[vcf-midatlantic] Museum 3B1 & PDP-8

Dave McGuire mcguire at neurotica.com
Fri Nov 1 12:32:32 EDT 2019

On 11/1/19 12:25 PM, David Riley via vcf-midatlantic wrote:
>> I seem to recall that vi relied on ed and ex. In Linux I don't this is
>> the case any longer. I don't know about BSD but would expect that this
>> is the case there also.
> Both BSD and SysV (which a 3B1 would likely be running) have vi. Beware, though: it is not the vi you're probably used to, it runs in line mode (not hugely different from ed).

  No, that's "ex".  The ex editor was later extended with a "visual"
mode, which is run when ex is invoked as "vi", by looking at argv[0].
The visual mode is the full-screen mode that everyone is used to.

  And the 3B1 runs System V release 2, with some minor BSD extensions.
It's not a particularly "early" UNIX.


Dave McGuire, AK4HZ
New Kensington, PA

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