Any dual AGP slot motherboards?
Hi! I looking for a motherboard that supports more than one AGP slot. Does anyone know any like this? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
the AGP bus specification is for a single device (master) you can review it at: http://www.intel.com/technology/agp/agp_index.htm joelja On Thu, 19 Oct 2000, James Simmons wrote: > > Hi! > > I looking for a motherboard that supports more than one AGP slot. Does > anyone know any like this? > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to [EMAIL PROTECTED] > Please read the FAQ at http://www.tux.org/lkml/ > -- -- Joel Jaeggli [EMAIL PROTECTED] Academic User Services [EMAIL PROTECTED] PGP Key Fingerprint: 1DE9 8FCA 51FB 4195 B42A 9C32 A30D 121E -- It is clear that the arm of criticism cannot replace the criticism of arms. Karl Marx -- Introduction to the critique of Hegel's Philosophy of the right, 1843. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
On Thu, 19 Oct 2000, Joel Jaeggli wrote: > the AGP bus specification is for a single device (master) > you can review it at: > http://www.intel.com/technology/agp/agp_index.htm There is no reason there cannot be multiple AGP buses. After all there are motherboards with 2,3,4 (or more!) PCI buses. -Dan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
> There is no reason there cannot be multiple AGP buses. After all there are > motherboards with 2,3,4 (or more!) PCI buses. Apple sells a computer with dual AGP slots. I just was looking for a intel box like this. Since AGP is a port on the PCI bus it is possible to have more than one AGP port on a/each PCI bus but this requires the PCI chipset to support this. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
** Reply to message from James Simmons <[EMAIL PROTECTED]> on Thu, 19 Oct 2000 18:34:51 -0700 (PDT) > Apple sells a computer with dual AGP slots. I've never heard this. Could you tell me exactly which model this is? -- Timur Tabi - [EMAIL PROTECTED] Interactive Silicon - http://www.interactivesi.com When replying to a mailing-list message, please direct the reply to the mailing list only. Don't send another copy to me. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
> >Apple sells a computer with dual AGP slots. I just was looking for a intel >box like this. Since AGP is a port on the PCI bus it is possible to have >more than one AGP port on a/each PCI bus but this requires the PCI chipset >to support this. Well, I don't know of such a Mac. To my knowledge, the only Apple box to have an AGP slot are the ones based on the "Core99" chipset, and they provide one AGP slot. You won't be lucky with Apple HW anyway as there are currently issues between the AGP controller and the Linux agpgart driver preventing from using it. Those issues are tricky and I don't think a solution will be available soon. (Apple chipset can make the AGP aperture visible to the CPU AFAIK). Ben. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
Followup to: <[EMAIL PROTECTED]> By author:Joel Jaeggli <[EMAIL PROTECTED]> In newsgroup: linux.dev.kernel > > the AGP bus specification is for a single device (master) > > you can review it at: > > http://www.intel.com/technology/agp/agp_index.htm > Technically, AGP is a "port", not a "bus", for this very reason. However, there is nothing that says a chipset can't provide more than one AGP port; it just means you can't connect more than one device to each port. -hpa -- <[EMAIL PROTECTED]> at work, <[EMAIL PROTECTED]> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
On Thu, 19 Oct 2000, Timur Tabi wrote: > ** Reply to message from James Simmons <[EMAIL PROTECTED]> on Thu, 19 Oct 2000 > 18:34:51 -0700 (PDT) > > Apple sells a computer with dual AGP slots. > I've never heard this. Could you tell me exactly which model this is? I think he's confusing dualhead cards with dual agp slots. I dont think *anyone* makes dual agp slots. -Dan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
> > ** Reply to message from James Simmons <[EMAIL PROTECTED]> on Thu, 19 Oct 2000 > > 18:34:51 -0700 (PDT) > > > Apple sells a computer with dual AGP slots. > > I've never heard this. Could you tell me exactly which model this is? > > I think he's confusing dualhead cards with dual agp slots. > > I dont think *anyone* makes dual agp slots. After much searching I couldn't find one. It was one of those mac rumors people spread around. I still like to get more than one AGP going. If I have multiple PCI bus in theory I should be able to have one AGP port on each PCI bus. Right? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
Yo James! On Fri, 20 Oct 2000, James Simmons wrote: > After much searching I couldn't find one. It was one of those mac rumors > people spread around. I still like to get more than one AGP going. If I > have multiple PCI bus in theory I should be able to have one AGP port on > each PCI bus. Right? AGP is much faster than PCI bus and has nothing to do with the PCI bus. So the number of multiple PCI buses has nothing to do with the number of AGP buses. The way to get multiple PCI buses is to bridge one PCI bus on to another. There are no changes required to the core chipset. There is no way (yet) to bridge one AGP bus on another. AGP is very tightly coupled with the main memory controller chip so it is unlikely that there will be any dual AGP motherboard until one of the big semi manufacturers puts that feature in a core chipset. RGDS GARY --- Gary E. Miller Rellim 20340 Empire Ave, Suite E-3, Bend, OR 97701 [EMAIL PROTECTED] Tel:+1(541)382-8588 Fax: +1(541)382-8676 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
Followup to: <[EMAIL PROTECTED]> By author:"Gary E. Miller" <[EMAIL PROTECTED]> In newsgroup: linux.dev.kernel > > Yo James! > > On Fri, 20 Oct 2000, James Simmons wrote: > > > After much searching I couldn't find one. It was one of those mac rumors > > people spread around. I still like to get more than one AGP going. If I > > have multiple PCI bus in theory I should be able to have one AGP port on > > each PCI bus. Right? > > AGP is much faster than PCI bus and has nothing to do with the > PCI bus. Well, it borrows a *lot* from the PCI bus in its design. > So the number of multiple PCI buses has nothing to > do with the number of AGP buses. > > The way to get multiple PCI buses is to bridge one PCI bus on > to another. There are no changes required to the core chipset. > There is no way (yet) to bridge one AGP bus on another. > This isn't necessarily true. It's quite common to have multiple PCI busses connected to the *HOST* bus. AGP isn't a bus, it's a port. You won't be able to bridge them, but it's perfectly feasible for the chipset to provide more than one AGP port. -- <[EMAIL PROTECTED]> at work, <[EMAIL PROTECTED]> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
On Fri, 20 Oct 2000 19:56:26 Gary E. Miller wrote: > Yo James! > > On Fri, 20 Oct 2000, James Simmons wrote: > > > After much searching I couldn't find one. It was one of those mac rumors > > people spread around. I still like to get more than one AGP going. If I > > have multiple PCI bus in theory I should be able to have one AGP port on > > each PCI bus. Right? > > AGP is much faster than PCI bus and has nothing to do with the > PCI bus. So the number of multiple PCI buses has nothing to > do with the number of AGP buses. > AFAIK, AGP is just a preferent PCI slot in the PCI bus; that is for you can only have ONE AGP port on a PCI bus. If all were AGP ports, you will have a new-reinvented-ultra-fast-pci-bus. It is fast because it is special, just for that. In linux, lspci -v lists also your AGP card, doesn't it ? Please, could an expert point to the AGP standard defs ? -- Juan Antonio Magallon Lacarta mailto:[EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
Yo All! On Fri, 20 Oct 2000, J . A . Magallon wrote: > AFAIK, AGP is just a preferent PCI slot in the PCI bus; that is for you can > only have ONE AGP port on a PCI bus. No. The AGP bus is never ON a PCI bus. To quote the AGP 2.0 spec section 1.2: "A.G.P. neither replaces nor diminishes the necessity of PCI in the system. This high speed port (A.G.P.) is physically, logically, and electrically independent of the PCI bus." "The A.G.P. interface specification uses the 66 MHz PCI (PCI Local Bus Specification) specification as an operational baseline, and provides four significant performance extensions or enhancements to the PCI specification which are intended to optimize the A.G.P. for high performance 3D graphics applications. These A.G.P. extensions are not described in, or required by, the PCI Local Bus Specification. These extensions are: · Deeply pipelined memory read and write operations, fully hiding memory access latency. · Demultiplexing of address and data on the bus, allowing almost 100% bus efficiency. · New AC timing in the 3.3 V electrical specification that provides for one or two data transfers per 66-MHz clock cycle, allowing for real data throughput in excess of 500 MB/s. · A new low voltage electrical specification that allows four data transfers per 66-MHz clock cycle, providing real data throughput of up to 1 GB/s." So they started with the PCI spec, but they changed the logical meaning of a lot of the bus signals, they added a lot of bus signals, they run it about 8 times faster, they changed the voltage and a bunch of other stuff. I say it is a different animal now. > Please, could an expert point to the AGP standard defs ? http://developer.intel.com/technology/agp/ The spec itself is at: ftp://download.intel.com/technology/agp/downloads/agp20.pdf In any case, I do not see how this topic belongs on the l-k list. Contact me off-list if you need more info. RGDS GARY --- Gary E. Miller Rellim 20340 Empire Ave, Suite E-3, Bend, OR 97701 [EMAIL PROTECTED] Tel:+1(541)382-8588 Fax: +1(541)382-8676 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
Re: Any dual AGP slot motherboards?
>So they started with the PCI spec, but they changed the logical meaning >of a lot of the bus signals, they added a lot of bus signals, they run it >about 8 times faster, they changed the voltage and a bunch of other stuff. >I say it is a different animal now. Sorry to post yet another correction, but you've misinterpreted the AGP spec a bit. To really understand what's going on, you must read farther into the spec. AGP adds "sideband" signals to 100% standard 66 MHz 3.3V PCI. The sideband signals are for setup, control, and clocking of AGP mode transactions. AGP transactions re-use the PCI data pins for data transfer, but at no time is the PCI logical or electrical protocol violated. During AGP transfers, the PCI state machines on both sides are simply told the bus is busy. At least as of AGP 2X, AGP was such a compatible superset of PCI that it was possible to connect an AGP 2X device to a PCI bus and have it work. You can't do that if you want to use AGP transfers, since they require a point-to-point bus, but if the AGP pins are left unconnected the device act as a normal PCI device. As a matter of fact, most if not all current PCI video cards have the same chips as the respective AGP versions. I personally own an ATI PCI video card which has "AGP 2X" silkscreened on top of its Rage Pro chip. This was likely a key element of Intel's plan for marketing AGP to the industry; AGP would have been a much harder sell if it had forced companies to develop different chips for the AGP and PCI versions of their cards. It does sound like they've finally changed signalling levels for AGP 4X. If PCI-mode transfers have to use the new electrical spec, it's the first time the PCI part of AGP has departed in any way from standard PCI. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
