[Info-vax] Y3K for PDP-11 Operating Systems

[Johnny Billquist]

On 2011-05-09 09.40, Rob Brown wrote:
>
> On Fri, 6 May 2011 at 16:13 -0600, Johnny Billquist wrote:
>
>> On 2011-05-06 12.08, G Cornelius wrote:
>>
>>> If in fact your code fit into the address space and did not need 32
>>> bit arithmetic, it could be fast. The first time I started working in
>>> a group that had VAXen I noticed two 750's sitting off to the side
>>> because they had not been able to handle the application load. Their
>>> replacement: a pair of 11/84's. Granted, this was specialized in that
>>> the language interpreter had to do a lot of single byte operations,
>>> resulting in the initial versions, on 750's at least, being rather
>>> inefficient. Sometimes extra bits just mean extra overhead.
>>
>> Heck. The 11/750 is not a fast machine. It's definitely slower than an
>> 11/84, unless you do things that the VAX can do natively and the
>> PDP-11 can't.
>
> It seemed to me that the 11/750 was even slower than an 11/44, but
> perhaps that had something to do with their respective workloads.

I don't know for sure, but I would have guessed that they were about 
equal, but maybe with a small edge for the 11/44.

	Johnny