 2020 Share Posted August 31, 2020 27 minutes ago, Synthpopalooza said: POKEY plus YM or double POKEY no YM as the two options, is not a bad thing. Bus contention would likely mean that neither of the devices would work correctly. Bad thing. Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4621286 Share on other sites More sharing options...
TailChao Posted August 31, 2020 Share Posted August 31, 2020 Maria won't exactly mask a pending IRQ, but rather she fully halts Sally during rendering. As long as whatever device is triggering the IRQ will hold IRQn low until acknowledged, Sally can deal with it whenever rendering is over. Regarding sample playback, a small FIFO is a good idea and wouldn't use too many gates. Sally could get an optional IRQ when it's empty, or near empty, and then copy in more sample data when it's convenient for her. I see a small crystal on the board - if it could be clocked by this (with a programmable rate using a phase accumulator), then you don't have to deal with PHI2 wobbling. But again - if you're all continuously going down this route I recommend working together to spec out a new community standard for audio hardware on a CPLD or FPGA rather than it going in a thousand different directions on every new utterance of a flash card or expansion device. 6 Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4621323 Share on other sites More sharing options...
+Muddyfunster Posted August 31, 2020 Share Posted August 31, 2020 I can also send you a work in progress Danger Zone Rom that has @Synthpopalooza 's funky Pokey special + Tia stuff to test if you like. Couldn't get it to run on Mateos. 3 Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4621326 Share on other sites More sharing options...
Synthpopalooza Posted August 31, 2020 Share Posted August 31, 2020 Curt has passed away ... ?? 2 Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4621360 Share on other sites More sharing options...
RevEng Posted August 31, 2020 Share Posted August 31, 2020 4 minutes ago, Synthpopalooza said: Curt has passed away ... ?? I just read about it over in the XM thread. Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4621369 Share on other sites More sharing options...
rj1307 Posted August 31, 2020 Author Share Posted August 31, 2020 2 hours ago, TailChao said: Maria won't exactly mask a pending IRQ, but rather she fully halts Sally during rendering. As long as whatever device is triggering the IRQ will hold IRQn low until acknowledged, Sally can deal with it whenever rendering is over. Regarding sample playback, a small FIFO is a good idea and wouldn't use too many gates. Sally could get an optional IRQ when it's empty, or near empty, and then copy in more sample data when it's convenient for her. I see a small crystal on the board - if it could be clocked by this (with a programmable rate using a phase accumulator), then you don't have to deal with PHI2 wobbling. But again - if you're all continuously going down this route I recommend working together to spec out a new community standard for audio hardware on a CPLD or FPGA rather than it going in a thousand different directions on every new utterance of a flash card or expansion device. I guess it gets too complex and complicated, it was supposed to be a simple project. 2 hours ago, Muddyfunster said: I can also send you a work in progress Danger Zone Rom that has @Synthpopalooza 's funky Pokey special + Tia stuff to test if you like. Couldn't get it to run on Mateos. Of course, I'll be happy to check it, send it to me at PW. 1 Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4621490 Share on other sites More sharing options...
Synthpopalooza Posted September 1, 2020 Share Posted September 1, 2020 RevEng: I tried putting this into my code: CHANNLTBL: .byte $10,$11,$12,$13 This is intended to address the last 4 channels, by offsetting them 16 bytes from the start of the first POKEY. How would I go about modifying that pokeysound code to allow addressing of $10 thru $13? I'd basically use $00 to $03 for the first four and $10 to $13 for the last 4. Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4621716 Share on other sites More sharing options...
RevEng Posted September 1, 2020 Share Posted September 1, 2020 It's not my code, so I'm not really authoritative on it. It looks like first you'd need to add an extra 4 bytes of memory allocations for pretty much everything that currently has 4 bytes, to track the extra 4 voices. Then you'd look for instances of "#$03" being loaded that are used for loops, and change those to "#$07". That should get you started, though there's probably other stuff that needs to be done that I'm missing on first glance. Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4621734 Share on other sites More sharing options...
rj1307 Posted September 1, 2020 Author Share Posted September 1, 2020 I finally got the ProSystem console so I was able to test NTSC. No problems so far. The picture is not good because I am using the RF output. 12 Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4622322 Share on other sites More sharing options...
+batari Posted September 1, 2020 Share Posted September 1, 2020 I was about to make a comment about contacting the XM team, but that was before I heard the news about Curt's passing. After giving this some thought, I think Curt would want us to keep moving forward. So I will share my knowledge about the issue of the XM sound chips. Years ago, Curt contacted me regarding Concerto and he proposed a way that the two could play nice together. Even if the future of the XM project isn't clear, I will say that a way for a cart to disable the sound chips of the XM was worked out back then. I don't think this method has been shared publicly, so for now I won't disclose details, but just say that I think it is probably safe to go forward with a second POKEY at $0460. If the XM project does continue, any games that wish use a second POKEY at $0460 could include this method for disabling the XM sound chips. 6 Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4622339 Share on other sites More sharing options...
hizzy Posted September 1, 2020 Share Posted September 1, 2020 This looks great! Take my money, please!! Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4622479 Share on other sites More sharing options...
Synthpopalooza Posted September 3, 2020 Share Posted September 3, 2020 (edited) So, a question ... assuming POKEY2 @$460 isn't available, can the POKEY be placed any lower in the 4th page of memory, between $400 and $440? Edited September 3, 2020 by Synthpopalooza Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4624022 Share on other sites More sharing options...
Lynxpro Posted September 3, 2020 Share Posted September 3, 2020 Why on Earth do folks cling to the request to play 2600 games on these 7800 SD projects? Get a HARMONY or an UNO for that. Let these projects purely support the complicated 7800 as it is, and maybe incorporate a couple of things the XM would've tackled. That's enough complexity right there. 12 Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4624037 Share on other sites More sharing options...
Jinks Posted September 4, 2020 Share Posted September 4, 2020 If is does not play 2600 games I for one am 1000% NOT interested!! I have friends I will tell too. Like ubook and instachat. Heck I might even Twoot! ? 1 3 Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4624266 Share on other sites More sharing options...
desiv Posted September 4, 2020 Share Posted September 4, 2020 6 hours ago, Lynxpro said: Why on Earth do folks cling to the request to play 2600 games on these 7800 SD projects? <cough><cough>cuttle cart 2<cough><cough> Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4624335 Share on other sites More sharing options...
+sramirez2008 Posted September 4, 2020 Share Posted September 4, 2020 7 hours ago, Lynxpro said: Why on Earth do folks cling to the request to play 2600 games on these 7800 SD projects? Get a HARMONY or an UNO for that. Let these projects purely support the complicated 7800 as it is, and maybe incorporate a couple of things the XM would've tackled. That's enough complexity right there. Preach it! 2 Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4624349 Share on other sites More sharing options...
rj1307 Posted September 7, 2020 Author Share Posted September 7, 2020 Can someone explain to me what the 32kB (2x16kB) RAM bankswitch is about? Is there any game or demo that uses this? Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4627265 Share on other sites More sharing options...
RevEng Posted September 7, 2020 Share Posted September 7, 2020 Banked RAM is a feature of versaboard and megacart hardware (both @CPUWIZ designs). 7800basic has support for this, but as far as I know nobody has put any software out for it yet. Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4627309 Share on other sites More sharing options...
Lynxpro Posted September 7, 2020 Share Posted September 7, 2020 On 9/3/2020 at 7:17 PM, desiv said: <cough><cough>cuttle cart 2<cough><cough> <Cough> <Cough> Not produced in well over a decade or more, doesn't have any XM/XBoard features, etc. <Cough> <Cough> 1 Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4627342 Share on other sites More sharing options...
desiv Posted September 8, 2020 Share Posted September 8, 2020 19 hours ago, Lynxpro said: <Cough> <Cough> Not produced in well over a decade or more, doesn't have any XM/XBoard features, etc. <Cough> <Cough> The question was "why is it brought up." Not "does it make sense today." ? You also missed the point that the CC2 cost $250 at the time. ? Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4627844 Share on other sites More sharing options...
+Mitch Posted September 8, 2020 Share Posted September 8, 2020 The CC2 never cost $250 new , it was $200, later $150 and it does include many of the XM/XBoard features. (HSC support, POKEY, extra cart RAM) Mitch 1 Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4627884 Share on other sites More sharing options...
Shawn Posted September 8, 2020 Share Posted September 8, 2020 54 minutes ago, Mitch said: The CC2 never cost $250 new , it was $200, later $150 and it does include many of the XM/XBoard features. (HSC support, POKEY, extra cart RAM) Mitch And the last of the CC2's that Chad couldn't sell got discounted even further towards the end if I recall correctly. Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4627917 Share on other sites More sharing options...
desiv Posted September 8, 2020 Share Posted September 8, 2020 (edited) 1 hour ago, Mitch said: The CC2 never cost $250 new , it was $200, later $150 and it does include many of the XM/XBoard features. (HSC support, POKEY, extra cart RAM) Mitch In that case, I need to talk to Chad, because pretty sure I paid $250. Nope, I lied... $210 with shipping... Just checked my email receipt. For some reason I was thinking $250. My bad on that.. Edited September 8, 2020 by desiv Quote Link to comment https://forums.atariage.com/topic/310150-dragonfly-my-version-of-the-atari-7800-sd-cartridge/page/4/#findComment-4627928 Share on other sites More sharing options...
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