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/  Forum Index
   /  Amiga OS4 Hardware
      /  SAM 440EP / M9 Chip
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PosterThread
Morphix 
SAM 440EP / M9 Chip
Posted on 6-Mar-2021 5:04:24
#1 ]
Regular Member
Joined: 10-Aug-2009
Posts: 449
From: Greece

Hello folks.

It seems that after so many years of stable and faithful working, my Sam 440EP broke.

The board is this: http://www.acube-systems.biz/index.php?page=hardware&pid=1

I get corrupted image on the screen. Checked with different monitors, cables and dvi to vga adapters, same result.

I wrote to Acube, sending some photos as well. They said that the problem could most likely be the VRAM of the on board M9 Radeon graphics chip. They also spotted the main RAM module but it seems that the M9 chip is the problem.

They also pointed that they do not have replacement chips any more so they probably would not be able to fix the board.

So my first question is:

Does anyone knows the exact details of the M9 chip that is used on Sam 440EP. I am thinking of trying to locate one online. Any recommended places to check?

Second question:

If I would use a PCI graphics card what is the recommended one? On some other topics / forums I read about the Radeon 9250. But there is this sticker on the PCI slot pointing that I should not use 5.5Volts or 5Volts PCI cards on there. So what is the correct voltage number I should go for? I believe 3.3 right? But how I would identify that the card that I would buy carries the correct voltage? Any link / example featuring the right card would be great.

Has anyone run through a similar problem?
How it was solved?

Ps. On another topic I have read that the Acube guys, tried to reflow the chip on nother board with the same prob. That was prior to the chip replacement they did. Reflowing the chip did not fix the problem.

I will wait for your replies.

Thanks


Last edited by Morphix on 06-Mar-2021 at 05:24 AM.
Last edited by Morphix on 06-Mar-2021 at 05:22 AM.
Last edited by Morphix on 06-Mar-2021 at 05:22 AM.
Last edited by Morphix on 06-Mar-2021 at 05:14 AM.
Last edited by Morphix on 06-Mar-2021 at 05:10 AM.
Last edited by Morphix on 06-Mar-2021 at 05:05 AM.

_________________
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Amiga 500, Amiga 1230,
Amiga 4000PPC,
Sam 440EP, AmigaOne XE,
MacMini PPC, PowerMac G4, G5

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Rob 
Re: SAM 440EP / M9 Chip
Posted on 6-Mar-2021 17:26:59
#2 ]
Elite Member
Joined: 20-Mar-2003
Posts: 6031
From: S.Wales

@Morphix

The chip is an M9-CSP64. There is at least one Chinese vendor on ebay selling them for under 20. They are listed as new and unused and while it's always worth being sceptical of such claims at leasts with that cross shaped heat spreader and four RAM chips it can't be faked like a 68040 relabled as a 68060.

As for plugging in a PCI Radeon the Sam's PCI slot is keyed for 3.3v cards so it's only possible to fit a 3.3v or universal card in the slot.

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Morphix 
Re: SAM 440EP / M9 Chip
Posted on 7-Mar-2021 2:12:27
#3 ]
Regular Member
Joined: 10-Aug-2009
Posts: 449
From: Greece

@Rob

Thanks fir the reply. I will check for the chip.

How would I identify 3 3v or universal pci card?

Thanks

_________________
Peg1, Peg2, Efika,
Amiga 500, Amiga 1230,
Amiga 4000PPC,
Sam 440EP, AmigaOne XE,
MacMini PPC, PowerMac G4, G5

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Trixie 
Re: SAM 440EP / M9 Chip
Posted on 7-Mar-2021 7:01:26
#4 ]
Amiga Developer Team
Joined: 1-Sep-2003
Posts: 1979
From: Czech Republic

@Morphix

Quote:
How would I identify 3 3v or universal pci card?


https://www.ni.com/cs-cz/support/documentation/supplemental/18/pci-keying-and-voltage-compatibility.html

_________________
The Rear Window blog

AmigaOne X5000/020 @ 2GHz / 4GB RAM / Radeon RX 560 / ESI Juli@ / AmigaOS 4.1 Final Edition
SAM440ep-flex @ 667MHz / 1GB RAM / Radeon 9250 / AmigaOS 4.1 Final Edition

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