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Filters not working with EGA games?

I tried different filters with the "forced" argument and "aspect" true and false but whenever I start an EGA game there's no filtering going on. I've tried two different DosBox versions but that didn't help, I tried surface and opengl but no luck either. When I start a VGA game everything is fine ( …

Re: How does Sierra's EGA640.DRV even work?

in DOS
weedeewee wrote on 2022-01-15, 20:02: Good_Punk wrote on 2022-01-15, 19:01: I've finally finished the video... you can find it here: https://www.youtube.com/watch?v=ZGjCLLaYFKA 😀 Any chance of adding a list of all the games you showed at the end of the video in the description ? I only know a few …

Re: How does Sierra's EGA640.DRV even work?

in DOS
Ok, seems like Al Lowe doesn't exactly know why they used the EGA640.DRV either. 😄 I wasn’t involved with that driver’s development, so I’m not a good source for you. But there’s one thing I know about AGI and SCI: they were continually evolving, so often that you couldn’t use a driver from May with …

Re: How does Sierra's EGA640.DRV even work?

in DOS
Try contacting Al Lowe for example, his website appears to be still active. https://allowe.com/ And you could try contacting someone from Agdinteractive. I might be able to contact someone I knew years ago. I make no promisses. That's cool, I'll give it a try Try browsing this website: https:// …

Re: How does Sierra's EGA640.DRV even work?

in DOS
@good_punk: Should you make that video it might be a good idea of not just investigating how that driver does its thing but also why it was even created to begin with. That would definetly be interesting... I can try to contact some folks that used to work at Sierra... but I don't have high hopes …

Re: How does Sierra's EGA640.DRV even work?

in DOS
3.) Yes it is very intensive. There's a lot of calculation to be done to get that VGA images converted to EGA with the diterhing. You can actually see that when you turn the Cycles in DosBox down... the game becomes much more demanding when you use EGA. And yes... it is kind of self-defeating but …

Re: How does Sierra's EGA640.DRV even work?

in DOS
3.) The fascinating thing for me is that the art was not produced in EGA but it's all done programmatically. The driver takes 256 color VGA images and through a clever dithering algorithm produces that hi-res EGA output. Yes Sierra were not the only one doing that, it's still very cool in my opinion …

Re: How does Sierra's EGA640.DRV even work?

in DOS
https://gamicus.fandom.com/wiki/Sierra_Creative_Interpreter It seems every game from the SCI1.1 (1.001.xxx) list works perfectly if you add the EGA640.DRV and change the resource.cfg settings. 😀

Re: How does Sierra's EGA640.DRV even work?

in DOS
I think it's the other way around. Larry5 and Police Quest 3 are the SCI 1.0 games and SQ5 is an SCI 1.1 game. So the 1.0 games use the .cur files and don't work properly where the 1.1 games work just fine. :) I don't know if it's possible to upgrade a game from 1.0 to 1.1 and regarding the cursors …

Re: How does Sierra's EGA640.DRV even work?

in DOS
I have put the EGA640.DRV file in the directory of Larry5 and Police Quest 3 (They didn't come with one... at least not in my version) and changed the resources.cfg to use that driver. When I start theses games the mouse cursor is invisible. I've opened the resource files in SCI Companion and …

Re: How does Sierra's EGA640.DRV even work?

in DOS
Not exactly. The older games use a completely different file format for mouse cursors. So I can't just take the images from one of the newer games to replace the cursors. I don't know why the old cursors are incompatible with EGA640 though... they work in the native EGA games just fine but maybe …

Re: How does Sierra's EGA640.DRV even work?

in DOS
Okay, after digging a little deeper with the SCI Companion I've found out that game which still use the 2-Bit .cur files seem to be broken with EGA640.. as in not displaying any mouse cursor at all. Later games that use Views instead of .cur files to show a cursor are working. I've tried to get an …

Re: How does Sierra's EGA640.DRV even work?

in DOS
Peter Swinkels wrote on 2021-12-23, 13:23: @good_punk: I think it was the kq7 demo. Hm okay... I've downloaded a demo version of the game but when I set the driver to EGA640 and run with EGA in DosBox nothing is displayed... you only hear the voice. Might be a wrong version of the demo.

Re: How does Sierra's EGA640.DRV even work?

in DOS
llm wrote on 2021-12-23, 09:53: so there at least only 2 version in all your found drivers D:\Other\g\kq7\INN\EGA640.DRV 1-9-1992 18:57:50 There was an EGA version of King's Quest 7? I thought that game was SVGA only?

Re: How does Sierra's EGA640.DRV even work?

in DOS
I've found out that I could copy the EGA640.DRV from Space Quest 5 over to my Larry 5 and Police Quest 3 version that both didn't include it. The games run but unfortinaetly the mouse cursor is not showing anymore. So my guess would be that you need extra cursor images for EGA and those were only …

Re: How does Sierra's EGA640.DRV even work?

in DOS
FYI, some LucasArts adventure games offer the same kind of dithering with their "e" display option: Monkey Island 256-color, Monkey Island 2, Fate of Atlantis. Yes... I found that out by accident... I had set DosBox zu EGA machine and started MI2. :D (You don't need the display option then) Also …

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