On 8/31/06, Jack Carroll <[EMAIL PROTECTED]> wrote:
One question: can it get its power from the OGC1, if the display
doesn't send any power up the cable?
I'm pretty sure that DDC supplies power from the graphics card.
(All of this assumes that OGC1 and its BIOS actually implement EDID.
Last remarks I saw implied you were leaning that way, but it wasn't final.)
I think EDID should be supported without question.
Regarding the SPI tools, I wonder where your thinking has evolved to
since we last threw ideas around?
Does it simplify the ASIC and the board if all devices on the SPI
port are required to emulate the serial EEPROM?
You may have no choice but to include an SPI PROM on the external
board, because of clock speeds.
If the EEPROM is big enough, can it supply everything the ASIC needs
to configure itself at power-up?
They're really cheap. Put a big one on there.
Can an external EEPROM supply a pre-configured video mode program
along with everything else it stores? (If so, then an intelligent SPI tool
could compute a mode program and impersonate an EEPROM. That shouldn't
require any features to be added to the ASIC, beyond providing a chip select
for an external EEPROM tool.)
This sounds like a good solution.
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