Search found 152 matches

by ecksemmess
Mon 03 Sep, 2018 8:52 pm
Forum: General
Topic: PCem and laptop i7 8550u CPU
Replies: 6
Views: 530

Re: PCem and laptop i7 8550u CPU

FYI, I've been using PCem on an Ivy Bridge-era laptop for years, with pretty good results. I can maintain near-100% emulation for anything up to a Pentium-133 or so, though it does of course depend heavily on what the emulated system is doing. My laptop's CPU is an i7-3632QM, base speed 2.2GHz and t...
by ecksemmess
Mon 03 Sep, 2018 8:43 pm
Forum: General
Topic: [REQUEST] ATI Graphics Ultra Pro
Replies: 13
Views: 1092

Re: [REQUEST] ATI Graphics Ultra Pro

From what I understand, v15 is supposed to have a totally redone recompiler, which is hardly "bugfixes"! I'm not privy to any inside information about what will be in it, but I have a feeling a lot of people will be pleasantly surprised.
by ecksemmess
Wed 29 Aug, 2018 2:57 am
Forum: General
Topic: [REQUEST] ATI Graphics Ultra Pro
Replies: 13
Views: 1092

Re: [REQUEST] ATI Graphics Ultra Pro

Seconding leilei. It's an incredibly inefficient use of valuable time to have Sarah (or anyone else who's very deep in the PCem codebase) attending to requests that actually don't require much special expertise to carry out. The ATI Graphics Ultra Pro request is maybe not the best example (I'm not s...
by ecksemmess
Sun 06 May, 2018 7:10 am
Forum: Development
Topic: Speed improvement
Replies: 3
Views: 866

Re: Speed improvement

PCem's CPU emulation is powered by an interpreter ( https://en.wikipedia.org/wiki/Interpreter_(computing) ) and a dynarec ( https://en.wikipedia.org/wiki/Dynamic_recompilation ). The pre-486-class systems use the interpreter, the Pentium-class systems use the dynarec, and the 486-class systems allow...
by ecksemmess
Wed 25 Apr, 2018 6:51 am
Forum: Patches
Topic: [Patch] Cleanup
Replies: 2
Views: 467

Re: [Patch] Cleanup

endeavor/1006cb0_.bi0 and revenge/1009af2_.bi0 are absolutely included in the code, in mem.c, and always have been. I'd suggest double-checking that again; hopefully you didn't remove any references to those, as they are entirely necessary to the basic functionality of the Endeavor and Revenge. pc15...
by ecksemmess
Mon 23 Apr, 2018 9:14 am
Forum: General
Topic: Ryzen
Replies: 11
Views: 2516

Re: Ryzen

I can confirm that the Windows 8.1 patches for Spectre/Meltdown have had no noticeable impact on PCem performance on my Ivy Bridge-based system.
by ecksemmess
Mon 16 Apr, 2018 4:19 am
Forum: General
Topic: [Bug] Window size changes when leaving fullscreen
Replies: 5
Views: 620

Re: [Bug] Window size changes when leaving fullscreen

Hey, thanks for doing that testing. I can confirm your observations about the second way to trigger the bug. Just to clarify for all reading this: as you'll notice from the reports above, the fullscreen toggle trigger that I reported in the OP does occur when Video -> Resolution is set to "Custom", ...
by ecksemmess
Sat 14 Apr, 2018 6:31 pm
Forum: General
Topic: [Bug] Window size changes when leaving fullscreen
Replies: 5
Views: 620

Re: [Bug] Window size changes when leaving fullscreen

Can anyone reproduce this? It should only take a moment to check. Not the end of the world, but it can get unwieldy as the window just grows and grows when there's a need to toggle back and forth several times between windowed and fullscreen. It would be helpful to know if this is specific to my set...
by ecksemmess
Wed 28 Mar, 2018 7:11 pm
Forum: General
Topic: Configuration errors on model 70 type 4
Replies: 9
Views: 1073

Re: Configuration errors on model 70 type 4

That's good to know. It'd be a nice addition, understandable that it wouldn't be a priority of course. Maybe someday... :)
by ecksemmess
Tue 27 Mar, 2018 10:29 pm
Forum: General
Topic: Configuration errors on model 70 type 4
Replies: 9
Views: 1073

Re: Configuration errors on model 70 type 4

Bit-accurate x87 emulation requires 80-bit floating point operations, as that's what x87 uses internally. If the host CPU's FPU was used to do this, this will destroy any chance of porting PCem to any architecture other than x86, because all other modern architectures support 64-bit as a maximum. T...
by ecksemmess
Sun 25 Mar, 2018 9:47 pm
Forum: General
Topic: [Request] Improve Hard Drives timings
Replies: 3
Views: 699

Re: [Request] Improve Hard Drives timings

It's not just about accuracy/authenticity (though IMO that's reason enough to care about this). I definitely have run into various early-80s era software that throws unexpected behavior in PCem under certain circumstances which appears to be due to the lack of expected HDD access delays. Can't remem...
by ecksemmess
Sat 24 Mar, 2018 10:51 pm
Forum: General
Topic: Custom resolution isn't set on the next time PCem is started
Replies: 2
Views: 423

Re: Custom resolution isn't set on the next time PCem is started

Just a shot in the dark, but could this be related to the bug I reported at viewtopic.php?f=2&t=2963?
by ecksemmess
Tue 20 Mar, 2018 8:08 pm
Forum: General
Topic: [Request] Improve Hard Drives timings
Replies: 3
Views: 699

Re: [Request] Improve Hard Drives timings

This would be an excellent addition for sure.
by ecksemmess
Tue 20 Mar, 2018 8:07 pm
Forum: General
Topic: [Bug] Window size changes when leaving fullscreen
Replies: 5
Views: 620

[Bug] Window size changes when leaving fullscreen

Just a minor but annoying bug, probably quite easy to track down and would be nice to get it stamped out for v14. Steps to reproduce: - Set Video > Resolution to anything other than "Original". - Set Video > Remember Size & Position. - Set Video > Output stretch-mode to anything other than "None". -...
by ecksemmess
Sun 18 Mar, 2018 7:32 am
Forum: Development
Topic: [REQUEST] CD-ROM speed
Replies: 10
Views: 1567

Re: [REQUEST] CD-ROM speed

Awesome idea, thanks for adding this! I see that 56x is missing from the list of available speeds--any particular reason for that? I realize that the accuracy is iffy toward the higher end of the speed range in this implementation, but just about every other common speed now seems to be accounted fo...
by ecksemmess
Tue 06 Mar, 2018 11:50 pm
Forum: Development
Topic: [Request] Lo-tech 2MB EMS Board
Replies: 2
Views: 678

Re: [Request] Lo-tech 2MB EMS Board

If someone is going to go to the trouble of adding an EMS board to PCem, I'd much rather see a period-accurate one emulated than some recent hobbyist board. Is there anything about the Lo-tech that makes it particularly desirable?
by ecksemmess
Wed 28 Feb, 2018 10:18 pm
Forum: Merged patches
Topic: [Patch] Fix missing tooltip
Replies: 2
Views: 595

[Patch] Fix missing tooltip

Just a quick patch to fix a missing tooltip in the Configuration Manager window. Not a big deal, but I'm sure I'm not the only one who relies on tooltips and has some anxiety about clicking "mystery meat" buttons... :)
by ecksemmess
Sat 24 Feb, 2018 7:51 pm
Forum: Development
Topic: Possible to get ALT+TAB trapped properly?
Replies: 5
Views: 816

Re: Possible to get ALT+TAB trapped properly?

Hmm, that's unfortunate. Thanks for looking into it, Sarah. I know we've got some wxWidgets gurus here, hopefully someone has a clue what can be done about this under Windows... anyone? :)
by ecksemmess
Sat 24 Feb, 2018 7:47 pm
Forum: General
Topic: Gateway 2000 zappa based system
Replies: 1
Views: 396

Re: Gateway 2000 zappa based system

aladd10, as the name suggests, was the BIOS for the Gateway OEM ALi Aladdin motherboard, not the Zappa. The Gateway OEM Zappa is called zappb11. It may just be identical to the standard Advanced/ZP though, with Gateway logos and such added but otherwise no change in features or functionality, in whi...
by ecksemmess
Fri 23 Feb, 2018 6:30 am
Forum: Development
Topic: Possible to get ALT+TAB trapped properly?
Replies: 5
Views: 816

Possible to get ALT+TAB trapped properly?

Sorry if this has been discussed before, but have there ever been any attempts to look into trapping ALT+TAB? As things stand, it's getting sent to both the guest and the host, in fullscreen as well as windowed mode. This, of course, makes it basically impossible to use ALT+TAB on the emulated syste...
by ecksemmess
Fri 23 Feb, 2018 6:18 am
Forum: Merged patches
Topic: [Patch] Xi8088 - GPL XT system bios
Replies: 14
Views: 1634

Re: [Patch] Xi8088 - GPL XT system bios

Looks good! Love your shader setup too--what package/settings is that?
by ecksemmess
Tue 20 Feb, 2018 12:19 pm
Forum: Merged patches
Topic: [Patch] Intel Advanced/ZP
Replies: 11
Views: 1798

Re: [Patch] Intel Advanced/ZP

Loving this, and the recent PB570/CL emulation as well, thank you!
by ecksemmess
Mon 29 Jan, 2018 2:04 am
Forum: Merged patches
Topic: [Patch] Default video timing
Replies: 7
Views: 1503

Re: [Patch] Default video timing

Can't speak to whether it's a great use of your Sunday, but this is excellent stuff! I've been super interested for a long time in knowing how these comparisons would shake out, it's nice to have some hard data.
by ecksemmess
Sat 27 Jan, 2018 7:53 pm
Forum: Development
Topic: [request] Implement onboard chips emulation
Replies: 7
Views: 1276

Re: [request] Implement onboard chips emulation

Funny that this should come up now, I was actually just thinking recently about how nice it would be to have Trio64V+ and Vibra16 emulation in PCem, not specifically the integrated Advanced/EV versions but just generally speaking. I had a couple of standalone Trio64V+ and Vibra16 cards back in the d...
by ecksemmess
Sat 13 Jan, 2018 5:27 pm
Forum: General
Topic: Sound stutters whatever the configuration
Replies: 22
Views: 1872

Re: Sound stutters whatever the configuration

What renderer are you using (Settings->Render driver)? That's the only thing that is likely to cause a performance regression - for just about everyone else v13.x is faster than v12... I haven't been having any of szadycbr's issues but this is good to know, thanks. I usually just leave the render d...
by ecksemmess
Mon 08 Jan, 2018 8:56 pm
Forum: Development
Topic: Execution rate at DOS prompt, menus, etc.
Replies: 5
Views: 815

Re: Execution rate at DOS prompt, menus, etc.

No problem at all, I'll hold off on digging further into this until the recompiler rework is done. (Just as a point of order, the observation I was trying to make was that the Win9x shutdown screen does not have anything even close to the same performance behavior as the DOS prompt idle loop, which ...
by ecksemmess
Mon 08 Jan, 2018 1:33 pm
Forum: Development
Topic: Execution rate at DOS prompt, menus, etc.
Replies: 5
Views: 815

Re: Execution rate at DOS prompt, menus, etc.

Just noticed another major recompiler choker: the "it's now safe to turn off your computer" screen after shutting down Win9x. The level of slowdown is exactly the same as the "no boot device" idle loop I mentioned above, suggesting that they may both be caused by the same recompiler weak point. Once...
by ecksemmess
Sat 06 Jan, 2018 10:52 am
Forum: General
Topic: PCem 13.1 HDD problem
Replies: 11
Views: 1590

Re: PCem 13.1 HDD problem

Not sure if it's related at all, but I've noticed that the BIOSes of all machines behave exactly this way (completely failing to see that any HDD is installed at all) if the HDD image file is read-only. I ran into that once and was tearing my hair out for a while until I figured it out. PCem should ...
by ecksemmess
Sat 06 Jan, 2018 7:31 am
Forum: Development
Topic: Execution rate at DOS prompt, menus, etc.
Replies: 5
Views: 815

Execution rate at DOS prompt, menus, etc.

Finally getting a chance to play around with PCem 13.1, and sure enough, it looks like some of those recent dynarec tweaks have MASSIVELY improved execution rates at the DOS prompt, game menus, and other idle-loop areas that previously brought the emulator to its knees. These loops do still cause no...
by ecksemmess
Thu 04 Jan, 2018 11:57 pm
Forum: Merged patches
Topic: [Patch] Intel Advanced/ZP
Replies: 11
Views: 1798

Re: [Patch] Intel Advanced/ZP

Excellent work, EluanCM! This is great to see, and something I've been looking forward to ever since you first brought up your interest in it many months ago. Thanks for sticking with it. Hopefully Sarah will commit this patch after she returns from her much-deserved break... :)