[ale] No RAM = No BIOS?

[mike at trausch.us]

On 08/16/2012 09:29 AM, James Sumners wrote:
> But if you have no system RAM for that to happen, what is the video
> card going to use for storing display data?

It's own memory.  (And you can find on-boards that have dedicated memory
and simply "grow" using shared memory, but they're more expensive).

The thing is that graphics cards use MMIO (memory-mapped I/O) to
communicate with the system.  They also provide I/O ports for control,
but the display itself is addressed through the processor's address bus.

	--- Mike

-- 
A man who reasons deliberately, manages it better after studying Logic
than he could before, if he is sincere about it and has common sense.
                                   --- Carveth Read, “Logic”

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