DMAC Chip Revisions (A3000 experts will come into their own here)

[Fixer]

Hello,

I was thinking of building an A3000 with one of those A3640 CPU cards as a way of cheaply accelerating the Amiga 3000.

To do this I thought it best upgrading the Ramsey and DMAC chips to 07 and 04 respectively.

Ramsey isn't too much of a bother because I'm sure I'll find one of these somewhere, but I know how rare the later DMACs are and that's why I picked one up on eBay some time ago thinking it is a later revision.

However, now looking at this chip I'm not too sure. Looking on Amiga hardware there seems to be only these listed:

Chip Name ---------- Part Number -- Used In
DMAC ----------------- 390563-01 ----- A590, A2091
DMAC ----------------- 390563-02 ----- A3000
DMAC ----------------- 390563-04 ----- A3000T, A4000T
Super DMAC 81 --- 390537-02 ----- A3000

Mine, however, is none of those listed. Here is what is labeled on my DMAC chip:

C= CSG
390537-04
65-SUPER DMAC
CBM 1989, 90, 91
5192 50009D

As you can see it seems to be a Super DMAC rather than an upgraded DMAC chip.

So at this point I'm rather confused. Does anyone know what this revision is/is for and if I can use it for the upgrade?

Thanks.

[Fixer]

downix wrote:
It should work.  It's a rare beasty, only found 3 references for it anywhere, all of which seem to refer to the A3000+ or last-gen A3000's (stupid babelfish translation), and is listed as one of the fastest DMAC made.

Thanks dude, and that's good to know about it being rare.. well unless it requires an equally rare Ramsey to go along with it. Lol.

@wildstar1063

Yeh that's my chip in your top picture. It's exactly the same!

I haven't actually got a A3000D yet but I've got a lot of the parts ready like Super Buster 11, that DMAC chip and Zorro cards.

Accelerators cost a bomb so I thought the A3640/Amiga 3000 combination is almost as good as an all-in-one accelerator solution. :-)