[Info-vax] VAX vs. MV/8000 [was Re: Hard links on VMS ODS5 disks]

[Arne Vajhøj]

On 8/22/2023 9:36 PM, Rich Alderson wrote:
> =?UTF-8?Q?Arne_Vajh=c3=b8j?= <arne at vajhoej.dk> writes:
>> VAX + VMS                               Eclipse MV + AOS/VS
...>> ---------                               -------------------

>> 16 bit compatibility mode               16 bit compatibility mode
> 
> Wrong!  See below.

> Unlike the PDP-11 mode bit in the VAX, the MV/8000 used the same method as the
> Eclipse to add 32 bit intructions to the mix:  A previously unused set of NOPs
> was turned into the prefixes for the 32 bit instruction set.

So you say that the Eclipse MV was "Eclipse compatible" instead
of having "Eclipse compatibility mode"?

Arne