Re: DOSBox console mode.

Posted on 2020-04-17, 22:16

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by latalante

in DOSBox Development

in DOSBox Development

Just one hint, any files created in DOSBox will be created with UPPERCASE filenames, regardless if you specify the output file in upper or lower case. This is important, because unlike Windows, Linux like any Unix is case sensitive, so you can have a file named BAR, bar, Bar, etc all in the same …

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Re: Qemu On Windows - DOS machine - Keyboard arrows problem (double press detected in some Filemanagers)

Posted on 2020-02-18, 18:32

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by latalante

in PC Emulation

in PC Emulation

I have tested both patches a little bit. I applied both to qemu-4.2.0. Everything seems to work correctly under gtk (-display gtk). With SDL2 (-display sdl), the use of backspace, shift, cursor suddenly stops responding to pressed keys. edit: Too quick assessment again. Under gtk, running quake and …

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Re: Qemu On Windows - DOS machine - Keyboard arrows problem (double press detected)

Posted on 2020-02-18, 13:44

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by latalante

in PC Emulation

in PC Emulation

I think I was in a hurry. Unfortunately, but this patch generates more problems than it solves, after a short time the keyboard completely stops working. I use Linux. Compiling qemu 4.2 under Windows is a rather non-trivial task. Only for experienced people with full necessary toolchain installed.

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Re: Qemu On Windows - DOS machine - Keyboard arrows problem (double press detected)

Posted on 2020-02-18, 10:41

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by latalante

in PC Emulation

in PC Emulation

The cursor keys on the numeric keypad work correctly. However, recompile qemu. This old trivial patch fixes this bug. https://github.com/pld-linux/qemu/blob/b4d7fbfb3f2dab73ba8af5155e2dad61083ad7fc/qemu-dosguest.patch Initially, I tested this patch, but it turned out to be completely ineffective. …

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Re: Issues with new video recording commit r4314

Posted on 2020-02-07, 11:31

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by latalante

in DOSBox Development

in DOSBox Development

plays without any stuttering

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Re: Issues with new video recording commit r4314

Posted on 2020-02-07, 10:23

by

by latalante

in DOSBox Development

in DOSBox Development

Through not sure how it helps if it didn't play on x86. for me it plays correctly under linux x86-64, mpv 0.32.0 mpv --video-unscaled=yes aladdin_000.avi (+) Video --vid=1 (zmbv 320x200 70.086fps) (+) Audio --aid=1 (pcm_s16le 2ch 44100Hz) File tags: Comment: DOSBox git [autoconvert] Converting pal8 …

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-12-10, 14:00

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by latalante

in DOSBox Development

in DOSBox Development

@dreamer, @krcroft Yes, I used an jmarsh 's additional patch. Only he does not affect the results in mp3 encoding with the help of lame and in lua (alioth-benchmarksgame). I didn't post these results. The difference was equally clear. I enjoy this huge improvement in 64-bit performance (great work …

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-12-10, 01:27

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by latalante

in DOSBox Development

in DOSBox Development

I ran some tests and the two are roughly identical, within the noise of my system. I was referring to pre-release builds. Specifically this build. It didn't seem too optimal. LD_PRELOAD=./libpng12.so ./dosbox --version DOSBox version v0.75.0-pre-220-g78cc6 Tested on the same kernel with mitigations …

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-12-09, 22:30

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by latalante

in DOSBox Development

in DOSBox Development

Do you mean dosbox-staging as in: https://github.com/dreamer/dosbox-staging? (Your shell commands shows DOSBox SVN). Yes "my build".. what architecture, compiler, and optimization flags did you use? This thread is for 64-bit architecture. Look here. https://www.vogons.org/viewtopic.php?f=32&t=67673 …

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-12-09, 21:54

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by latalante

in DOSBox Development

in DOSBox Development

I tested the dosbox-staging version yesterday and the results were clearly lower than my build. I upload my compilation here if anyone wants to compare. https://drive.google.com/file/d/1L12wqanCgbojYM9UPFOj9crhcQOWrYk7/view?usp=sharing It was built under the new version of the C library (glibc-2.30) …

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Re: Old software you miss the most

Posted on 2019-12-08, 18:38

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by latalante

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As of 2018, current x86 CPUs (including x86-64 CPUs) are able to boot real mode operating systems and can run software written for almost any previous x86 chip without emulation or virtualization. https://en.wikipedia.org/wiki/Real_mode

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Re: Date - Setting the date for DOSBox only

Posted on 2019-12-08, 12:47

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by latalante

in DOSBox General

in DOSBox General

ripsaw8080 wrote: SVN has a DATE command. In 0.74 you can use the 4DOS shell to get a DATE command. I read that only the SVN version has the date built-in command. If it also exists in older versions, then an external program is actually unnecessary.

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Re: Date - Setting the date for DOSBox only

Posted on 2019-12-08, 11:39

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by latalante

in DOSBox General

in DOSBox General

You can use date from the GNU shtool package (requires cwsdpmi). ftp://ftp.delorie.com/pub/djgpp/current/v2gnu/shtl208b.zip ftp://ftp.delorie.com/pub/djgpp/current/v2misc/csdpmi7b.zip Copy code to clipboard 1 date.exe -s 1995-12-08 2 date.exe +%D 3 date.exe +%Y-%M-%d

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-12-03, 21:20

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by latalante

in DOSBox Development

in DOSBox Development

i5 2500K (Sandy Bridge). Linux 64-bit. Quake timedemo demo1 average of 5 runs each. cycles max, core dynamic. Before: 105FPS. After: 117FPS. You could tell under what specific system you were running your binaries. Your results are unbelievably low compared to my older and much slower processor. …

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-12-03, 12:13

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by latalante

in DOSBox Development

in DOSBox Development

Intel(R) Core(TM) i5 CPU M 450 @ 2.40GHz Linux 5.4.1 dosbox-svn-r4296, gcc-4.9.4, x86_64, (the second result with the patch applied) D1: VAX MIPS rating: 115.27 116.38 PCBench: 70.6 75.4 quake 1.06 with sound, demo1 320x200: 102.5 107.1 800x600: 28.4 32.8

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Re: dynrec vs. secure platforms - opinions wanted

Posted on 2019-11-08, 22:22

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by latalante

in DOSBox Development

in DOSBox Development

Under Linux it is most convenient to test using systemd. It's more widely available than SELinux. MemoryDenyWriteExecute has been available since version 231 (over three years since release). systemd-run -G --user -p MemoryDenyWriteExecute=yes /usr/bin/dosbox systemctl --user status run- …

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-10-16, 09:11

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by latalante

in DOSBox Development

in DOSBox Development

The Mp3 Lame encoder very heavily uses the dosbox FPU functions (FPU_FLD_32, FPU_FST_32), it doesn't show the difference between Intel Xeon and Core 2 (coding times under 64-bit dosbox are very similar). However, the Dhrystone benchmark performs much better, it clearly shows the disproportions.

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-10-15, 15:10

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by latalante

in DOSBox Development

in DOSBox Development

The dynamic core always uses FSAVE/FRSTOR regardless of the host CPU's capabilities Thanks for this information. plus the Dhrystone benchmark is specifically designed to not test floating point performance. only emulated processor? Is this benchmark reliable? I wondered why he achieved such high …

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-10-15, 13:00

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by latalante

in DOSBox Development

in DOSBox Development

Different processor models different disparities between 32-bit and 64 versions. cat /proc/cpuinfo vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 CPU T7200 @ 2.00GHz dmesg | grep 'x86/fpu' [ 0.000000] x86/fpu: x87 FPU will use FXSAVE dosbox32 DHRY1ND.EXE - 58.19 ( …

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-10-14, 09:46

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by latalante

in DOSBox Development

in DOSBox Development

Dosbox is not only cpu emulation in the first place graphics. For the game quake (timedemo demo1 800x600) I can see what generates the load. perf top 3.14% dosbox64 [.] Normal1x_8_32_R 2.77% libc-2.30.so [.] __memcpy_ssse3 2.35% dosbox64 [.] RENDER_StartLineHandler 1.62% dosbox64 [.] mem_readd 1.29% …

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