08 May 2024, 15:02 | #261 |
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Aside from the speed gains from limiting bitplanes, AGA also offers other benefits like sprites being larger and more useful as well as improved throughput over OCS/ECS.
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08 May 2024, 18:05 | #262 |
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AND dual playfield on AGA works as 4+4 bitplanes so 16 and 15 colors, but we also have 16 color sprites that work a bit better and a 24 bit palette, and a copper...
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08 May 2024, 18:37 | #263 |
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08 May 2024, 20:42 | #264 |
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Thanks. Certainly chipset timings are one good reason for sure, as is 32-bit fast ram.
If I'm using Cannonball, I dont expect it to run below an 040. But then, I guess the idea for this game/thread is simply to replace the pathetic conversion of OutRun we got on the amiga, with an authentic port? |
08 May 2024, 20:49 | #265 |
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Well, i still hope to see a playable Outrun (not necessarily faithful) for OCS/ECS, is one of my personal grudges with US Gold port
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08 May 2024, 23:38 | #266 | |
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Quote:
The 14.2 mhz 020 can match the 2 68000’s in the arcade. Outrun arcade had hw sprite scaling. Reassemblers port will run ok on 68040 I believe. Last edited by agermose; 09 May 2024 at 01:23. |
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09 May 2024, 00:55 | #267 | |
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The sprite hw did the drawing from that list. The road hw drew the 2 roads from road data prepared by the 2nd 68000. Last edited by agermose; 10 May 2024 at 23:37. |
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09 May 2024, 01:02 | #268 | |
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256 colours uses 60% more memory and 60% more blitter time, which we don’t have. And AGA is more than just the additional bitplanes. 64 bit sprites, FMODE4, 68020 cpu, 32 bit architecture all help. Last edited by agermose; 09 May 2024 at 01:18. |
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09 May 2024, 01:08 | #269 |
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Spot on. No surprise, you know what you’re talking about.
Last edited by agermose; 09 May 2024 at 01:18. |
09 May 2024, 01:11 | #270 | |
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24 bit colours are used in some places. Adrian is doing a stellar job of bringing Outrun to AGA 32 colour mode. Last edited by agermose; 09 May 2024 at 22:59. |
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09 May 2024, 01:14 | #271 | |
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This port uses too much memory, and AGA hw for OCS. OCS version maybe in the future, but don’t count on it. Other devs maybe? Last edited by agermose; 09 May 2024 at 01:22. |
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09 May 2024, 01:15 | #272 | |
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Quote:
Last edited by agermose; 09 May 2024 at 01:24. |
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09 May 2024, 15:05 | #273 | ||
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I know what you mean. If only we had a port. A port is a 1:1 carry over of the code and graphics; just like Dizzy 2 was ported over from the Amstrad to the Spectrum and C64, and was identical. A conversion is built from scratch, and is an interpretation. So Dizzy 2 is a good convention, but OutRun is a totally bad one. That's why half of the CD32 games are bad, because they are just ports from the A1200. Quote:
Don't forget, Out Run is the game's official name, not Outrun. I've updated this to Playable status on lemon, and added an 'Active' tag as well. You guys please take it easy, I don't like to see burn-outs, I prefer doughnuts. |
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09 May 2024, 16:13 | #274 |
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09 May 2024, 20:28 | #275 |
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link went awol
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09 May 2024, 21:08 | #276 |
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09 May 2024, 22:16 | #277 |
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wrong thread sorry
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10 May 2024, 01:38 | #278 | |
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Not even the likes of Banshee, or Aladdin... They are using more like 64-128 color palette. From what I understand full, 256 color palette is really demanding. It's not like "I have an AGA.. let's turn the 256 color palette, and we are good to go", it's more like a limit of the system, and using all 256 colors will limit you in a wide areas of other things. I am saying all above as a guy who doesn't code, so bear that in mind. As for the colors, I personally did many tests on conversions on Amiga, and I draw on Amiga a lot, and all I can say that above 64 colors (or even 32 colors) doesn't really makes much difference. In these resolutions you really can't tell difference if the image is in 64 or 128 colors.. or even much less if it's 128 compared to 256. But between 8 to 16 - Dear God.. like heaven and hell... between 16 and 32.. much less... but you can still clearly see the difference. But why I really adore Amiga is that we can, whatever numbers of colors that we choose.. we get to pick any color we want from gigantic palette of 4096 colors of oldest Amigas (OCS/ECS) or 16,7 millions colors from AGA. This is SOOO important for anyone who likes to paint, and is so powerful feature for the time... man... It's beautiful in a fantasy way. |
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10 May 2024, 02:54 | #279 |
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The simple fact is that more bitplanes and thus more colours result in higher DMA access to update the screen. Max chipram write for AGA is 7 MB/second which divided by 50 is 140KB per 50th of a second(single 16 colour 320x256 screen is 40Kb), but DMA slots are split across audio, floppy copper, sprites and screen.
So really a game needs to consider these absolute limitations and make the best possible combination of DMA slot usage. |
10 May 2024, 08:13 | #280 |
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It's the same on many systems. Most Snes and Neo-Geo games don't use 256 colors mode for speed and memory reasons.
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