On Wed, 21 Jun 2000, Bill Freeman wrote:

> >   >> CAR and CDR refer to a register in the IBM 704.
> > 
> > Specifically, contents of the A register, contents of the D register.
> > IBM hardware of that vintage were single accumulator machines.  The
> > A register was the accumulator; D was an extension register for
> > double length products and dividends.  Useless trivia, of course, but
> > immortalized forever by Johm McCarthy.
> 
> Ever notice the similarity with AX, DX on the 80X86 with respect to
> multiply and divide?

Remember the A register on the 6502?   8-bit only, no D necessary... :)


-- 
Derek Martin
System Administrator
Mission Critical Linux
[EMAIL PROTECTED] 


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