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Re: SD/32a or int 03h emulation issue

Posted on 2007-04-08, 07:24

Well, I suppose the main reason is because I'm lazy hehe ;) . SD has limited application today since it is heavily bound to DOS/32A's internal API not supported by other DPMI hosts, obviously. So it doesn't work with Windows, DOS/4GW, Causeway etc. Those who still run native DOS are mostly in …

Re: SD/32a or int 03h emulation issue

Posted on 2007-04-07, 07:55

SD only uses hardware breakpoints (for a variety of reasons) which are not supported in DOSBox. It's possible to hack in SW breakpoint support (INT 3 injection into code segment). Look at "_break_pnt" and "restore_state" fns in sdebug.asm . Remeber that the exception stackframe's format was changed …

Re: DosBox Wish List

Posted on 2005-08-25, 10:03

Is this true for all extenders? The DPMI specification mandates the detection order to be: DPMI, VCPI, XMS, INT 15h (Raw), that is VCPI *before* XMS which is what DOS/32A does. There are however ways to cheat, for example if a VCPI host is present but is inactive, you could theoretically just …

Re: Dark Forces

Posted on 2005-08-23, 01:41

did you release a new version with those fixes? There's a beta at dos32a.sf.net. It's mostly for devs (merged source/bunary distro), but end-users can ignore sources and use the prebuilt exec.

Re: Standing up for Dosbox

Posted on 2005-08-11, 18:18

Normally, a full-screen application has exclusive access to the video buffer. Windowed apps all go through a "window manager" (GDI), since they all share the same screen space. The manager is responsible for z-ordering, clipping, alphablending, v-synch:ing et al. Although most of these ops are …

Re: Standing up for Dosbox

Posted on 2005-08-11, 10:49

As for showing FPS in fullscreen... RivaTuner has a utility entitled RivaTuner Statistics Server which can display FPS for D3D/OGL/DirectDraw apps, windowed and fullscreen. AFAIK it measures the frequency of Front->Back buffer flips.

Re: Terra Nova crashes

Posted on 2005-08-06, 09:16

Exception feb6cc00?! Right. The game installs its own exception handler; the exception report is screwed up, due to the same issue DOS/32A was having with Dark Forces (fixed now). Why it crashes (invokes whichever exception handler this is) in the first place is not clear. Does this happen with DOS/ …

Re: Dos32A question

Posted on 2005-08-05, 08:15

If you have DOS32A installed in C:\DOS32A then add: SET DOS32A=C:\DOS32A SET PATH=%PATH%;C:\DOS32A\BINW to autoexec.bat (or dosbox.conf [autoexec] section). This is what DOS/32A installer does for you if allowed to auto-config the system files. With this setup you can now use STUB32A.EXE instead of …

Re: [ANN]: DOS/32A v7.35 is out

Posted on 2005-08-04, 20:01

but the symptoms are little pauses in video playback every half to full second Weird. Something may be getting called with interrupts disabled, perhaps through a callback. Or it could be DTB being too small. Try changing DTB size: http://dos32a.sf.net/wwwroot/manual/html/util/3f.htm . I don't have …

Re: [ANN]: DOS/32A v7.35 is out

Posted on 2005-08-03, 10:19

For some reason I get random lockups in DF with CVS builds from http://ykhwong.x-y.net/ . Can't reproduce that with my local build of DOSBox (albeit I use MSVC8 Beta2). This is not related to the DivByZero problem, I can still debug the game which appears to be going in an endless loop. PM me about …

Re: [ANN]: DOS/32A v7.35 is out

Posted on 2005-08-01, 01:56

Well, I've fixed it. In other words DF now appears to work correctly with DOS/32A in DOSBox. This might also allow other apps to run with DOS/32A which previously failed. Since there is quite a severe change in the kernel it will require a lot of testing. As a side effect the changes break the …

Re: [ANN]: DOS/32A v7.35 is out

Posted on 2005-07-31, 03:47

Not good. After countless debugging sessions involving a modified version of DOSBox, lots of coffeine and a hammer I've figured out what's wrong with Dark Forces running under DOS/32A. In short, this is a manifestation of "Problem 5" described in http://dos32a.sourceforge.net/wwwroot/manual/html/ …

Re: [ANN]: DOS/32A v7.33 is out

Posted on 2005-04-10, 13:57

I use CVS+D3D, 0.63 retail and 0.63 debugger. Different versions could cause problems but I don't think that's the reason for the crashes. Since the general description of the problem seems to be sporadic failures of a game after it's been running for some time I suspect there might be a latent bug …

Re: [ANN]: DOS/32A v7.33 is out

Posted on 2005-04-08, 08:25

I've been able to reproduce moo2 crash in native WinXP (NTVDM) using the demo version from Atari's website + DOS binary from the latest 1.31 patch. I cannot however get moo2 nor df (demo) to crash in DOSBox; they seem to be working fine with both DOS/32A & DOS/4GW. If anyone has more info or noticed …

Re: [ANN]: DOS/32A v7.33 is out

Posted on 2005-03-14, 11:59

The NTVDM CPU encountered the following illegal instruction CS:03ff IP:0214 OP:617272 And it changes. I think this is useless for your purposes since it doesn't apperar to come from dos/32a. I tried redirecting the output of ORION2 to a file, but it is still empty after the error. I see. Sporadic …

Re: [ANN]: DOS/32A v7.33 is out

Posted on 2005-03-09, 08:30

It's just i tried to sb -r those games and the result is a little unsable under dosbox. Moo2, especially chrashed almost immediatly natively under XP home and did eventually chrash under dosbox after aplying dos32/a. Works normally without modifications (but very slow under dosbox). DOS/32A is not …

Re: [ANN]: DOS/32A v7.33 is out

Posted on 2005-02-24, 19:52

Right. To clarify: "none of the tools require the environment variable to be set" means that the compulsory SET DOS32A= command is no longer *required*, solving the ever annoying "... You need to reinstall DOS/32 Advanced DOS Extender on this computer" copy prevention message. The tools are still …

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