Is there a way to "fix" an older g-rex1200 to have 2 DMA slots?

keropi · 24 May 2006, 07:50

are there any instructions to "fix" an older g-rex1200 to have 2 DMA slots?

AFAIK it is just a matter of some forgotten lines...

DJBase · 24 May 2006, 08:59

You have to solder 2 wires on busboard and logicboard. Check the pictures on http://www.amiga-hardware.com/showha...gi?HARDID=1365

alexh · 24 May 2006, 09:02

There isnt enough information on the photo's

keropi · 24 May 2006, 09:24

yeah, the pics show nothing of value, just the wires in their general position...
DJBASE, can u provide us with some high-res pics???

DoctorQ · 24 May 2006, 09:39

Come on, you can clearly see where the wires go to and from. Have you tried clicking the links for higher resolution pictures?

alexh · 24 May 2006, 10:50

@doctorq

We looking at the same photo's? You dont see the whole other side of the PCI board! Who knows what goes on on that side you just see the two wires being soldered to points on one side and then dissapearing through a via to the other side.

Looking at the other photographs, I dont think that anyone can work out from the pictures which wire is which wire (both are the same colour) after they pass through the via of the Accelerator Adapter board to the other side?

You can work out which pins they are on the accelerator adapter board, but you dont know the wiring.

With the PCI board, you just dont know.

DoctorQ · 24 May 2006, 10:53

@alexh

Ehh, you have both sides of the adaptor card, and you can see how the wires are twisted, so it is easy to follow them on the other side as well.

-EDIT-

If you are talking about the busboard itself, then correct, it needs a second picture to be useable.

-END EDIT-

@keropi

If you can't make anything out of the pictures, then try contacting Amiga Center in France, he might have the information you need.

alexh · 24 May 2006, 11:03

Quote:

Originally Posted by DoctorQ

Ehh, you have both sides of the adaptor card, and you can see how the wires are twisted, so it is easy to follow them on the other side as well.

If you can work out which is which especially when they pass through the blob of glue on the "front side", you have better eyes than me

DoctorQ · 24 May 2006, 11:20

Well, I can, maybe it's my super contact lenses

keropi · 24 May 2006, 16:53

we need someone that owns one to take some high-res pix and mark the cables....

keropi · 24 May 2006, 16:58

Quote:

BBOAH
In the latest version all slots support 32bit DMA and are capable of transferring at up to 25MB/sec with 1.76GB of non bank-switching address space. Earlier models may only support DMA in the top 1 or 2 slots.

are there any g-rexes that have DMA in ALL slots????

DJBase · 24 May 2006, 17:21

Quote:

Originally Posted by keropi

are there any g-rexes that have DMA in ALL slots????

Only GREX4000-series have DMA in all Slots.

P.S. Trust only the G-REX homepage.

keropi · 24 May 2006, 18:03

24 May 2006, 07:50	#1
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	Is there a way to "fix" an older g-rex1200 to have 2 DMA slots? are there any instructions to "fix" an older g-rex1200 to have 2 DMA slots? AFAIK it is just a matter of some forgotten lines...

24 May 2006, 10:50	#6
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,356	@doctorq We looking at the same photo's? You dont see the whole other side of the PCI board! Who knows what goes on on that side you just see the two wires being soldered to points on one side and then dissapearing through a via to the other side. Looking at the other photographs, I dont think that anyone can work out from the pictures which wire is which wire (both are the same colour) after they pass through the via of the Accelerator Adapter board to the other side? You can work out which pins they are on the accelerator adapter board, but you dont know the wiring. With the PCI board, you just dont know. Last edited by alexh; 24 May 2006 at 10:59.

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24 May 2006, 08:59	#2
DJBase Amiga is my Religion Join Date: May 2005 Location: Germany Posts: 578	You have to solder 2 wires on busboard and logicboard. Check the pictures on http://www.amiga-hardware.com/showha...gi?HARDID=1365

24 May 2006, 09:02	#3
alexh Thalion Webshrine Join Date: Jan 2004 Location: Oxford Posts: 14,356	There isnt enough information on the photo's

24 May 2006, 09:24	#4
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	yeah, the pics show nothing of value, just the wires in their general position... DJBASE, can u provide us with some high-res pics???

24 May 2006, 09:39	#5
DoctorQ What?? Who?? DoctorQ!! Join Date: Jun 2005 Location: Rødding/Denmark Age: 43 Posts: 314	Come on, you can clearly see where the wires go to and from. Have you tried clicking the links for higher resolution pictures?

24 May 2006, 10:53	#7
DoctorQ What?? Who?? DoctorQ!! Join Date: Jun 2005 Location: Rødding/Denmark Age: 43 Posts: 314	@alexh Ehh, you have both sides of the adaptor card, and you can see how the wires are twisted, so it is easy to follow them on the other side as well. -EDIT- If you are talking about the busboard itself, then correct, it needs a second picture to be useable. -END EDIT- @keropi If you can't make anything out of the pictures, then try contacting Amiga Center in France, he might have the information you need.

24 May 2006, 11:20	#9
DoctorQ What?? Who?? DoctorQ!! Join Date: Jun 2005 Location: Rødding/Denmark Age: 43 Posts: 314	Well, I can, maybe it's my super contact lenses

24 May 2006, 16:53	#10
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	we need someone that owns one to take some high-res pix and mark the cables....

24 May 2006, 18:03	#13
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040

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