Am 21.04.2010 17:19, schrieb Invisible:
>>> And anyway, I thought the original VGA board had 2D acceleration?
>>
>> Nope. Back then, even 2D hardware acceleration was still the sole
>> domain of specialized display adapters, such as IBM's 8514/A (which
>> later "fused" with VGA into XGA though if I'm not mistaken).
>
> http://en.wikipedia.org/wiki/Vga
>
> Claims that the original VGA card has "some support for raster ops". Of
> course, being Wikipedia, it doesn't elaborate further...

IIRC from my old days of programming graphics output, there were 
mechanisms in place to do fancy things that would allow you to do a 
single write where you'd normally need a read/modify/write combo - such 
as masking the pixels to affect with the write (as each byte would 
control multiple pixels), and maybe stuff like automatical XORing (so 
you could write a sprite on a background and later "un-write" it), but 
that's about as good as it got. Kind of 1D acceleration, so to speak.

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