Re: DOSBox-X branch

Posted on 2019-02-02, 13:56

by

by jmarsh

in DOSBox Patches

in DOSBox Patches

The problem may not be related to just the difference in precision, fpu_instructions.h is a very minimal x87 implementation that doesn't always take FP exceptions when it should or set flags correctly for many instructions. Using "long double" won't fix that. Intel made a utility to test for correct …

---

Re: PowerPC Dynamic Recompiler (patch)

Posted on 2019-02-01, 10:24

by

by jmarsh

in DOSBox Development

in DOSBox Development

Afaict that's a different ISA. PowerPC (what this dynrec is) branched off from the POWER line, so while they have a similar base they're not compatible.

---

PowerPC Dynamic Recompiler (patch)

Posted on 2019-01-31, 18:45

by

by jmarsh

in DOSBox Development

in DOSBox Development

So I started this over 5 years ago, left it unfinished for a few years and now started from scratch and got it into a fit state for submitting... This patch adds a dynamic recompiler for 32-bit PowerPC, based on the existing dynrec framework. I've only tested it on a wii but there should be no …

---

Re: Serial mouse support is NEEDED for this game.

Posted on 2015-03-25, 13:14

by

by jmarsh

in DOSBox Development

in DOSBox Development

That just means I submit a change to the code. It allows somebody else to patch their copy of the DosBox EXE file, to give their own copy of the EXE file the same feature as my compiled modded version of the EXE file. That's assuming that they have the same tool to apply the patch as I have to make …

---

Re: Serial mouse support is NEEDED for this game.

Posted on 2015-03-25, 10:52

by

by jmarsh

in DOSBox Development

in DOSBox Development

Are you unfamiliar with the concept of submitting a patch?

---

Re: CD audio pre-emphasis and its implications for DOSBox

Posted on 2015-01-23, 19:35

by

by jmarsh

in DOSBox General

in DOSBox General

Perhaps, if enough games could benefit, but otherwise I don't think it would be worth the effort. Analog domain audio processing seems kind of heavy to run in parallel with emulation for the single-threaded DOSBox, but supporting DSP plugins on a separate CPU thread could have lots of interesting …

---

Re: CD audio pre-emphasis and its implications for DOSBox

Posted on 2015-01-23, 16:36

by

by jmarsh

in DOSBox General

in DOSBox General

It looks like pre-emphasis can be signalled in the CUE file using the FLAGS command, maybe dosbox could look for this and automatically apply de-emphasis during playback?

---

Re: Can anyone help me get DOSBox running on my PPC Mac?

Posted on 2014-09-24, 11:05

by

by jmarsh

in DOSBox General

in DOSBox General

Still a work in progress.

---

Re: Date & Time Mismatch?

Posted on 2014-02-22, 09:39

by

by jmarsh

in DOSBox Games/Apps

in DOSBox Games/Apps

There are already third-party forks that have implemented it for some platforms.

---

Re: Date & Time Mismatch?

Posted on 2014-02-22, 08:21

by

by jmarsh

in DOSBox Games/Apps

in DOSBox Games/Apps

Or they could just use "set arj_sw=-c" like has already been suggested.

---

Re: New util for DosBox users.

Posted on 2014-02-22, 07:40

by

by jmarsh

in DOSBox General

in DOSBox General

Can you make a proof-of-concept build with FLAC enabled and we'll use it as an excuse to pester gog.com to stop packaging cd audio tracks in lossy formats? 😁

---

Re: New util for DosBox users.

Posted on 2014-02-22, 07:26

by

by jmarsh

in DOSBox General

in DOSBox General

collector wrote: Now if only DOSBox supported more audio formats. It should work with anything supported by the SDL_Sound library, what other unhandled formats would you want to use?

---

Re: Date & Time Mismatch?

Posted on 2014-02-22, 07:03

by

by jmarsh

in DOSBox Games/Apps

in DOSBox Games/Apps

FeedingDragon wrote: What I was semi-asking was.... Isn't there a file library in standard C++ (the language DOSBox code "appears" to be written in,) that has file date/time commands? There is not, that is precisely the problem.

---

Re: Date & Time Mismatch?

Posted on 2014-02-22, 05:02

by

by jmarsh

in DOSBox Games/Apps

in DOSBox Games/Apps

but thats kind weird though, in *nix realm we have "touch" program, on dos realm, i remember Norton Utilitiess have a program called "FD.exe" or "File Date", which thanks to compatibility, also works on 32-bit windows regardless the underlying FileSystem (FAT/NTFS). there also "touch" for windows …

---

Re: Date & Time Mismatch?

Posted on 2014-02-22, 00:50

by

by jmarsh

in DOSBox Games/Apps

in DOSBox Games/Apps

Most file I/O functions are not different on every platform... stat(), open(), read(), write() etc. There is no standard equivalent function to set the timestamp of a file to a specific value, most platforms don't even have their own function for it.

---

Re: FastDosbox 1.6

Posted on 2014-02-19, 13:40

by

by jmarsh

in DOSBox Development

in DOSBox Development

In addition, I ran # apt-get source dosbox Then performed a diff with fastdosbox's source. There are countless changes, especially in the CPU core. There really aren't, if you ignore whitespace changes (and compare against say, dosbox SVN r3783 since fastdosbox is missing a lot of more recent …

---

Re: FastDosbox 1.6

Posted on 2014-02-19, 05:25

by

by jmarsh

in DOSBox Development

in DOSBox Development

But if that's true, why then is it so much faster on benchmarks like topbench even when I use the fastdosbox-CVS.conf setting in my dosbox.conf? If fastdosbox only changed configuration options, they would run at the same speed. Those two statements are contrary to each other. If you can take the …

---

Re: FastDosbox 1.6

Posted on 2014-02-18, 22:32

by

by jmarsh

in DOSBox Development

in DOSBox Development

Pickle wrote: I wonder if people are paying $1 to have the dynamic core turned on for them... I think you're right... there's barely any noteworthy changes in the source code, besides making the default core "dynamic" instead of "auto".

---

Re: Upscaling DosBox recordings (ZMBV Errors)

Posted on 2014-01-22, 13:01

by

by jmarsh

in DOSBox General

in DOSBox General

The issue is not Virtualdub (which is "modern" - latest release was last October), it's an issue with installing the codec - right-click on the "Install movie codec" entry on the start menu and choose "Run as administrator". Then use 32-bit (not 64-bit) virtualdub for editing.

---

Re: CPU_IRET function issue

Posted on 2014-01-22, 03:13

by

by jmarsh

in DOSBox Development

in DOSBox Development

I think it would help if we had the .exe you're trying to run.

---