@ACE_Recliner @brennen @bhtooefr @kragen
Huh, that strikes me as odd. I was pretty sure that earlier PDP models than the one UNIX was developed on had 18 bit words, & it seems a little weird to change the word length to something without common factors. But, that was early days & maybe digital didn't care the way intel did.

I recall that, somehow, MINIX had 9-bit *bytes*. (At least, a friend who was porting MINIX to modern hardware said that & I don't think he was screwing with me.)

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@enkiv2 @ACE_Recliner@misskey.xyz @brennen @bhtooefr@cathoderay.tube I think MINIX always had 8-bit bytes, but yes, the original "Unix" ran on the 18-bit PDP-7, from 1969 to 1970. Eventually PDP-7 Unix did do multitasking, but I don't think it ever got, for example, a hierarchical filesystem. bell-labs.com/usr/dmr/www/hist is pretty much the only source on this kind of thing.

And yeah, the PDP-7 and PDP-11 were unrelated instruction set architectures.

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