PCem

I see the point, but in most cases standard software won't see any difference?! .. how will the special machine types perform compared to the real machines? Can I expect that for example the Commodore PC30-III emulation will (nearly) have the same performance like the original machine?

There are a lot of special machines emulated. But what is the advantage/disadvantage of using for example an AMI 286 clone vs. Epson PC AX or Dell System 200 ? Are the special systems more accurate emulated ? And if it matters, which one of the 286s models would you recommend ?

hm .. interesting, seems that the green channel has technically a higher brightness level

http://www.vogons.org/viewtopic.php?p=351518#p351518

obviously with vgaonly dosbox tries to be as compatible as possible, so PCem does it correctly ..

What are you running in these screenshots? My own project .. using nothing special, just changing colors in mode 13h the usal way with palette registers .. added the RGB value in the left screen to show the difference, its the color of the field where this color is used. @leilei: its set to svga_et...

Hi,

seems, that DOSBox and PCem (linux) render the colors differently .. colors look too bright in PCem for the 18bit RGB values ?! It doesn't matter, if software or openGL rendering ..



Greetz

TheMechanist

Register 8 isn't currently emulated I'm afraid. I can add it, but probably not until the weekend. Seems, that PCem 13.1 doesn't emulate it .. would be nice for future releases to get a fully emulated crt controller, I guess some games use smooth vertical scrolling and other hacks too .. Btw. PCem 1...

Solved it, libwxbase is not enough, had to install libwxgtk too, now it compiled like charm ! But ./configure --release-build didn't complain about missing libwxgtk, so I had no hint first ...

Hi folks, just tried to compile PCem v13.1, getting a lot of errors regarding wxWidgets: Example wx-app.h:57:29: error: invalid use of incomplete type ‘class wxCommandEvent’ class CallbackEvent: public wxCommandEvent ^ In file included from /usr/include/wx-3.0/wx/wx.h:24:0, from wx-app.h:6, from wx-...

okay, good to know .. I tried to set extended ram to 0 and base ram to 512 / 640 kB, but bios complains .. the only working setup - didnt test more than 1 MB - is setting ram to 512k in both pcem config & bios base memory so far, of course only suitable if 512k are enough for you ..

.. after playing around it doesn't seem to be a PCem issue but a more or less common linux issue .. I deactivated xfwm composition manager, installed compton composition manager, activated glx backend with opengl-oml vsync and now tearing is almost gone, now there is a visible difference when pcem's...

with the excellent new wx/sdl gui screen recording is now very simple and accurate under linux, since the window size and position can be fixed, even on low end machines .. I used kazam which is very straight forward and doesn't require much ressources, it's even available from the offical ubuntu re...

I'm using a internal VSync-wait for my prods to avoid tearing when updating the gfx memory and it's working in DOSBox & real hardware .. when running PCem I see more or less heavy tearing between the frames (emulating i286/16 on i3 / i5, runs at full speed) .. even with the latest mainline. It doesn...

... I've set up an Ami286 clone with 1 MB RAM .. I have no idea what to set in BIOS to get rid of this error when booting, I tried some settings without success .. BIOS tells, there are only 512kb base ram ...

one suggestion - would be nice to have some fixed screen resolutions for window .. you could either stay with fixed & scale, but in that case the window is resized everytime the resolution of the machine changes, or it stays the same window size when set to resizeable, but it's only freehand .. so g...

.. runs very fine ! Excellent gui, I'm very impressed !

Just had to figure out, that pcem now - the right linux way ! - searches for ROMS in .pcem ..

Just installed latest mainline ...

simply two words: fucking excellent ! Great job !!!!

oops .. after I deleted all files and started a new fresh build process (it was interrupted multiple times 'cause some dependencies were not met) it didn't fail !

downloaded the latest repository, tried to build for Ubuntu 16.04 with wx/sdl Build failed with a lot of errors, for example: pcem-wx-shaderconfig.o:(.rodata._ZTV10wxScrolledI7wxPanelE[_ZTV10wxScrolledI7wxPanelE]+0x698): not defined link to `wxScrollHelper::DoShowScrollbars(wxScrollbarVisibility, wx...

OBS-Studio - I'm using OpenGL 2.1 hm .. at least OBS could report, that it didn't found right version instead of simply crashing ..

Cool, will give the new PCem version a try !

OBS Studio - immediately after start, after it failed to create GL context ..

Cool, wx is the the new gui in development ? is the daily snapshot stable or should I wait for v13 ?

OBS Studio crashed with memory violence on Ubuntu 16.04 .. btw. PCem changes window size on Linux everytime the resolution changes (textmode/gfx) and does it too while boot process, is there a way to keep a fixed windows size like DOSBox does, at least on linux it is hard to capture screen that's wh...

... tried VirtualDub (Win7), but didn't get it to work, not my cup of tea .. FFSplit is really cool ! .. will try OBS Studio for Linux ..

can't proof it, maybe, but it's definitately helpful to have more than one benchmark and values that run on real hardware ..

no, not my site, the benchmarks are from 2001 .. but it's hard today to benchmark real hardware since most of it is retired & was thrown in the trash .. checkit is a very accurate benchmark too .. and landmark was the defacto standard at that time ..

oh, seems I misunderstood the percentage value, thought it shows how the emulated cpu is occupied .. then it's clear ..

@Sarah - thx for your explanation ! I tested PCem settings with some dos bechmarks - Checkit 3.0, Landmark 6.0 & topbench .. very close to real machines, very impressive piece of code ! Compare here: http://mastodonpc.tripod.com/bench/speed.html Unfortunately some machine specs - especially type of ...

Ah, interesting .. I discovered something similar when I was testing my adlib sound player for DOS which uses an interrupt (PCem v12 for Linux) .. everything wents fine, when choosing low end machines in PCem up to 486DX40.. but when setting the machine to something like Pentium Overdrive the sound ...

only because of interest .. and what do the video settings internally ? what happens if you choose 8bit or slow 16bit ? Is it linked to cpu clock, approximated data transfer rates or more a rule of thumb ? Is it right that this speed is the speed for transfer between CPU and GfX card ? How does - at...

Hi,

DOSBox has a built-in screen video capture function.

Any recommendations for a Linux & Windows Tool for screen video capturing PCem ? I tried some with linux but didn't find a satisfactory tool especially when it comes to capturing just the screen but not the window border ..

Hi, for testing purposes I'm running pcem with DOS on Ami i286 clone .. But I'm not sure which settings are best to get an emulation that is nearest to a real bog standard i286 (mass market & sold in europe) ... My setup is atm Ami 286/16 Mhz clone with OAK OTI067 Gfx (alternative Ati VGA Wonder 16 ...