Re: DOSBox-X branch

Posted on 2020-11-30, 20:47

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

I tested further. It occurs in PCem with the S3 card, but the flicker is less as expected from dosbox surface output and vesa_* machine types. Then I booted Win95 guest inside dosbox and ran it from a dos box. That showed flickering, too (in the game portion of the window). The evidence weighs …

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Re: DOSBox-X branch

Posted on 2020-11-30, 20:22

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

Could try today's commit: https://sourceforge.net/p/dosbox/code-0/4393/

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Re: DOSBox-X branch

Posted on 2020-11-30, 19:31

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

Arthandas wrote on 2020-11-30, 18:03: ..it flickers just the same even with machine=vgaonly. May test with output=surface and machine=vesa_oldvbe in both dosbox SVN and -X. This assumes a Windows host for dosbox.

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Re: DOSBox-X branch

Posted on 2020-11-28, 22:38

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

In that case, it seems that they deprecated the old API for a new API by renaming the functions. 😀 Seems that the native build for Big Sur has no major practical advantage yet over the Intel build in its emulation layer, although your native build is important to maintain even if that is the case.

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Re: DOSBox-X branch

Posted on 2020-11-28, 21:53

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

And a bug concerning recent SDL12 ARM assembly code for the blit and fill routines: https://bugzilla.libsdl.org/show_bug.cgi?id=4365 Maybe this will be enough patches for now.

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Re: DOSBox-X branch

Posted on 2020-11-28, 21:49

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

These are fixes from recent SDL12 commits to provide audio compatibility with builds for macOS 11.0 ("Big Sur"): --- a/src/audio/macosx/SDL_coreaudio.c Sun Jul 05 22:11:10 2020 +0300 +++ b/src/audio/macosx/SDL_coreaudio.c Fri Jul 17 17:44:34 2020 -0400 @@ -193,7 +208,7 @@ return; } - result = …

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Re: DOSBox-X branch

Posted on 2020-11-28, 21:00

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

Because the Apple M1 emulation will not mix and match between architectures, it may be worthwhile to improve the voodoo emulation, perhaps even add banshee. Here is also a 3dfx voodoo patch against previous code in dosbox-x for hints. There was a recent update to that code in dosbox-x that …

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Re: DOSBox-X branch

Posted on 2020-11-28, 11:19

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

This typecast is optimized out by VS2019's compiler in Release builds, causing only the low 32 bits to be written in any case and a crash when executing the dynamically generated code. Here is another vs2019 issue with type conversion (probably also optimization related): https://developercommunity …

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Re: pentium_fast \ cpu type?

Posted on 2020-10-26, 00:10

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by hail-to-the-ryzen

in DOSBox Development

in DOSBox Development

Another possible factor is the specific compiler's optimization of the code. It is possible for a compiler to have a better tested compilation of code for its default settings and - 1. have a bug in compiling for a non-default cpu type or 2. an expectation that the cpu can decode more than one …

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Re: DOSBox-X branch

Posted on 2020-07-26, 02:22

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

This may help from writing outside the writecache with normal5x/6x: diff -rupN dosbox-orig/src/gui/render_scalers.cpp dosbox/src/gui/render_scalers.cpp --- dosbox-orig/src/gui/render_scalers.cpp +++ dosbox/src/gui/render_scalers.cpp @@ -30,9 +30,9 @@ Bit16u Scaler_ChangedLines[SCALER_MAXHEI Bitu …

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Re: DOSBox-X branch

Posted on 2020-07-26, 02:17

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

Here is a change to consider in the case where a game searches for mode 0x068 and it is not found. It may lead to a reset to an unintended mode in that case. diff -rupN dosbox-orig//src/ints/int10_modes.cpp dosbox/src/ints/int10_modes.cpp --- dosbox-orig//src/ints/int10_modes.cpp +++ dosbox/src/ …

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Re: DOSBox-X branch

Posted on 2020-07-26, 02:13

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

This may help from writing outside the writecache with normal5x/6x: diff -rupN dosbox-orig/src/gui/render_scalers.cpp dosbox/src/gui/render_scalers.cpp --- dosbox-orig/src/gui/render_scalers.cpp +++ dosbox/src/gui/render_scalers.cpp @@ -30,9 +30,9 @@ Bit16u Scaler_ChangedLines[SCALER_MAXHEI Bitu …

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Re: DOSBox-X branch

Posted on 2020-07-26, 02:08

by

by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

Here is a change to consider in the case where a game searches for mode 0x068 and it is not found. It may lead to a reset to an unintended mode in that case. diff -rupN dosbox-orig//src/ints/int10_modes.cpp dosbox/src/ints/int10_modes.cpp --- dosbox-orig//src/ints/int10_modes.cpp +++ dosbox/src/ints …

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Re: DOSBox-X branch

Posted on 2020-07-26, 01:47

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by hail-to-the-ryzen

in DOSBox Patches

in DOSBox Patches

There is a nes emulator for dos that causes repeated logs of unhandled INT2F calls, they correspond to the enabling and disabled of critical sections in Win31. diff -rupN dosbox-orig/src/dos/dos_misc.cpp dosbox/src/dos/dos_misc.cpp --- dosbox-orig/src/dos/dos_misc.cpp +++ dosbox/src/dos/dos_misc.cpp …

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Re: Calculatory inconsistency between DOSBOX/Win and DOSBOX/x86 Linux/ARM

Posted on 2020-06-27, 20:58

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by hail-to-the-ryzen

in DOSBox Development

in DOSBox Development

This thread explains the general issue of fpu emulation in dosbox: https://github.com/joncampbell123/dosbox-x/issues/119 ...core attempts to use the host floating point support to emulate Intel x87 instructions, but it does so by typecasting everything to "double", even 80-bit extended formats. The …

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Re: Favourite 1996 games?

Posted on 2020-05-21, 20:35

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by hail-to-the-ryzen

in Windows

in Windows

I think Descent 2 has better visual quality than Descent 1. The environment seems less bland.

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Re: Looking for a guide for rom modding

Posted on 2020-03-02, 01:58

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by hail-to-the-ryzen

in Console & Arcade Emulation

in Console & Arcade Emulation

https://atariage.com/2600/programming/index.html

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Re: 32-bit OS that will run best on 8MB 386sx-16

Posted on 2019-12-08, 23:12

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by hail-to-the-ryzen

in Marvin \ Software

in Marvin \ Software

A downside is the device driver availability in OS/2 2.x (versus Microsoft Windows 3.x).

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Re: 32-bit OS that will run best on 8MB 386sx-16

Posted on 2019-12-08, 22:37

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by hail-to-the-ryzen

in Marvin \ Software

in Marvin \ Software

http://www.os2museum.com/wp/os2-history/os2-2-1-and-2-11/ OS/2 2.0 came with Windows 3.0, version 2.1 shipped with Windows 3.1 http://www.os2museum.com/wp/os2-history/os2-timeline/ OS/2 2.1—May 1993—Codename Borg (previously Yawl) Internal revision 6.514 (93/04/12), XR02010 Win-OS/2 based on Windows …

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Re: To end the AMD v. Intel debate.

Posted on 2019-12-08, 22:31

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by hail-to-the-ryzen

in Milliways

in Milliways

https://www.cpubenchmark.net/high_end_cpus.html Ranked by CPU Mark performance below: CPU Name CPU Mark Single Thread Rating AMD EPYC 7742 47,365 2296 AMD Ryzen Threadripper 3960X 47,050 3019 AMD EPYC 7702P 46,067 2259 AMD EPYC 7452 38,257 2233 AMD Ryzen 9 3950X 35,913 2997 Intel Xeon W-3175X @ 3. …

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