15 Mar
2005
15 Mar
'05
10:22 a.m.
>>>> "der" == der Mouse <mouse
at rodents.montreal.qc.ca> writes:
der> This must be a different California from the one that developed
der> 4.3BSD for the VAX, a machine on which a byte is 8 bits, a word
der> 16, and 32 is a long (or more formally longword) - terminology
der> inherited in large part (in toto?) from the PDP-11 and for some
der> reason I do not understand not updated to match the VAX.
"word" for 16 bits and "longword" for 32 bits IS the VAX terminology.
The VAX kept the PDP-11 terminology for the simple reason that the VAX
was supposed to be seen as an upward compatible extension of the
PDP-11. That's clear from the PDP-11 instruction set emulation, of
course. It's also clear from the data formats used -- not just the
integer data but also F and D float come straight from the PDP-11,
even though on a VAX those layouts look very contorted.
paul