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Author Topic: Problem running 2 x DKB3128 on A4000T  (Read 3786 times)

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Offline X-rayTopic starter

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Problem running 2 x DKB3128 on A4000T
« on: August 21, 2008, 11:28:57 PM »
Okay, I am on a bit of a RAM mission, just for kicks.
I have two DKB boards, each with 128mb, I have 16mb on the mobo and I have another 128mb on the Cyberstorm.
I should have 400mb RAM in total.

But...I can't get more than 372mb. As soon as I put the last 32mb SIMM on the DKB board, the total goes back down to 272mb.

I can put any of the two DKBs in any Zorro slot alone, and I can see the 128mb on that board. It's not the SIMMS and its not the boards. They have the same jumper settings.

So, what gives here?
I'm running OS3.9 and I took out the Kickflash and Picasso IV for testing.

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Offline Jeff

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #1 on: August 21, 2008, 11:44:40 PM »
@X-Ray

"To Boldly go where no one has gone before" :-D

Seriously, Good Luck!
-Jeff
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Offline X-rayTopic starter

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #2 on: August 21, 2008, 11:50:39 PM »
You know it, buddy. If all goes well my Miggy is going to have three DKB boards soon!
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Offline Jeff

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #3 on: August 21, 2008, 11:54:17 PM »
Yes, mine is the third one! It'll be on it's way to you soon now I'm sure.

-Jeff
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Offline X-rayTopic starter

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #4 on: August 22, 2008, 06:42:08 PM »
Surely someone else has run two DKBs in one Miggy?
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Offline T3000

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #5 on: August 22, 2008, 11:10:12 PM »
Quote

X-ray wrote:
You know it, buddy. If all goes well my Miggy is going to have three DKB boards soon!

...surely this isn't a case of "Plug and Pray"!   :hammer:
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Offline X-rayTopic starter

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #6 on: September 06, 2008, 03:35:40 PM »
Update:

Tried 3 DKB3128 boards, and the same thing happens (I can't have more than one of them fully loaded).

The curious thing is: I can have all three of them loaded with 96mb of RAM, and that RAM is recognised just fine.

So it looks like it is not an upper RAM limit on the Zorro bus, it is a problem with how 128mb RAM is recognised per 'slot'

Will do more testing, it is very strange.
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Offline RedskullDC

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #7 on: September 06, 2008, 07:07:20 PM »
Quote

X-ray wrote:
...
The curious thing is: I can have all three of them loaded with 96mb of RAM, and that RAM is recognised just fine.

So it looks like it is not an upper RAM limit on the Zorro bus, it is a problem with how 128mb RAM is recognised per 'slot'

Will do more testing, it is very strange.


Hi X-ray,

Can you show us the output of the "ShowConfig" program?
Would be useful to see how the memory ranges are being placed.

Red
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Offline Jeff

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #8 on: September 06, 2008, 07:07:58 PM »
Have you tried (3) 32 megs and (1) 8 or 16 meg SIMM per board? That might narrow it down a little bit more.

-Jeff
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Offline amigadave

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #9 on: September 06, 2008, 09:44:35 PM »
I am wondering what the heck you are going to do with all that RAM on an Amiga???

Have you found any Amiga programs that can use more than 200mb?
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Offline amiga_3k

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #10 on: September 06, 2008, 10:49:32 PM »
Quote

amigadave wrote:
I am wondering what the heck you are going to do with all that RAM on an Amiga???

Have you found any Amiga programs that can use more than 200mb?


Sometimes the answer would simply be in the lines of 'Because I can'.... :-)
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Offline X-rayTopic starter

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #11 on: September 06, 2008, 11:03:02 PM »
The answer is (at present) because I can.
However back in the days when I was raytracing with Cinema 4D I frequently ran out of memory (and I had 128 +16 +2).

So yep, the answer is raytracing with complex objects.

I have another update here:

I found that these DKBs behave a lot better if the PIV is in slot two and a fully populated DKB is in slot 1. I can then have a fully populated DKB in slot 3, and a 96mb DKB in slot 5.
That seems to be the combination to use for now.

Total fast ram is therefore 496mb on my Amiga.
I have to test this, though.
Still not allowed to have all boards fully populated but I guess I can live with that (although it would have been cool to have a classic Amiga with 530mb RAM.
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Offline Methuselas

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #12 on: September 07, 2008, 02:34:52 AM »
Quote

X-ray wrote:
The answer is (at present) because I can.


Still not allowed to have all boards fully populated but I guess I can live with that (although it would have been cool to have a classic Amiga with 530mb RAM.




Nerd!  ;-)  :lol:  :-P
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Offline X-rayTopic starter

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #13 on: September 07, 2008, 09:06:14 AM »
Not just a nerd, a super nerd!
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Offline Methuselas

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Re: Problem running 2 x DKB3128 on A4000T
« Reply #14 on: September 07, 2008, 09:16:01 AM »
Quote

X-ray wrote:
Not just a nerd, a super nerd!


*laughs*


I have *NO* comment!



*cough*

...nerd...

*cough*

:roflmao:
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\'Using no way as way. Having no limitation as limitation.\' - Bruce Lee

\'No, sorry. I don\'t get my tits out. They\'re not actually real, you know? Just two halves of a grapefruit...\' - Miki Berenyi

\'Evil will always triumph because good is dumb.\' - Dark Helmet :roflmao:

\'And for future reference, it might be polite to ask someone if you can  quote them in your signature, rather than just citing them to make a  sales pitch.\' - Karlos. :rtf
 
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