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Old 16 October 2009, 19:53   #1
crazyegg
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A4000 Buster -09 or -11 Revision: Heat Sink On Chip

Hi All,

The Buster chip on my A4000 has a heatsink on it that is glued very tight.

Is there a way to find out the revision number (09 or 11) without removing the heatsink?

If no, what is recommended on removing a heatsink?

Regards....ed
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Old 16 October 2009, 22:13   #2
rkauer
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Depends on what kind of heatsink it is and how it was glued on top of the Buster.

Try to rotate gently the 'sink to see if it snaps off.
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Old 16 October 2009, 22:46   #3
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Originally Posted by crazyegg View Post
Is there a way to find out the revision number (09 or 11) without removing the heatsink?
A rev 11 can reportedly only support 1 Zorro III DMA master whereas a rev 9 can support multiple masters so if you use happened to have two DMA master capable cards that you could fit they would not work

i.e. A4091, Fastlane ZIII, Deneb

Last edited by alexh; 16 October 2009 at 22:53.
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Old 19 October 2009, 02:45   #4
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Hi Alexh,

Thanks for the reply.

I think I will just leave the Buster alone for now. I have bigger issues at hand....like fixing the potential leaking caps on all my Amigas...sigh....

I guess it is just a matter of time before they all start leaking right??

Regards....ed
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Old 05 August 2015, 05:46   #5
mech
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Quote:
Originally Posted by crazyegg View Post
Hi All,

The Buster chip on my A4000 has a heatsink on it that is glued very tight.

Is there a way to find out the revision number (09 or 11) without removing the heatsink?

If no, what is recommended on removing a heatsink?

Regards....ed
use a thin bladed knife like a carpet knife(box cutter etc), work it under 1 corner between chip and heatsink a bit and twist, it usually pops loose the most stubborn chips.
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Old 05 August 2015, 05:49   #6
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Quote:
Originally Posted by alexh View Post
A rev 11 can reportedly only support 1 Zorro III DMA master whereas a rev 9 can support multiple masters so if you use happened to have two DMA master capable cards that you could fit they would not work

i.e. A4091, Fastlane ZIII, Deneb

I have done this in the A4000t's to get multiple bus masters. Unfortunately most of jens stuff does not have buster9 support,at least big ram insists on buster11 iirc.
fastlane Z3,4091,deneb work with 9.
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Old 12 August 2015, 03:25   #7
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Quote:
Originally Posted by crazyegg View Post
Hi All,

The Buster chip on my A4000 has a heatsink on it that is glued very tight.

Is there a way to find out the revision number (09 or 11) without removing the heatsink?

If no, what is recommended on removing a heatsink?

Regards....ed
heat and alcohol, and be gentile with a slight twisting motion between heatsink and chip
Use 99% iso and soak heatsink for a few hours, then heat (keep it under 150 F), then back into alcohol , a few times will soften the glue and allow you to remove the heatsink with out damage
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