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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Unit21 on March 16, 2004, 06:39:35 PM

Title: What exactly does the Amiga 4000 64Mb support hack look like?!
Post by: Unit21 on March 16, 2004, 06:39:35 PM

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....

Title: Re: What exactly does the Amiga 4000 64Mb support hack look like?!
Post by: voxel on March 16, 2004, 07:53:42 PM

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 ;-)

Title: Re: What exactly does the Amiga 4000 64Mb support hack look like?!
Post by: Unit21 on March 16, 2004, 08:55:42 PM

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... ;-)

Title: Re: What exactly does the Amiga 4000 64Mb support hack look like?!
Post by: x56h34 on March 16, 2004, 09:45:57 PM

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

Title: Re: What exactly does the Amiga 4000 64Mb support hack look like?!
Post by: Xand on March 16, 2004, 10:23:09 PM

@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...

Title: Re: What exactly does the Amiga 4000 64Mb support hack look like?!
Post by: Doobrey on March 17, 2004, 03:11:55 AM

Quote

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?

Title: Re: What exactly does the Amiga 4000 64Mb support hack look like?!
Post by: voxel on March 17, 2004, 08:09:12 AM

Well, where can I find that hack?