On 2015-10-22 17:07, Paul Koning wrote:

On Oct 22, 2015, at 10:36 AM, Johnny Billquist <[email protected]> wrote:

On 2015-10-22 16:32, Paul Koning wrote:

On Oct 22, 2015, at 9:15 AM, Johnny Billquist <[email protected]> wrote:

...
The VT100 is field upgradeable to a VT101 (I think) or a VT102 (I know). 
However, the VT102 is not the same as a VT100 with the added AVO and printer. 
Functionally they are the same, but inside they will look different.

That doesn't sound right.

The way I remember it is that the VT100 comes in several configurations (for 
example AVO or not) and you can field modify it from one to another.

On the other hand, the VT101 and VT102 are fixed configs (that is, not intended 
to be field upgradable), roughly matching the base and AVO versions of the 
VT100 in functionality.

It may be that you could, with enough knowledge, turn a VT101 into a VT102 or 
vice versa, but that wasn't a supported operation from what I remember.

Paul, I think you just said the same thing I did. Did you misunderstand me, or 
did I do a typo somewhere?

No, you said that the VT100 is field upgradeable to the VT101 and/or VT102.  
And I said that there are several VT100 variants, and that a VT100-xx is field 
upgradeable to a VT100-yy.  But no VT101 or VT102 is field upgradeable to 
anything else, nor is a VT100 field upgradeable to a VT101 or VT102.

What I said was that the VT100 is field upgradeable to a VT102, but that this would be a functional equivalent to a VT102. They will look very different inside. I said that the VT102 is not the same as a VT100 with the added AVO and printer port.
Read the full paragraph.

To elaborate: the VT101 and VT102 are a generation after the VT100, each fixed 
config.  I'm guessing that the fixed config thing was done, as well as the 
other changes in the details, to reduce cost.  Cost reducing a product while 
leaving its features largely untouched was a standard thing to do at DEC (and 
for that matter is a standard thing to do at any manufacturing organization).

Yes. And I said that as well. :-)

        Johnny

--
Johnny Billquist                  || "I'm on a bus
                                  ||  on a psychedelic trip
email: [email protected]             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol

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