Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 08:06

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by ggorts_

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It probably just requires a single line change, but it may be related to the inline assembly format between the older and newer gcc. Edit: this is the line that's probably causing the issue in minihwc- #define P6FENCE __asm__ __volatile__ ("xchg %%eax, fenceVar":::"%eax")

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 08:02

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by ggorts_

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I should have built it with the recommended gcc/djgpp version, at least to verify a good build. But this is the only issue. It's only called in minihwc.c, at least I think so. It's referenced in the code block for P6FENCE(). My guess is that the code block isn't read by the compiler or something …

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 07:53

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by ggorts_

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There was just one type of error among many lines in the glide3x source code. I tried to typecast the pointer as intended, but attached is a patch for verification. That patch is wrong. The intention of the original code is to do pointer math as if the pointer is of the casted type. You want …

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 07:39

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by ggorts_

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Ok, I'll try your corrected version for the pointer math.

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 07:38

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by ggorts_

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I think I require nasm.exe. No warnings about it, but I don't see it in my path.

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 07:36

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by ggorts_

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The file linhwc.c is for linux but the minihwc.c is active for djgpp. That explains the difference. Also, I think now that the makefile.dj doesn't require a configure or other prior steps to build.

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 07:25

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by ggorts_

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Here is a hint on the fenceVar once the warnings were enabled in gcc: h5/minihwc/minihwc.c:994:14: warning: 'fenceVar' defined but not used [-Wunused-variable] static FxU32 fenceVar; Edit: I'll try to define this outside the condition block (specific to djgpp): #define P6FENCE __asm __volatile (" …

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 07:07

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by ggorts_

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This doesn't look right either in the source: linhwc.c static FxU32 fenceVar; #define P6FENCE asm("xchg %%eax, %0" : : "m" (fenceVar) : "eax"); but minihwc.c has this: #elif defined(__DJGPP__) || defined (__MINGW32__) #define P6FENCE __asm __volatile ("xchg %%eax, fenceVar":::"%eax") #else #error " …

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 07:04

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by ggorts_

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Thanks, I'll look at the document. Also, it was just a linker error for test00.exe (and others) for that symbol (fenceVar). I verified in the source code for glide3x library that fenceVar is related to a required P6 function (including inline assembly). There is some possibility that the code is …

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 05:16

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by ggorts_

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I agree. I wonder if 3dfx used Mesa to create their binary blob. But I'll work on the automake toward the glide3 binary. I've built from these sources before, just not in djgpp.

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 05:08

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by ggorts_

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Do you think it is even remotely possible to use HDPMI and then access the 3dfxgl mini driver directly? One problem is that HDPMI, I believe, is openwatcom friendly, but the system isn't documented for djgpp.

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 05:06

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by ggorts_

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I would think that glide3x is more opengl compatible. That's a real shame they didn't open source the mini driver, and I wish ID left us the Rendition code, too. :) I saw a somewhat recent post mentioning that glide3x hadn't been used yet in a DOS game and that the API was fairly distinct from …

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 05:00

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by ggorts_

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I've heard about the buffer locking requirement, but didn't know about the clipping. However, there may be code samples to help. Is there Quake2 source code on 3dfx output? Does it translate opengl to 3dfx instructions?

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 04:56

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by ggorts_

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Ok, cool. It may build by default without automake in that case, and there is a small possibility that the above binaries work, but the sdk tests look for fenceVar. I believe that (fenceVar) is part of the P6 requirement which is based on P6 friendly inline assembly. I'll try to look at this …

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 04:47

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by ggorts_

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That's great. It may take some time, but I'll work on this. Duplicate effort will be ok because it requires some automake magic. 😀

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 04:43

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by ggorts_

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Thanks. I built the above with the default makefile set (from h5 directory which corresponds to V3/Banshee cards), so I should customize the build process according to V2 (cvg directory; given those files are available in the version of glide3x). I'll work on this for a while to make sure it's built …

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 03:56

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by ggorts_

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The sdk tests are using the older symbolic naming scheme from 204: _fenceVar. At least I think so, so I'll try to make test00.exe with that change (and the others tests have the same issue).

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 03:44

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by ggorts_

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There was just one type of error among many lines in the glide3x source code. I tried to typecast the pointer as intended, but attached is a patch for verification. Also, attached the resulting libraries, although I can build the sdk tests, too.

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 03:20

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by ggorts_

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That's helpful, thanks. At least the above documents the code for later use. I'll test the glide3 instead. 😀 If I can bypass some errors, I'll post the results for verification.

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Re: Quake2 + Acebot for DOSBox (128mb)

Posted on 2015-07-28, 03:07

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by ggorts_

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The test binary is attached, but only used the presumed working asm code.

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