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Re: [Qemu-devel] Re: RFC for new features
From: |
Derek Fawcus |
Subject: |
Re: [Qemu-devel] Re: RFC for new features |
Date: |
Sat, 10 Jul 2004 01:38:45 +0100 |
On Fri, Jul 09, 2004 at 11:13:30PM +0100, Antony T Curtis wrote:
> > 2) There are device emulation issues :
> > The current cirrusvga is a vast improvement over the previous bochs
> > device. However, pushing available memory to more than 4 Mb wold allow for
> > better resolutions : 1024x768x16 is a bit limiting in some uses.
Huh - I don't think there are any specific pitch restrictions on this chipset.
4M should allow address@hidden (or address@hidden). Is that not enougth?
> Well - the CL-GD544X chips can only handle 4MB of memory, maximum. For
> larger framebuffers, we would have to emulate a different video chip -
> If we wish to stick to Cirrus Logic, The Laguna CL-GD546x chips can
> address up to 16MB I think....
Nope. Only 8M. The architecture has scope for 2 RAMBUS channels, but they
only implemented chips with 1 RAMBUS channel. One of the fields in the
channel control register is 3 bits, identifying the number of 1M ram banks
available... (Someone who has spent too long playing with Laguna chips).
Besides, the Laguna is a more complex beast with a 3 operand BitBLT engine...
DF
- [Qemu-devel] (Before) RFC for new features, (continued)
[Qemu-devel] Re: RFC for new features, Emmanuel Charpentier, 2004/07/09
- Re: [Qemu-devel] Re: RFC for new features, Antony T Curtis, 2004/07/09
- Re: [Qemu-devel] Re: RFC for new features,
Derek Fawcus <=
- [Qemu-devel] 3Dfx... Just guessing, Natalia Portillo, 2004/07/09
- Re: [Qemu-devel] 3Dfx... Just guessing, Fabrice Bellard, 2004/07/10
- RE: [Qemu-devel] 3Dfx... Just guessing, Natalia Portillo, 2004/07/11
- RE: [Qemu-devel] 3Dfx... Just guessing, Ishwar Rattan, 2004/07/11
- RE: [Qemu-devel] 3Dfx... Just guessing, Natalia Portillo, 2004/07/11
Re: [Qemu-devel] 3Dfx... Just guessing, Jim C. Brown, 2004/07/10
Re: [Qemu-devel] 3Dfx... Just guessing, Gianni Tedesco, 2004/07/11
Re[2]: [Qemu-devel] Re: RFC for new features, Igor Shmukler, 2004/07/11
Re: [Qemu-devel] RFC for new features, Thomas Munn, 2004/07/08