|
One minor detail that most people are missing.
You also need a CPU (or graphics chip) that can support 18 bit displays. The XPA25x and 26x parts only supported 16 bits without things getting messy. I'd have to double check if the 27x devices supported them, even then a QVGA screen in 18 bit colour would fit into the internal screen buffer of the 27x parts but you would have to pack the bits giving a hit on graphics speed. If you used 32 bits for each pixel it would run faster but then your screen buffer is to big to fit into the CPUs internal SRAM, putting your screen buffer in system memory slows the whole system down and uses more power.
The display may well be able to support 18 bits but not only is it nastier for the software it just isn't practical on the hardware. You can do it but it would be a case of marketing over logic to do so.
|