need advice: Amiga 3000D and Agnus

[Bokasa]

I need advice. May I temporary use it Agnus 8372A instead 8372B at my A3000D? With 1M chip RAM?
Thanks.

[Jiffy]

As far as I know the A & B versions are not pin compatible.

[Bokasa]

as far as i know the a & b versions are not pin compatible.

8375?

[magnetic]

afaik you cant use a2000 agnus in 3000

[psxphill]

afaik you cant use a2000 agnus in 3000

The agnus are basically all compatible. The main difference is the pin configuration, but that can be fixed using an adapter.
 
If you want one that will drop in then get one that is marked exactly the same (the year and week can be different but nothing else).
 
The 8372/8372A/8372B doesn't specify the pin configuration, there is another number that is used for that.

[Oldsmobile_Mike]

IMHO I wouldn't try it without a proper adapter.  Not worth the risk.

For starters there's a pin chart on Wikipedia, but even there it states that pinouts/usage are not consistent:

http://en.wikipedia.org/wiki/MOS_Technology_Agnus

[Zac67]

There are three different Agnus models (PLCC): the A500/2000 one, the A3000(T) one and the A500+/600 one (neglecting the PAL vs NTSC vs switchable detail). None or pin compatible.

alexh once collected details on them; possibly this is the most reliable source there is.

[magnetic]

For a change I agree with oldsmobile. DO NOT risk a rare a3000 with hacking the agnus. Just get the proper chip.

[SACC-guy]

Maybe the question really is...
How does the OP get 2 megs of chip memory in his 3000?

Didn't the 3000 agnus just need the dip memory moved from the fast side of the motherboard to the chip side of the board?

[Zac67]

Didn't the 3000 agnus just need the dip memory moved from the fast side of the motherboard to the chip side of the board?

Yes, exactly. The 1 MB Agnus version (500/2000) won't work at all.

[Bokasa]

Thank you.