How much memory is supposed to be on a black box system? Minus the old motherboard style. When the system comes up it is counting up to 256 Mb. I remember possibly counting to a higher number during the boot sequence?
If you are seeing 256, you must be looking at the video ram numbers on boot-up. The MFDBB wouldn't even boot up with 256MB. I believe the normal SDRAM is 1GB, if I recall correctly.