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RE: streaming PCI / STOP after 4/8 words
> When I do as master read transfers to the memory with pci
> 32-66Mhz on a tyan
> thunder HEsl S2567 under NT4.0
> I get a STOP signal after 8 words with the read multiple
> command, and after
> 4 words with the memory read command.
I bet it's a chipset PCI-to-host bridge problem. Perhaps the buffer for Main
memory to PCI reading is only 8 words long.
I have been seeing something similiar when, with the CPU I read PCI memory.
The largest read is of 2x32bit words (using MMX instructions and registers).
Even with SSE 128bit registers/instructions, you get two "64bit"
> How can I avoid that the motherboard send a stop after 4 or 8
> words so that
> my burst lenght is greather ?
Well, in my case I have now been told no thing can be done. In yours it's
strange since the reading from PCI masters should be optimized.
Hope it helps,