[TUHS] Re: pseudo tty history

[Al Kossow <aek@bitsavers.org>]

On 8/16/25 6:16 PM, Al Kossow wrote:
> On 8/16/25 6:13 PM, Al Kossow wrote:
>> On 8/16/25 6:05 PM, Larry McVoy wrote:
>>> On Sat, Aug 16, 2025 at 08:21:30PM -0400, Aron Insinga wrote:
>>>> The PDP-6 had a sign on it that said something like "This machine
>>>> is old and flaky so don't touch it unless you know what you are doing."
>>>
>>> Wasn't there a PDP-<something> at MIT, I think, that had a switch labeled
>>> "magic" and "more magic" that had wires that went nowhere but it only
>>> worked when set to "more magic"?  I'm sure I have the details wrong but
>>> I have a pretty strong memory of that.  Anyone able to confirm?
>>>
>>
>> https://github.com/PDP-10/its/issues/1232
>>
>> the switch still exists
>>
> https://www.youtube.com/watch?v=_y0nVBpclIE
> 

wow, that description is completely wrong.
the PDP-6 was built from discrete PNP negative logic,
not TTL, at which point I stopped listening

it was useful for the picture of the switch though