Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Jose on April 09, 2006, 05:25:42 PM

Title: Rev D. A4000D motherboard, how better is it ?
Post by: Jose on April 09, 2006, 05:25:42 PM

Hi. Was the "cost reduced version" (CR) any better ?
I mean, even being aimed at reducing production costs maybe there were some other things that were improved (or worse)?

 I know the battery backed up clock is better cause it uses coin shape batteries that normally don't leak.
Anything else ? The chips are the same so any bugs most still be there not ?
....
BTW amiga.resource.cx has also listed a rev. D motherbord besides the rev. D cost reduced one, was this a different version or it's a mistake ?

Title: Re: Rev D. A4000D motherboard, how better is it ?
Post by: Amigaz on April 09, 2006, 05:31:21 PM

well..and it doesn't have a simm socket for the chipram.
Chipram is surface mounted on the mobo
The kickstart rom chips are also located on a different place on the mobo compared to the other A4000 models
My towered A4000 is the CR model.

Title: Re: Rev D. A4000D motherboard, how better is it ?
Post by: Flashlab on April 09, 2006, 05:32:23 PM

And it has an 030 soldered on the board is recall correctly.

Title: Re: Rev D. A4000D motherboard, how better is it ?
Post by: Jose on April 09, 2006, 05:40:52 PM

I meant the differences in the design quality.
BTW it also has a socket for an FPU.

However according to amiga.resource.cx there was also an 040 version of this board, without the soldered 030 or FPU socket wich also MISSED the 50mhz oscillator or socket for it needed when replacing the A3640 for an asynchronous processor board.
Most Cyberstorms were ashynchronous right ?

Title: Re: Rev D. A4000D motherboard, how better is it ?
Post by: Matt_H on April 09, 2006, 06:40:37 PM

@ Jose

Not sure about that synchronous stuff, but if there is a problem, the fellow in France who does Amiga repairs could probably install the sockets and oscilators for you. (Expensive, I know, but arguably better than an unaccelerated board)

Title: Re: Rev D. A4000D motherboard, how better is it ?
Post by: Jose on April 09, 2006, 08:29:31 PM

@Matt
Jean Jacques ? Yeah, I've used his services and he does an excellent job, expensive though. Depending on the case, it might be better just to buy another motherboard off eBay.

Title: Re: Rev D. A4000D motherboard, how better is it ?
Post by: Jose on April 09, 2006, 08:49:41 PM

An 040 version just sold on german eBay for 160€ :lol:
Who was the crazy bidder ?
I promised myself I wouldn't bid.