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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: leofoe on February 01, 2006, 02:27:48 PM

Title: A3000 ZIP RAM
Post by: leofoe on February 01, 2006, 02:27:48 PM

I checked my A3000 which ZIP RAM it has. On the chips I can read: NEC D424400V-70. Are they 256kx4 or 1mx4? Googled, but did not find this information.

Title: Re: A3000 ZIP RAM
Post by: Zac67 on February 01, 2006, 06:20:36 PM

xx4400 are 1Mx4.

Title: Re: A3000 ZIP RAM
Post by: jiffydos on February 01, 2006, 07:07:45 PM

Also of imoprtance is that they are page mode, not static mode.

Title: Re: A3000 ZIP RAM
Post by: tonyvdb on February 01, 2006, 07:33:14 PM

Very hard to find and exspencive :-o

Title: Re: A3000 ZIP RAM
Post by: justthatgood on February 01, 2006, 08:06:16 PM

That's probably one reason why I wouldn't be able to have an Amiga 3000, the hunt for zip ram.  It's bad enoughI have to find some more Zip Ram for my Two Apple IIgs's and my Apple IIc. Err, 24 of them and 16 more to find.  I just love vintage computer products.

Title: Re: A3000 ZIP RAM
Post by: koaftder on February 01, 2006, 09:33:33 PM

@AmigaKit

I'm supprised you guys arent stocking the a3000 zip ram. I have 3 banks to fill and while i'm at it i would buy a new kick rom.

I'm sure lots of other people would like to max out their a3000s as well.

Title: Re: A3000 ZIP RAM
Post by: Zac67 on February 01, 2006, 09:56:24 PM

Yeah - I'm still looking for the 4th bank of static columns to replace the current fast page ones. You can get them from Softhut, but they're $32 a 4 MB set.
That's $4,000 for 'standard' 512 MB. :lol:

Title: Re: A3000 ZIP RAM
Post by: corpsicle on February 01, 2006, 10:13:32 PM

What is the maximum ram in a a3000 ?
I happened to buy a a3000 real cheap and it has 12mb fastram.

Title: Re: A3000 ZIP RAM
Post by: koaftder on February 01, 2006, 10:16:03 PM

Quote

corpsicle wrote:
What is the maximum ram in a a3000 ?
I happened to buy a a3000 real cheap and it has 12mb fastram.

16mb fast, 2mb chip, check http://www.l8r.net/technical/t-3000ram.shtml for more detials

Title: Re: A3000 ZIP RAM
Post by: tonyvdb on February 01, 2006, 10:18:05 PM

16mb of fast ram and 2mb for graphics. You can install a memory expantion board but they are impossible to find.

Title: Re: A3000 ZIP RAM
Post by: leofoe on February 02, 2006, 12:29:09 PM

Quote

jiffydos wrote:
Also of imoprtance is that they are page mode, not static mode.

So I couldn't mix them with these (http://cgi.ebay.nl/ws/eBayISAPI.dll?ViewItem&item=8757213478&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1)?

Title: Re: A3000 ZIP RAM
Post by: Phonic on February 02, 2006, 01:51:34 PM

Here's my A3000 fully populated:

Pic1 (http://members.cox.net/phonic/A30001.JPG)
Pic2 (http://members.cox.net/phonic/A30002.JPG)

In the middle of a battery replacement right now.

Title: Re: A3000 ZIP RAM
Post by: mgt-se on February 02, 2006, 02:12:32 PM

Use SIMM's instead, even though these old SIMM's might be quite difficult to get now (and rather expensive too) it's still better than trying to get ZIP's.

You'll need to build one of these but it's not that hard.

http://www.aminet.net/package.php?package=hard/hack/PS2_adapter.lha

Title: Re: A3000 ZIP RAM
Post by: jiffydos on February 02, 2006, 03:15:37 PM

Not that hard?  I tried... and gave up.  :)  I couldn't find anyone that would actually print the board for me... and I didn't want to make all those etchings by hand.  

Maybe I'll do it some day.

I think someone like elbox of amigakit should make a nice big run of zip2sim boards.  They'd sell 100 I bet.

Title: Re: A3000 ZIP RAM
Post by: Oliver on February 02, 2006, 03:46:09 PM

If you want to make boards at home, you can try a toner transfer method.  Use laser print or photocopy onto transparency or some common photopapers, and iron onto a copper clad board.  The toner acts as an etchant mask.  Don't have to bother with photoresist, light boxes, etc.  It's not the most precise method, but it does work, and cuts some of the hardware costs.  After having trouble with noise on breadboard circuits, I do all my prototyping this way.  It is possible, though tricky, to do double sided boards, enabling one to use a handy ground plane.  Most beneficial.

-Oli

Title: Re: A3000 ZIP RAM
Post by: leofoe on February 02, 2006, 04:00:44 PM

Quote

leofoe wrote:

Quote

jiffydos wrote:
Also of imoprtance is that they are page mode, not static mode.

So I couldn't mix them with these (http://cgi.ebay.nl/ws/eBayISAPI.dll?ViewItem&item=8757213478&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1)?

Nobody? Jiffydos?

Title: Re: A3000 ZIP RAM
Post by: tonyvdb on February 02, 2006, 04:28:02 PM

Unfortunatly, No you can not.

Title: Re: A3000 ZIP RAM
Post by: CatHerder on February 02, 2006, 06:21:32 PM

I posted about a month or so ago links to three or four different supplies of ZIPs that have literally thousands in stock. But darned if I can find the thread on here. (I don't recall the name of the thread either, but I do know a few other people chimed in with their chip numbers.)

I'm assuming the original thread predated 2006 and the search function for this forum doesn't seem to go beyond Jan 1/2006 for some bewildering reason.

The RAM isn't all that rare, all you need to know are the ZIP part numbers and you can find 10,000 of the things in 10 minutes of looking... I found 3 sources in the USA and 5 sources in Japan within 5 minutes of googling.

Title: Re: A3000 ZIP RAM
Post by: Zac67 on February 02, 2006, 07:04:16 PM

@Herder
I contacted two suppliers and they wanted to sell for like $10 a piece for 40 pcs...

@leofoe
AFAIK you can mix them, but you'd have to put the fast page ones on the first bank since that's the one tested at POST to decide burst/no burst. I've got a set of FPs lying around for months but have yet to put them in (I'd prefer getting SCs so I wouldn't have to pull out the first bank).