Talk:18-bit computing

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Size of char/byte in these systems (first UNIX)

18-bit is the word size. "Two bytes + 2 kiddies"[1], probably meant just for size comparison. But byte can actually be be 18/2=9 bits in this schema. Or 18/3=6 bits. As PDP-7 was 18-bit and first Unix machine I wander what they did? I think Unix has always used at least 7-bit ASCII from C-era UNIX, but first version is pre-C assembly. Yes, C requires byte to be at least 8-bit in C99, but was 6-bit allowed at some point? comp.arch (talk) 12:00, 25 July 2014 (UTC)[reply]