Dear Sirs

Is LoLo´s test-mem reliable enough to assure that the DDR ram is 100% operational?

I did a script where I runned 100 loops of test-mem over DDR ram without a single error:
test = 100
while( $test )
test-mem
test = $test-1
done

After that, I tryed to decompress a Linux image into the DDR RAM, but a CRC error showed up.

This Linux image was downloaded through Ethernet and RS232 using LoLo. Both downloaded without any error.

In time, I have 2 Litekits. The first ( where the CRC error occurs ) I did a LoLo recover using a Macraigor´s USB2Sprite JTAG interface and Flash Programmer. The second is a fresh one, untouched.

The second unit (new one ) accepts the Linux image decompressing without error and the Linux boots normally.

If I have a defective unit in the DDR RAM ( first one ), why the TEST-MEM does normally in it?

Or, something else must be done in the LoLo´s environment? I mean, some YAFFS adjustments? If so, where I must adjust?

Thanks a lot for any help

Sergio Kamakura
Warp Tecnologia