Amiga 500 - AdRAM 540

[blindguy]

Hello everyone, nice to meet you all.

I just received an Amiga 500 from eBay and had a few questions.
It appears to have a AdRAM 540 with all the chips filled in so I think it is 4MB but as they advertise only 2.5 MB RAM is autoconfigured, so I have to figure out the software to see all of it.
http://amiga.resource.cx/exp/adram5

The bigger question I have is about the subboard that sits ontop of the Gary and is sodered to the motherboard.

Looking at the Agnus chip it sez fat agnus on the board and 8372A  318069-02  5188 23 on the chip.


Also on the board it sez
 B52/Rock Lobster
GRR/JSP/GUAY/FISH
A500N
and I think it is a Rev 5 board but there is a sticker on it that I odn't want to remvove.

SO I think I have a Fatter Agnus due to the 8372A  on the chip.
The questions is think I can pull the current Agnes and put in t a Super-Fat Agnus chip without having to do more sodering?
Also, what is this PHOEBE Agnus chip board that the Gary sits on top of do?
Thanks for any assistance in advance!

[blindguy]

ok so I gtot he software going and here is what it sez:

          available  max

chip     969824   1047520
fast    3596592   3662552
total   4566416   4710072

that makes me thik I have a 1 meg ECS agnus
The question I have is can I swap it out with a 2 meg agnus?

Thanks for your thoughts and ideas

[blindguy]

Bummer, thanks for the prompt response.