ZorRAM SDRAM Memory Card (www.amigakit.com)

[Zac67]

For a start, Z3 requires a 32 bit CPU...

[Zac67]

Hehehe ! 7-slot ZORRO 3: it's not enough for my A3000(T): see picture http://www.amiga.org/gallery/index.php?n=3081.

Even the towers have no more than 5 slots, so you're maxing out at 1.25 GB. But I'm sure there are several problems before you get that high. X-ray's tried 3x DKB3128 but only got up to 512 MB:
http://www.amiga.org/gallery/index.php?n=2741

[Zac67]

Since its Zorro3, I know it should work in a Zorro2 system, ...

Nope, it won't. Where are you taking this from?

[Zac67]

I know there are quite a few PICs out there auto-sensing Z III or Z II. There are designed to work that way, Usually Z2 functionality is somewhat reduced and performance is lower.

However, designing a 'large' RAM card in that manner wouldn't really make sense as Z2 could only make use of a tiny fraction of the memory. As joetee suggested, including a way to use it for fast mass storage would somewhat make sense, but there are more common and much cheaper solutions available for that - why increase manufacturing and/or development cost?

[Zac67]

Not at all sure about Z3 RAM being of any use for the PPC in MOS/OS4 ... The point is that expansion RAM as well as onboard would be so DEAD slow that you probably wouldn't enjoy it a lot. It'd be nice if AmigaKit could give us a hint here, but I'm pretty confident that it's of no use.