Re: [oc] Video controller core

["vdesign" <vdesign@satyam.net.in>]

Hi Richard,
  please send me updated datasheet/specs.document.
Thank you in advance
Mouttou
----- Original Message -----
From: "Richard Herveille" <richard@asics.ws>
To: <cores@opencores.org>
Sent: Monday, March 04, 2002 4:51 PM
Subject: Re: [oc] Video controller core


>
> Hi all,
>
> I just stumbled on this old thread. Seems like OpenCores has the
> ingredients for it.
> Combining the PCI bridge with the vga_lcd controller and the
> i2c_master_core (for DDC) should provide the functionality described
> (except for the 3D acceleration). Although the hardware cursors do support
> 3D effects. I am finalizing the hardware cursor designs now. If somebody
is
> interested I can send an updated datasheet/specs.document.
>
> Richard
>
>
> > >
> > > Just read some of the messages about building a video controller
> > > core.
> > >
> > > I have done some work on the other side of the aisle... writing
> > > Linux
> > > kernel video device drivers.
> > >
> > > Here are some ideas about video cores:
> > >
> > > For ultra-low-cost embedded, CGA is the best choice.
> > >
> > > If compatibility is a concern at all, though, it is much smarter to
> > > develop a VGA core.  VGA is pretty much universally supported.
> > >
> > > But if you want to develop a GOOD video core.......
> > >
> > > * Lives on a PCI or AGP bridge
> > >
> > > * All 32-bit registers, 100% memory-mapped I/O (MMIO)
> > >
> > > * Registers can optionally live in a DMA command buffer.  This is a
> > > ring
> > > buffer of register reads and writes, which the video chip processes
> > > asynchronously.
> > >
> > > * NO VGA compatibility.  NO text mode.  These can be emulated in
> > > BIOS or
> > > other software.
> > >
> > > * Integrated *DRAM controller, as the video chip must keep tight
> > > control
> > > over both video clocks and memory clocks
> > >
> > > * Standard set of 2D accels:  fills, blits (fb/DMA mem -> fb/DMA
> > > mem
> > > copy), etc.
> > >
> > > * VESA features like DDC, power management
> > >
> > > If someone is ambitious, this design can extended to support 3D ---
> > > without changing any of the chip features/logic above.  In most 3D
> > > chip
> > > designs, 3D is seamlessly layered on top of 2D, and is very cheap
> > > to add
> > > to the design.
> > >
> > >
> > >
> > > --
> > > Jeff Garzik              | "Are you the police?"
> > > Building 1024            |
> > > MandrakeSoft, Inc.       | "No ma'am.  We're musicians."
> > >
> >--
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>
>
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