Found these inside a non-working 71B

[MikeSD]

rprosperi ' Wrote:  But this does not account for all of the missing RAM, it still seems like almost 1000 bytes is "missing". Perhaps there is some overhead required for the extra 64K System RAM.

Not directly related, but lets see how the 64K was allocated. Can you try FREE :PORT(0.04) and if it succeeds, then try MEM(0.04)? It should be just under 32KB. You can return the IRAM to SysRAM by CLAIM :PORT(0.04). The same process should also work for :PORT(0.05).

I will try those later but I have other 1BBBB and none of them show 17.5 with MEM. 16955 and 16943, depending on how cleared. I actually wouldn't expect MEM to report sys RAM as its used by OS not user