Re: [Qemu-ppc] (What happened to the pci_databases.c?) Adding Voodoo2 emulation.

[G 3]

On Feb 16, 2017, at 9:29 AM, address@hidden wrote:

> Message: 3
> Date: Thu, 16 Feb 2017 09:28:55 -0500
> From: Jd Lyons <address@hidden>
> To: address@hidden
> Subject: Re: [Qemu-ppc] (What happened to the pci_databases.c?) Adding
>         Voodoo2 emulation.
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset="utf-8"
>
>
> > On Feb 16, 2017, at 6:58 AM, Jd Lyons <address@hidden> wrote:
> >
> >
> > > On Feb 15, 2017, at 10:16 PM, G 3 <address@hidden> wrote:
> > >
> > >
> > > On Feb 15, 2017, at 10:02 PM, address@hidden wrote:
> > >
> > > > Message: 2
> > > > Date: Wed, 15 Feb 2017 15:03:10 -0500
> > > > From: Jd Lyons <address@hidden>
> > > > To: Mark Cave-Ayland <address@hidden>,
> > > >         address@hidden
> > > > Subject: Re: [Qemu-ppc] (What happened to the pci_databases.c?)  
> > > > Adding
> > > >         Voodoo2 emulation.
> > > > Message-ID: <address@hidden>
> > > > Content-Type: text/plain; charset=utf-8
> > > >
> > > >
> > > > > On Feb 15, 2017, at 2:07 PM, Mark Cave-Ayland <mark.cave- 
> > > > > address@hidden> wrote:
> > > > >
> > > > > On 15/02/17 13:32, Jd Lyons wrote:
> > > > >
> > > > > > Hmmmmm??? I think I downloaded it correctly, as a submodule,  
> > > > > > but I don?t understand how to build it?
> > > > > >
> > > > > > I thought I was building it with the sconce I had downloaded  
> > > > > > for other site, but now I see, that changes I make to the  
> > > > > > pci_daatabase.c are having no effect, that?s why I?m ending up  
> > > > > > with a black screen, no boot, in Open Bios, whenever I try to  
> > > > > > add a device that isn?t in the pic_databsae.c.
> > > > >
> > > > > No, you'll need to install a ppc cross-compiler (unless you're  
> > > > > native
> > > > > PPC) and use that to build the new binary.
> > > > >
> > > > > There are plenty of tutorials on the web as to how to build a
> > > > > cross-compiler so I'd suggest getting that set up first; then once
> > > > > that's done take a look at the OpenBIOS wiki at
> > > > > https://www.openfirmware.info/OpenBIOS for build instructions.
> > > > >
> > > > > There is also a separate OpenBIOS mailing list which is more on- 
> > > > > topic
> > > > > for OpenBIOS-related discussion so I'd suggest moving the  
> > > > > discussions on
> > > > > setting up the build environment over there.
> > > >
> > > > Thanks Mark, I was a little confuse what Cross-complier I needed.
> > >
> > > I was wondering how you plan on implementing the Voodoo2 video  
> > > card. Reverse engineer a driver? Port already existing voodoo2  
> > > emulation code to QEMU? Use documentation on Voodoo2 register  
> > > layout?
> >
> > I planned on porting the code from Bochs, but it seems heavily  
> > dependent on a bunch of Bochs specific bx_ calls, bot really  
> > modular. I may try the code from Dosbox, and see if it?s more  
> > modular. Baring that I?ll have to write it all from scratch.
>
> Does anyone know where the default Display NDRV comes from in Qemu- 
> PPC?

I think it comes from the pc-bios folder. That is found in the root  
level of your QEMU folder.

> I keep getting an NDRV that is for Non-existant hardware:
>
> 32119270913_c9e5313cf5_b.jpg <http://farm3.staticflickr.com/ 
> 2340/32119270913_c9e5313cf5_b.jpg>
>
> 32119268253_4b888357c6_b.jpg <http://farm4.staticflickr.com/ 
> 3945/32119268253_4b888357c6_b.jpg>
>
> If I use a version of Qemu, that has been modified to Upload the  
> Qemu,VGA NDRV, I can change screen resolutions, and bit depth in OS  
> 9/X, but if I hand Qemu the FCode rom to match the Video device I  
> am emulating, it doesn?t read the NDRV from the FCode rom, I get  
> this default Non-exsistan hardware NDRV.

I think the NDRV doesn't match the Voodoo2 video card. The driver you  
are probably using is made to only work with QEMU's VGA card. I don't  
know very much about the Voodoo2 video card, but if it can be used in  
a VGA mode, then it might be possible to use that NDRV.

> Is this coming from Qemu, I.E. is it a file I can change when I  
> build Qemu/Openbios, or is it the Mac OS that is loading this NDRV?

It is the Mac OS that reads and loads this file. But I think its  
possible to use that NDRV in OpenBIOS as well. Just never tried it  
before.

> I tried using the FCode rom, and uploading that when I build Qemu,  
> and it does upload the proper rom to 0x30, and I can dump it with  
> Macsbugs, so I know it?s the correct file, but even when I boot OS  
> X with the boot-args=romndrv=1, it doesn?t load the NDRV from the  
> FCode rom.

For some reason your single quotes appear as question marks. Look at  
"doesn't":
> when I boot OS X with the boot-args=romndrv=1, it doesn?t load the  
> NDRV