Executable for those who want a look-see without compiling.

Thanks! I am going to try it.

I downloaded this for the autocycle feature (max limit and display) because of the sound problems in the official version. This patch definitely helps as long as you set the limit correctly. Thanks and I hope this gets integrated into official!

I found a serious bug.
Your patch breaks scalers. Playing with advinterp2x/3x crashes.

If you're using the exe, it may be some other changes that are in the build I'm working on that's not in the patch. But perhaps bitumove.

I applied it to my source, then the bug still remain. For example, using hq2x/hq3x/advinterp2x/advinterp3x crashes. I will try it with a clean cvs some time.

Actually those changes did sneak into the patch, and are the cause of the bug. If you replace render_loops.h with that from cvs, you should be good to go.

I've attached a diff sans changes to render_loops.h

That said, I did find one game that has trouble with the modeop optimization; tornado. More bug squashing to do.

With graphicsopt2.diff, seems that the problem was solved. 😀

Just to clarify for Spooon69, auto is still there. If you don't want to think about cycles, just set as auto.

> no more skips or lag from cycle transitions
that's very useful, thanks!

Screen becomes distorted in Prehistorik 2 and bumpy.

I figured it out; needed to include vga.latch.d in the dirty check.

Fixed tornado. Check it against Prehistorik 2 and bumpy.

Any big games that you tested the graphicsopt with? As most of those
(like Quake) use linear access to the graphics memory (mode13/vesa),
i didn't notice any speed gain. Suppose mode12-like games would
benefit from it, or tweaked-mode?

If you look at vga_memory, you'll notice modeoperation is only used by unchained vga(aka tweaked vga at mobygames), and chained/unchained ega modes. Even though wolf3d isn't one of the big games, it runs like a dog and modeoperation is one of its big-o calls, which is what led me to optimizing it. The most efficient is LFB, which does straight array accesses. I think games like quake use the map handler if not LFB. Just to reiterate, it's a 3x speed up just for that function(as shown by gprof), for wolf3d. For other games it will vary. Feh, I still get lost with c++'s inheritance so others may be using the writehandlers that call modeoperation.

ive tested some SVGA games (Z, Quarantine 2, Exhumed, Hioctane, Rise of the Robots...) with your optimizations for some days now.

Z runs like a dream on my system, no sound stuttering with dynamic core above 60000 cycles anymore. also hioctane seems to benefit from the optimizations.

but quarantine 2 is unplayable. gamespeed goes from high to very slow all the time in hires. screen tearing and sound stuttering also. ive tryed many different settings without any better results.

SysGOD, if I am right, you applied svga patch, right?
Did you modify some lines in graphicsopt patch against SVGA patch?

ih8registrations, the third patch made the screen of prehistorik 2 much worse. There's still a bug in bumpy.

SysGOD, if I am right, you applied svga patch, right?

no iam only using the precompiled dosbox.exe for now.
dont have any compilers on my system yet...

maybe ih8registrations has some other things changed in his .exe, i dont know.

Where in and prehistorik 2 and bumpy do the corruptions/bugs show up?

Here is a screenshot.