[Info-vax] OpenVMS I64 V8.1 "Evaluation Release"?

[glen herrmannsfeldt]

Fritz Wuehler <fritz at spamexpire-201203.rodent.frell.theremailer.net> wrote:
> Johnny Billquist <bqt at softjar.se> wrote:

>> No, the z/Arch, even in its latest implementation, does not give you 64 
>> physical address pins out of the CPU, so no way you could hook up 2**64 
>> bytes of physical memory.

> Do you have a pinout handy? If so, I defer to you.

As far as I know, they don't sell the chips separately from whole
machines, and don't publish data sheets. There might some 
maintenance manuals, but likely not.

Even if the pads exist on the chip, they might not have pins
on the package.

>> Sorry, not even close. 512 GB, or 2**39, is where the latest z/Arch 
>> machine implementation (z9 EC) is at.

> IBM is famous recently for making limitations that aren't so 
> they can sell you an upgrade with microcode. You cannot infer 
> from how much memory the system is said to support 
> (and z9 is old, btw, even z10 is EOL, so look at z196 (I think)) 
> how much it can really support. Like I said, if you or anybody 
> else has a pinout that would tell us the right answer.

Somewhere there was the documentation on avoiding the five
levels of tables. Some details might have been in there.

-- glen