Miernik wrote:
Bari Ari bari@onelabs.com wrote:
The VT8237 supports LPC flash. The LPC clock is the same speed as the PCI clock, 33MHz.
For more info take a look at the LPC spec: http://www.intel.com/design/chipsets/industry/lpc.htm
33 MHz, 4 bit wide, that gives 16 MB/s theoretical maximum. Not really impressive compared to 1066 MB/s N-S link. 64 times slower. And 192 times slower than DDR400 RAM. Am I right? XiP would be terribly slow :(
Yes, slow.
I think you misunderstood me. I didn't intend to put SRAM in the DRAM sockets, but in the BIOS chip NOR flash socket. Isn't NOR flash read the same way as SRAM (write is different of course, but I don't care about writes here)?
Would that work?
Even if you had SRAM with matching packages and pinouts to replace the Flash, the read access times would be the same.
The chipset sets the speed of LPC, ISA or FWH interface.
-Bari