Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: playgeneration on January 10, 2010, 11:53:30 AM

Title: How to upgrade a 2000 to 2MB chip RAM?
Post by: playgeneration on January 10, 2010, 11:53:30 AM
Hi guys
I want to upgrade my rev6.3 2000 from its current 1MB to 2MB chip RAM, but I'm a bit confused on how this is done. I've seen mentioned that you just need to replace the agnus/denise chips, then I have also seen on amigkit a NTSC mini megi upgrade (but my 2000 is PAL, and its an expensive purchase for just an extra 1MB), and I have also read that I may need to change a seperate RAM chip.
 
I don't want to spend a fortune doing this, having already wasted money on two 030 accelerators that didn't work/died, I just want to add more memory to my 2000 so its more useable. So can anyone help please? :)
Title: Re: How to upgrade a 2000 to 2MB chip RAM?
Post by: Speelgoedmannetje on January 10, 2010, 12:11:02 PM
I fear you can't :S considering this (http://en.wikipedia.org/wiki/MOS_Technology_Agnus)
Title: Re: How to upgrade a 2000 to 2MB chip RAM?
Post by: Tajmaster on January 10, 2010, 12:27:25 PM
Quote from: playgeneration;537467
Hi guys
I want to upgrade my rev6.3 2000 from its current 1MB to 2MB chip RAM, but I'm a bit confused on how this is done. I've seen mentioned that you just need to replace the agnus/denise chips, then I have also seen on amigkit a NTSC mini megi upgrade (but my 2000 is PAL, and its an expensive purchase for just an extra 1MB), and I have also read that I may need to change a seperate RAM chip.
 
I don't want to spend a fortune doing this, having already wasted money on two 030 accelerators that didn't work/died, I just want to add more memory to my 2000 so its more useable. So can anyone help please? :)

Hi
 
You can upgrade an A2000 to 2MB chip ram using the DKB Megachip, Ive done this on a rev. 6.0 motherboard before and it will definately work on your 6.3 board. The manual states that you need to do some "modding" on the rev. 4.x boards but Ive never seen one so cant comment on that.
 
Its just a case of slotting in the MegaChip and then connecting the "fly lead" from the MegaChip to pin 36 on Gary, it takes all of 2 minutes to do that bit :) You do need the MegaChip though, I dont think you can do it any other way as far as Im aware.
Title: Re: How to upgrade a 2000 to 2MB chip RAM?
Post by: Fats on January 10, 2010, 01:57:19 PM
Quote from: Tajmaster;537473

You do need the MegaChip though, I dont think you can do it any other way as far as Im aware.


AFAIK on the A2000 board only enough address lines are routed to address 1MB of chip RAM. Therefor an extra board is needed to expand chip RAM to 2MB.

greets,
Staf.
Title: Re: How to upgrade a 2000 to 2MB chip RAM?
Post by: Karlos on January 10, 2010, 02:23:10 PM
Normally you'd need at least the clinically obese version of Agnus, but I think the DKB Megachip above pretty much sorts it out, provided your motherboard is of the right revision.
Title: Re: How to upgrade a 2000 to 2MB chip RAM?
Post by: playgeneration on January 10, 2010, 05:35:33 PM
ok thanks for the info, I guess it was too much to hope for it to be a simple and cheap upgrade :)
Title: Re: How to upgrade a 2000 to 2MB chip RAM?
Post by: save2600 on January 10, 2010, 05:38:50 PM
Quote from: playgeneration;537543
ok thanks for the info, I guess it was too much to hope for it to be a simple and cheap upgrade :)


Simple and cheap are two words Amigans have forgotten the meaning of. :lol:

Must say though, easiest (not cheap) solution is the DKB or similar MegaChip device. One wire to a pin off Gary, insert into the Agnus spot and you're done. Expect to pay $70-$90 for one of these fun little projects.