I think you missed the topic.
This is more about 256M boards reporting 233M. This is not new to the hAP as2, it happens quite a bit, even more on the CCR's.
I don't know about other threads, but in THIS thread, the two people who posted before you said:
First one, after quoting the changelog entry mentioning correct detection of RAM size: "Mine shows 233Mb RAM, is that correct in both Winbox and CLI?
the specs on Mikrotik Website says it should be 128Mb" -- translation: I'm running a ROS version that has the posted correction, but when I compare the RAM size to what the spec sheet shows, I have
WAY more RAM than I think I should. Did the bug actually get fixed, or what?
Second one highlighted the 233MB in the copy-'n-paste, but said before that: "The same here, but no complain
" -- translation: hey, my router
also shows >128, but I'm not going to look a gift horse in the mouth...
Clearly they were talking about the difference between the published spec sheet and what their devices are actully reporting, all in the context of a ROS changelog entry;
not about 23MB missing if they assumed first that they
should have 256MB, which they didn't assume.
The changelog entry had nothing to do with the 23MB differential, and everything to do with devices that have a 256MB chip reporting ~128 instead.
It would seem that
ALL hAP ac2 devices show a small chunk of "missing" RAM, regardless of RouterOS or RouterBOOT version, even if the device "thinks" it should have 128; as seen here --
link to post -- a device running the buggy version of the software that mis-detected 128MB only showed a "total" of 106MB. If I had to guess, there is something about the hardware architecture that demands this.
-- Nathan