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Re: Newbie Questions
- To: info-mcl@digitool.com
- Subject: Re: Newbie Questions
- From: eliot@cs.umass.edu (CHRISTOPHER ELIOT)
- Date: 17 Apr 1995 18:47:19 GMT
- Organization: University of Massachusetts/Amherst
- References: <199504170500.BAA14731@digitool.com>, <199504171736.LAA19976@somnet.sandia.gov>
- Sender: owner-info-mcl@digitool.com
>> BTW, what's this "car" and "cdr" I see all over the place?
>Car: Contents of address register, or something you drive.
>Cdr: Contents of decrement register. Pronounced "coulder" as in
> "I Cdr had a V-8. In my Car, instead of an Atom."
I knew someone whose licence plate was HLRZ. Goes back
to the pdp-10 days when there was a 36 bit word, divided
into two 18 bit halves and an 18 bit address space.
Moving half, left to right, zero-extended with indirect
addressing was very useful to Lisp implementors.
-Chris Eliot
>--
>Shannon Spires
>svspire@sandia.gov
>
>"We don't need no stinking 'first' and 'rest'."
>