My statement stands. Machines with 64-bit buses do still use 32-bit addressing schemes. Obviously, however, not all of them do. Note that IBM has introduced an new operating system for the Z Series. (Windows and most UNIX implementations support 32-bit addressing.)
If you remember, the original PCs had an 8-bit bus and a 16-bit addressing scheme, so the relationship between bus width and number of bits in the address can go either way or, as in the case of the Z Series, be identical. Bill Potts, CMS Roseville, CA http://metric1.org [SI Navigator] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Carter, Baron Sent: Monday, January 07, 2002 07:40 To: U.S. Metric Association Subject: [USMA:17315] Re: Duodecimal System Marcus, Bill >In any case, bus width is a speed issue, not an addressing one. A 64-bit bus >can be used to retrieve twice the same amount of data as a 32-bit bus, given >the same clock speed. Machines with 64-bit buses still use 32-bit addressing >schemes. > <Again, I'm also fully aware of that. But I guess our audience would benefit for your opportune <clarification above. And indeed machines in the market with 64-bit buses are not "pure" 64-bit <machines. But one day they will (and I guess that will be pretty soon, less than 3-5 years, I'd <say). Are you saying that the new IBM zSeries machines are not pure 64-bit? Their Control Registers and General Purpose Registers are 64-bit. http://www-1.ibm.com/servers/eserver/zseries/900extends.html btw, note that metric takes precedence over ifp in most cases. Baron Carter
