Dieter wrote:
Am I correct in thinking that a SATA controller would be easier and faster to
design than a graphics/video controller, and that it would cost significantly
less to get an ASIC fabbed?
Is it anything more than a parallel to serial and serial to parallel
converter. a DMA controller, and the line transceiver?
The SATA controller is involved in NCQ.
The DMA controller needs to be able to handle this. So, you have to
program the DMA controller when you make an access request and the DMA
controller has to respond to tags it receives from the disk.
I suspect it is involved in error detection/correction?
I think that that would still be handled by the disk's controller.
It might be involved in handling port multipliers?
Intel claims their chip [31244] allows simultaneous port access to the 4
ports and has published a Linux driver to do this.
So, exactly what is the problem? Apparently, there is no standard for
programing the DMA controller or for simultaneous port access. :-(
OTHO, Intel has published standards for NCQ communication with the disk. :-)
--
JRT
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