Minix

[woodelf]

Allison wrote:

>Ok it's very obvious you know nothing of PDP-11s.  First, 64kb of memory.
>PDP11s have memory mapped IO so the TOP 8kb of memory is IO space.  Typically
>a loaded PDP11 without MMU is 24-28kW of ram (words as its a 16bitter).
>
>  
>
So what is 8k between friends. If  the truth be known the only thing a 
know about a 11
is that they are nice machines.

>Now with all that been said about models, boards and busses.  You expressed 
>no wish other "I want one.".  Well lets all drop a 11/70 mid sized system on
>you.  Figure about 500 pounds and 3 6ft racks plus a few washing machine 
>sized disks. Got a spare room with air conditioning. Don't forget you 
>need a 220V 30A drop for that.
>
>  
>
I got stairs ... no comment :)

>Oh, too big.  Ok how about an microPDP11 on about 30" deep, 27" tall and 
>8" wide. Runs on 120V maybe 4-5a max.  Oh weighs in around 60pounds with 
>a single hard disk of 30mb. Should easily cost more to ship than buy. 
>Shipping will cost a bomb due to both size and weight.  The disk should 
>be removed and packed seperately. Not a lot of those around but a great find.
>  
>
yep... I figure a good 1500 miles of shipping from the USA, but then I 
don't need overnight express.

>So thats cheap and common usually the BAll-S. Recognizable by the three 
>toggle switches on the front. had plenty of bus and power for most Qbus
>boards.  No disk bays and generally meant for rack mounting. So usually 
>you want one of these in a rack of the 48" or taller.  Then disks like 
>RX02 and RL02 are easily mounted. Not shippable except by freight. The 
>good news is of all PDP11s they are most common and often free.  Try 
>your local university.
>  
>
If I had one,  I could of  snagged one already from there.

>Allison
>  
>