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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Kernel on July 15, 2015, 01:55:11 PM

Title: Amiga 3000 RAM - How To Identify
Post by: Kernel on July 15, 2015, 01:55:11 PM

I have some RAM (4 PACKS OF 8 ZIP CHIPS EACH) from A3000's I used to have but I don't remember how much each actually is :/ - can someone tell me how to identify the quantity based on the chip markings?

(2) Qty 8: TC514256AZ-80

(1) Qty 8: KM44C258AZ-8

(1) Qty 1: TC514256AZ-80 ;  Qty 7: KM44C258AZ-8

Thanks.

Title: Re: Amiga 3000 RAM - How To Identify
Post by: hese7 on July 15, 2015, 02:30:37 PM

Each chip is 128kB (256k x 4bits).

Title: Re: Amiga 3000 RAM - How To Identify
Post by: Kernel on July 15, 2015, 03:15:40 PM

Quote from: hese7;792461

Each chip is 128kB (256k x 4bits).

Thanks... so it looks like I have a total of 4MB here.

Title: Re: Amiga 3000 RAM - How To Identify
Post by: zipper on July 15, 2015, 05:45:48 PM

Those xx258xx ones are static column I think (supporting burst).

Title: Re: Amiga 3000 RAM - How To Identify
Post by: VingtTrois on July 15, 2015, 07:19:22 PM

Avoid mixing these chips (xx514256 with xx514258 and/or 70ns with 80ns) inside the Amiga 3000. For example, my DENEB card doen't like the different chips manufacturers mounted on the A3000 motherboard (FastRam).