Rogelio Serrano wrote:
Whats the bare minimum hardware needed to display a framebuffer? dma
hardware to get a screenful or a line of display from memory and then
a dvi transmitter?
To display on a VGA type monitor, you need a Video Controller and a RAMDAC.
A Video Controller is a sync generator (mostly several counters) and a
DMA controller. They often also contain or control a buffer for one
(FIFO) or two (exchange buffering) lines.
A RAMDAC converts from the output of the Video Controller into analog to
drive the monitor. This consists of an input latch, the palate RAM
(which isn't totally necessary) and three video DACs.
You also need a digital driver for the V & H sync.
If you are doing digital output, whatever transmitter you are using
would replace the RAMDAC.
--
JRT
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