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Applications / Re: OS/4 (technical details only)
« on: March 11, 2019, 02:27:36 am »
Dave, I am still getting traps. This is with the FF sandybridge, OS/4 kernel SVN5452 and your latest libs
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I get the impression that that range extender needs to be powered from the mains which makes it useless if you are out and about.
I use a Tp-Link AC750 WiFi Travel Router that can be powered either from a mains phone chatger or directly from a USB socket. It is small and can be attached to the back of the laptop screen using velcro The setup is via a web browser.
Problem is testing as I don't have AVX hardware.
As indirect way you can describe ps_cos16_1 as Public and always check its address and segment in map file. And, of course, we can ask David to test AVX ver with proper alignment (at least I hope).
For some reason ps_cos16_1 comes to CODE seg (.text ?) but not to .rdata with proper alignment.
OK, I uploaded a version with AVX disabled if you'd like to test.
OK, I uploaded a version with AVX disabled if you'd like to test.
Try moving avcode56.dll and avutil55.dll out of the way and putting the new DLLs in their place
David,OS2user, I am not that savvy with programs like this. I installed it, but don't know how to set it up or what I would use it for.
Do you have a WINx box on your LAN/network that you could try connecting to?
I just tried the SandyBridge version with the lastest OS/4 kernel and FF works now
try this http://hobbes.nmsu.edu/download/pub/incoming/freerdp-wpi-20190301.zip
it also requires AVX
Dave, I just tried the SandyBridge version with the lastest OS/4 kernel and FF works now. Don't know why it did not start before. Cannot test further since I am at work.
I take it you are using the AVX enabled build of the OS4 kernel. Is that bad web page now working for you with avcod56 and the Sandybridge Firefox?
If not I can build some test builds of FFmpeg this evening.
There's already one open about looking into the feasibility of adding AVX support to the IBM kernel, which you probably can't access. Not much there besides a description of the needed feature.
The problem is that during a context switch, the AVX registers need to be preserved. Those registers can be up to 512 bits wide. Think of what happens if two programs are using AVX when the OS switches between them. I doubt that we'll see AVX support in the official kernels anytime soon.
You may have hit on a bug in the OS4 kernel, at least OS4USER is aware of your crash.
Would still be interesting to know what function was crashing in libavcodec though I wouldn't be surprised if something just wasn't aligned correctly. Interesting that the AVX enabled Firefox didn't run for you as well. Did it generate a trp?
Exceptq could also use an update to correctly disassemble AVX opcodes. Luckily Lars can spot them.