On Wed, 27 Jun 2001, Johnny Billquist wrote:

> The only problem with all this speculation is that the drawings for the
> 11/780 will only give you the micromachine. You still need the microcode
> for the VAX to make it a VAX. And microcode means memory. And that is
> where your bottleneck for the 500 MHz version sits.
> 

Got a 780 to pull ucode from :)

> Oh, and yes, there is quite a lot of microcode for the VAX. :-)
> 

Only about 80K bits IIRC. Stick it into some modern cache rams (12ns),
and you could get 83MHz...

> Hmmm, is there any smaller type of floppies than 3.5 inch? We need
> something cute for the front end...
> 
> Oh, and making a VAX-11/780 also means you need to implement a F-11...
> (Or did the 11/780 have a T-11?)
> 

Or, how about building it on a QBus card with a CIB interface. Then you
just plug it into the console computer and away you go :)

> 	Johnny
> 
> Johnny Billquist                  || "I'm on a bus
>                                   ||  on a psychedelic trip
> email: bqt@update.uu.se           ||  Reading murder books
> pdp is alive!                     ||  tryin' to stay hip" - B. Idol
> 
> 
>