8375 are newer versions of what? What Amigas work with them?

[alexh]

These are a 1-Meg varient of the SuperFAT (2-Meg) Agnus which was made for the A500+/A600 and has a packaging / bondout to make them compatible with ECS machines.

They are directly usable in 1-Meg Amiga's. A500/A2000/CDTV computers.

To make them usable in earlier 512k Amiga's you have to do some work, add a capacitor, cut a track, change a jumper.

http://www.l8r.net/technical/t-agnus-installation.shtml

@James

You've got the date wrong for this chip. They are some of the last chips made ever by commodore. The earliest date code I've seen for a -17 chip is Week 25, 1992.

-17 is NTSC

[alexh]

eslapion wrote:
they have the same PLCC package as all other fat Agnus I have ever seen; 8370, 8371, and both 8372A and B.

Unfortunately most Agnus chips have exactly the same PLCC packaging but they have a widely different electrical pinout.

[alexh]

VBB is a process code. Not sure exactly what it means but it is something to do with the factory / packaging / ESD.

It has nothing to do with functionality what so ever!

Lots of oher Amiga chips (Denise, Paula, Budgie etc.) made at the same time also have VBB on them.

I've got 2-Mbyte Agnus chips without VBB printed on them and I have 1-Mbyte ones with VBB printed on.

[alexh]

satiropan wrote:
I bought a 8375 390544-01 is it pin compatible with the 8372B or 8375B Agnus part number 318069-03?

I am not sure. It's a case of suck it and see. If your A2000 catches fire, dont blame me ;-)

And... where can I find a trustful pinout description for all these chips?

Nowhere. I've not been able to find any real information despite many pleas here and usenet.

[alexh]

amesie2 wrote:
The 8375 is used in the DKB Megachip to give 2MB of ram according to BBOH.

The Agnus page of BBoH is a little screwed up. It is not a 100% accurate source of information.

But yes you can find the 8372B 318069-03 and 8375 390544-01 on the DKB MegaChip. However it is not known if they changed the PCB to use one or the other.

[alexh]

Ilwrath wrote:

Alexh wrote:
Unfortunately most Agnus chips have exactly the same PLCC packaging but they have a widely different electrical pinout.

Really??  Which ones are these, so we can look out for them?

I got my information from Dean Brown (DKB)

http://groups.google.com/group/comp.sys.amiga.hardware/browse_thread/thread/5773722a3a19200e/eef6251d17b5d6d5?lnk=st&q=dean+brown+megachip+versions&rnum=1&hl=en#eef6251d17b5d6d5

Dean Brown wrote:
There are actually 19 or so different versions of the 8375 Agnus, each of which has a different pinout.

[alexh]

57goldtop wrote:
No it's isn't, don't even try it.

Do you have any proof this is true? I'd like to know for sure if it is true.

[alexh]

Very very interesting, I must try to talk to this Yokes Heinrich guy.

Shame he refers to the BBoAH Agnus page (which is wrong).

BTW: If you put that URL into google and click translate it's not too bad.