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[Kernel]

I did a few searches but didn't find what I'm looking for...

With the recent dusting off of my A3K from the garage, I'm trying to figure out what chip upgrades I need to do.

I've got the 390539-11 Super Buster so appear to be all set there. However, when looking on Wikipedia (which we all kow is sometimes not accurate, haha) it indicates the following for the DMAC and RAMSEY combination:

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Ramsey & (Super) DMAC - In the A3000 and A4000 series, Ramsey controls the on-board 32-bit Fast RAM and provides address generation for SDMAC. The SDMAC in the A3000/T provides DMA and bus interface for the integrated WD33C93A SCSI controller. SDMAC rev 02 requires a Ramsey 04 and SDMAC 04, a Ramsey 07 counterpart.

The previous 16-bit DMAC used in A2091/A590 SCSI adapters also includes 24-bit address generation
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The issue here is that my chips are 390537-04 Super DMAC and 390541-04 Ramsey which apparently is not the proper combination. The way it is worded with one chip revision "requires" another makes me think mine shouldn;t even be working.

Can someone tell me what the best/preferred combination is for these chips?

Also, were there any newer revision of Agnus beyond 318069-03 or Fat Gary beyond 390540-02?

Thanks!

[Motormouth]

Interesting.....

I always thought it had to be (DMAC v2, Ramsey v4) and (DMAC v4, Ramsey v7) combinations also.

Which type of 32 bit fast ram do you have?

[Zac67]

Originally Posted by Kernel

The issue here is that my chips are 390537-04 Super DMAC and 390541-04 Ramsey which apparently is not the proper combination.
Can someone tell me what the best/preferred combination is for these chips?

When writing that article I wasn't able to find any more accurate information to rev compatibilities, sorry. The article relies on information from CBM who apparently didn't test all combinations. If yours works it's fine.

Also, were there any newer revision of Agnus beyond 318069-03 or Fat Gary beyond 390540-02?

There may be a few Agnus versions that work but there's no difference in performance, so nothing to worry about.

[Kernel]

Wow, I got a reply from the article author! Nice!

As for the type of RAM, I'll need to tear it apart to check it. Once I replace the battery I'll look at that. It's gonna be a week or so however.

[alexh]

AFAIK DMAC -04 will work with RAMSEY -04 but DMAC -02 will not work with RAMSEY -07

If you have the rare DMAC -04 then you could and should get a RAMSEY -07. They should be cheap as they were made and used in A4k (whereas the DMAC -04 is very rare and expensive).

DMAC -04 and RAMSEY -07 is supposed to be the best combination for using accelerators.

[AmiDude]

Originally Posted by alexh

AFAIK DMAC -04 will work with RAMSEY -04 but DMAC -02 will not work with RAMSEY -07

For your information; My A3000 has a DMAC02 + RAMSEY07 combination, and it works flawless.

[VingtTrois]

@AmiDude & Kernel: what's the revision of your motherboard?

[AmiDude]

Originally Posted by VingtTrois

@AmiDude & Kernel: what's the revision of your motherboard?

Latest Rev. 9/03

[Zac67]

Originally Posted by Kernel

Wow, I got a reply from the article author! Nice!

Just a rather 'raw' article - I just wanted to make some info a bit more public.

I'll add the revision matching info to wp right away!

[alexh]

Originally Posted by AmiDude

For your information; My A3000 has a DMAC02 + RAMSEY07 combination, and it works flawless.

Well if that's the case then it's all bollocks then

[Kernel]

Mine is a 6.1 Modified.

[Motormouth]

Originally Posted by Kernel

Wow, I got a reply from the article author! Nice!

As for the type of RAM, I'll need to tear it apart to check it. Once I replace the battery I'll look at that. It's gonna be a week or so however.

Check out
http://amiga.serveftp.net/A3000_Hard...de/memory.html

It has been awhile trying to remember........
I was asking about the fast ram you have, I think Static Column memory can be used in column and burst modes, but page mode is more compatible with CPU cards. The Ramsey effect these modes.

If you have CPU Card these enhanced static column memory modes are not useful.

check out Set Ramsey on Fred Fish disk 567 (probably also on aminet)

SetRamsey A program that allows you to test the current settings
of the RAMSEY ram controller chip on an Amiga 3000
under Kickstart 1.3 or 2.0, and change them if you
wish. Useful for hardware debugging to control static
column mode, burst mode, or change the refresh rate.
Version 1.50, update to version 1.02 on disk 423.
Binary only. Author: Nic Wilson.

[mechy]

Originally Posted by AmiDude

For your information; My A3000 has a DMAC02 + RAMSEY07 combination, and it works flawless.

I can second this, i have had a A3000 with dmac2/ramsey7 that seemed to work fine,but i also tried this in another 3000 and it did not live together.. go figure. not sure what is causing the incompatibility to this day.

mech

[Zac67]

There are several tools on Aminet for showing/changing Ramsey settings.

Static column ZIPs support 68030 bursts but pose no benefit w/ '040. They als require Kick 3.x for '040/060 boards to boot (there's a bug in 2.x ROMs enabling bursts with '040s although Ramsey only supports '030 bursts).

[zipper]

Originally Posted by Zac67

There are several tools on Aminet for showing/changing Ramsey settings.

from which I think systemprefs is the best one as it helps with 060 CPU settings, too.