What exactly does the Amiga 4000 64Mb support hack look like?!

[Unit21]

Hi everyone...

I have an Amiga mainboard for sale on eBay. I got it from Germany the other day.
When I made the picture of it yesterday I saw that some modification had been made to it close to the Ramsey Chip.

I am now wondering if any of you can tell me if this is the infamous Memory Hack...??

The card can be spotted at:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2794808033&indexURL=0&photoDisplayType=2#ebayphotohosting

If you want better quality pics just let me know and I can email you some....

[voxel]

Excuse this dumb question, but what memory hack :-?

BTW, I've seen nothing on your picture... too bad quality
as it seems your camera doesn't made the point before taking it ;-)

[Unit21]

Hi.

The Amiga 4000 motherboard can be ´hacked´ to handle 64Mb memory.
As I recall you have to do some extra wiring from the Ramsey chip
(The memory controller) to some of the PALs.... or something like this.

I was just wondering if someone knows what this hack looks like...
... I might have a nifty motherboard here... ;-)

[x56h34]

I've never heard of this before. It would be nice if it were possible. ;-)

[Xand]

@voxel

If you compare the picture to the one of the 4000 MB pictures on amiga-hardware.com, you can see that his has a couple of wires running from the Ramsey to another chip.

Maybe it is...

[Doobrey]

Unit21 wrote:

As I recall you have to do some extra wiring from the Ramsey chip (The memory controller) to some of the PALs.... or something like this.

 AFAIK, it was a reworking of the logic inside the PAL that let it handle 64MB, so I doubt you could tell from the looking at it.

Maybe it`s some repair work to fix a duff trace or two?

[voxel]

Well, where can I find that hack?