[Info-vax] In memoriam: 10 years since Alpha's passing away.

[Bob Koehler]

In article <c842666c-614c-44d8-b5e2-2d62c55cd129 at e21g2000vbz.googlegroups.com>, Hans Vlems <hvlems at freenet.de> writes:
> On 5 jul, 11:34, Michael Kraemer <M.Krae... at gsi.de> wrote:
>> urbancamo schrieb:
> 
> The VAX was a _true_ 32 bit architecture, right?

   The original VAX hardware architecture was spec'ed to match the 30
   bit SBI on the 11/780.  For a long time VAXen had 30 bit or narrower
   busses.  Although laid out as a 32 bit architecture in most ways, it 
   didn't become true 32 bit until an ECO to the spec several years later, 
   when VAXen were designed with wider busses.

   None of which mattered to us programmers, who had 31 bits of process
   specific virtual address space and no programs to fill it up.

   Although I'm sure others did, I never actually saw any VAX with
   SYSGEN parameters set up to map as many as 24 bits of virtual
   address space.