[Simh] Questions on SIMH VAX

[Zane H. Healy]

At 9:21 PM -0400 6/10/10, Rich Alderson wrote:
>  > Date: Thu, 10 Jun 2010 11:45:35 -0700
>>  From: "Zane H. Healy" <healyzh at aracnet.com>
>
>>  I thought a VAX-11//780 was both 1 MIP, and 1 VUP.
>
>Zane,
>
>ITYM "MIPS".  It's not a plural, it's an abbreviation of "second".
>
>Anyway, although Digital's marketeers tried to claim that the 780 ran at
>1MIPS, it was clearly doing about half that in any decent benchmark.  That's
>the reason they came up with the VUP, very quickly.  AFAIK, no one else ever
>bothered to use the VUP as a measure, even if they were into MIPS.
>
>                                                                 Rich

On a good day I mean MIPS.  :-)  Even VUP's was largely gone by the 
time the last of the VAXen were released.  I hadn't heard the 1 MIPS 
rating was marketing BS, but it doesn't surprise me.  Somewhere I 
used to have some pretty good speed charts with different machines 
that interested me, and ones that could be used to tie the different 
charts together.

Zane



-- 
| Zane H. Healy                    | UNIX Systems Administrator |
| healyzh at aracnet.com              | OpenVMS Enthusiast         |
|                                  | Classic Computer Collector |
+----------------------------------+----------------------------+
|     Empire of the Petal Throne and Traveller Role Playing,    |
|          PDP-10 Emulation and Zane's Computer Museum.         |
|                http://www.aracnet.com/~healyzh/               |