Amiga ACA500 is awesome!

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You could open a ticket on icomp.de and see if they could provide a reason/fix. I didn't know you could do that until recently on a mailing list for Turbo Chameleon 64.

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Yeah, I think they want you to hit up your re-seller first of course.

I guess one benefit of posting on that other board (EAB) is that Jens actually posts there

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And we have learned now that "add other on-board RAM" is the 512k that is reserved for MapROM. If you have MapROM off, it doesn't give you this extra RAM without also turning on "Add other on-board RAM". So in essence, there is 2 M available, however, only 1.5 is available by default without changing other settings too.

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I should have paid more attention to what you said here. After configuring the appropriate expert menu settings, saving and then hitting "boot", I see all of my RAM!

I also boot into profile #1 from the main menu and get the same results. Any other option referring to KS 1.3 on the main menu will make me lose the additional 512k and this is why I kept going nowhere. I never used the profile boot method. The "complete configuration using KS 1.3" appears to add IDE support (which I know sucks up another 300k) but the other menu option referring to "kickstart 1.3 and FAST RAM" does not behave as one would expect.

 Oh awesome, so you are good now? I was doing something similar, until reading your post. That made me question what I was doing and looked into it further.

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I wish there was a way to not map 512k for ROMs and just use the onboard ROM allowing the use of the 2MB RAM.  I think it's silly to have developed it this way.  2MB ram but not able to ever use 2MB, only 1.5MB!  Why didn't he add 1MB for the MapROMs or something so we can have the full 2MB?

Well, you "can" use all the RAM if you have a real 1.3 or 3.1 ROM in your Amiga. Unless I'm not understanding your question properly. I only boot into 3.1 if I'm writing an ADF to a floppy, otherwise, I use 1.3 which is what I have installed on my PCB.  I'll admit, I'm a new Amiga user, so I'm still learning.

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Yes, I appear to be good now. I never thought to try other boot options because the main menu options at the top were more obvious.

That's great! I don't think the operation of this device is all that intuitive.