Determine which DIMM slot/chip select (0 or 1) corresponds to the failure address

[Nano]

Hi,

Please explain how to use the new configuration file parameters ADDR2SLBITS and ADDR2CSBITS to specify the bit positions of a memory address to exclusive-or (XOR) to determine which DIMM slot/chip select (0 or 1) corresponds to the failure address in Memtest V6.3..

Thanks..

[keith]

ADDR2SLBITS and ADDR2CSBITS configuration parameters may be useful if you know that the memory address bits decode into slot/chip select respectively using an XOR operation (in most cases, it is much more complicated). You specify a list of bit positions that will be XOR'ed in order to determine the slot/chip select (0 or 1).

For example, specifying the following in the config file:

ADDR2SLBITS=3,4

will XOR bits 3,4 of the address to determine the slot. So if the failed memory address is 0x139083B5:

Bit 3 is 0
Bit 4 is 1
0 XOR 1 = 1

Slot number of the failed DIMM is 1.

The exact same procedure is used for ADDR2CSBITS except the result represents the Chip Select (CS) of the failed DIMM.