Amiga 3000 Chip Revisions

[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?

[Motormouth]

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_HardwareGuide/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.

[Motormouth]

@Kernel


from
http://ic-k.iclocator.com/KM44C258AZ_KM44C258AZ_KM44C258AZ8_KM44C258AZ8KM4.html

km44c258az-8
looks like static mode 256kx4 80ns ram from Samsung

the
tc514256az-80
from the ic code is 256kx4 80ns ram from toshiba, I don't know if it is static or page

Do you have 4 megs of fast ram total?  and all the zip sockets full