[TUHS] [pups] Ancient Unixes

[TUHS] [pups] Ancient Unixes

[Guy Sotomayor]

On Mon, 2006-04-24 at 16:44 -0500, Norman Wilson wrote:
> Bill Cunningham:
> 
>     I am copying all I can from the unix archive and will burn it to cd
>   because I know how precious they are. But what I was thinking was v5,6,7 for
>   example. Take them and add USB support. Linux would be a good example from
>   which to draw from. Because it's Posix. Much more could be adde to /dev.
> 
> =======
> 
> Has anyone ever made a UNIBUS or Qbus USB card?

The problem isn't so much the hardware, it's the software.  A USB stack
(OHCI/UHCI) isn't exactly small and I doubt you could create a driver
stack that would fit in a PDP-11's 16 bit address space (ie TCP/IP is a
stretch in that it only works on systems with 22-bit addressing and I'd
say that a USB stack is *at least* as complicated as a TCP/IP stack).

-- 

TTFN - Guy

[pups] [TUHS] Ancient Unixes

[Norman Wilson]

Bill Cunningham:

    I am copying all I can from the unix archive and will burn it to cd
  because I know how precious they are. But what I was thinking was v5,6,7 for
  example. Take them and add USB support. Linux would be a good example from
  which to draw from. Because it's Posix. Much more could be adde to /dev.

=======

Has anyone ever made a UNIBUS or Qbus USB card?

Norman Wilson
Toronto ON

[TUHS] [pups] Ancient Unixes

[Toby Thain]

On 24-Apr-06, at 5:00 PM, Guy Sotomayor wrote:

> On Mon, 2006-04-24 at 16:44 -0500, Norman Wilson wrote:
>> Bill Cunningham:
>>
>>     I am copying all I can from the unix archive and will burn it  
>> to cd
>>   because I know how precious they are. But what I was thinking  
>> was v5,6,7 for
>>   example. Take them and add USB support. Linux would be a good  
>> example from
>>   which to draw from. Because it's Posix. Much more could be adde  
>> to /dev.
>>
>> =======
>>
>> Has anyone ever made a UNIBUS or Qbus USB card?
>
> The problem isn't so much the hardware, it's the software.  A USB  
> stack
> (OHCI/UHCI) isn't exactly small and I doubt you could create a driver
> stack that would fit in a PDP-11's 16 bit address space (ie TCP/IP  
> is a
> stretch in that it only works on systems with 22-bit addressing and  
> I'd
> say that a USB stack is *at least* as complicated as a TCP/IP stack).


No, it certainly is possible. I've used USB stacks on much smaller  
devices, such as Microchip PIC18. That is not a full-featured stack,  
but certainly enough to do quite a lot.

TCP/IP doesn't have to be large either. See Adam Dunkel's uIP: http:// 
www.sics.se/~adam/uip/

--Toby

>
> -- 
>
> TTFN - Guy
>
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