On Nov 15, 2013, at 10:18 AM, Robin Becker wrote: > The pdp 10/15 had 18 bit words and could be organized as 3*6 or 2*9
I don't know about the 15, but the 10 had 36 bit words (18-bit halfwords). One common character packing was 5 7-bit characters per 36 bit word (with the sign bit left over). Anybody remember RAD-50? It let you represent a 6-character filename (plus a 3-character extension) in a 16 bit word. RT-11 used it, not sure if it showed up anywhere else. --- Roy Smith r...@panix.com
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