Disabling JIT for WHDLoad games?

[nobody]

Leave only this line in whdload.prefs:

ExecuteStartup=uae-configuration cpu_speed real cachesize 0

And start a whdload game then quit, and run sysinfo.
Do it in both Winuae and fs-uae. Then you will know if it works or not.

[Retro-Nerd]

Easiest workaround: Use FS-UAE 2.6.1 or lower. Or ask Toni if he could update "uae-configuration", so that the newer FS-UAE jit commands are valid too.

[Dunny]

Originally Posted by nobody

Leave only this line in whdload.prefs:

ExecuteStartup=uae-configuration cpu_speed real cachesize 0

And start a whdload game then quit, and run sysinfo.
Do it in both Winuae and fs-uae. Then you will know if it works or not.

No, you won't. Speed isn't the issue - JIT is the issue. Setting cpu_speed real will just slow down the emulator to a 7Mhz '040 so the games will be slower, but graphical glitches due to JIT are still present - c.f. Carrier Command.

Carrier Command runs fine if running from a config with cpu_speed set to max and jit_compiler = 0. Setting JIT on is what causes the graphical errors.

I'll test your suggestion above.

...And the results are in. With WHDLoad prefs set, Dhrystones after running Carrier Command - 9742 in Sysinfo. Carrier Command is still broken.

Disabling JIT, but leaving cpu_speed=max in the fs-uae config file: Carrier Command works fine, no graphical glitches but the screen update speed is much quicker (not as quick as JIT, but still good). Sysinfo after running shows dhrystones of 33690.

So it seems that there is no way (currently known) of disabling/enabling JIT while emulation is running.

[Retro-Nerd]

Not with the current FS-UAE versions and uae-configuration. As i said (haven't tried it though). FS-UAE 2.6.1 or lower should work as discussed earlier.

[nobody]

WinUAE







FS-UAE Linux






The results are almost the same.

[Dunny]

Yes, Nobody, but you're not disabling JIT - that option doesn't work. You're setting "cpu_speed real" which is where the slowdown is coming from.

And slowing down the CPU doesn't fix OCS games. Disabling JIT does. At least for mine.

Test again without the cpu_speed parameter. Set cachesize to 0 and then to 8192 and test each.

[nobody]

Well if you use only cachesize it does nothing. Seems he disabled this feature in newer fs-uae.

[Dunny]

Originally Posted by nobody

Well if you use only cachesize it does nothing. Seems he disabled this feature in newer fs-uae.

Yeah, and that was what disabled JIT previously. I'm gonna trawl through the fs-uae sources tonight and see if I can figure out what he replaced it with - seems that uae-configuration just sends textual config items to the host, so with luck we should be able to get it disabled with the right command.

[nobody]

It works in latest fs-uae "development" linux version.

When I run
uae-configuration cachesize 0
Speed goes from 60x A4000/040 to 2x.

[Dunny]

Oh, excellent. I'll see if I can procure a Linux build from somewhere (don't really want to have to install Linux just to build it!)

[nobody]

Maybe I will just inject that version in amilator USB upload. In fact I already have that working in a USB.

[Dunny]

Please do. That would round things off nicely.

[Dunny]

Would it be a case of simply unsquashing the filesystem, copying fs-uae (and fs-uae.dat) over the already existing files and using mksquashfs to recompress? If so, I may give it a try on the mac.

[nobody]

No it's not enough. You need to run Linux to do it properly.

[Dunny]

Well, it worked anyway.

I now have full speed JIT for productivity and workbench use, and WHDLoad games run at 3x a 4000 '040 speed...

...And Carrier Command works a treat now, thanks!

[nobody]

Ok that's good. When I used windows to uncompress and compress the filesystem it was failing. Anyway I use apt and dpkg so I have to use Linux.

[Dunny]

Originally Posted by nobody

Ok that's good. When I used windows to uncompress and compress the filesystem it was failing. Anyway I use apt and dpkg so I have to use Linux.

I used the mac

Windows couldn't decompress the filesystem properly due to some flags being super-user status. Mac managed it fine.

Be aware that a few things have changed as far as native graphics are concerned, too. keep_aspect no longer functions (though it should do) but now you can set stretching and scaling via options. Check the source changes here for details.

Now that I have pretty much perfect games (aside from some, like Buggy Boy, needing a 68000 for proper speed, but that's a known bug on the whdload tracker) it's time to look at getting this installed on the internal HDD. But before that can be done, I need to figure out some way to be able to modify the config while the emulation is running...

And I need to research how to use gfxboot to get a decent intro in there. A bouncing boing-ball would be nice