Tapio Lehtonen wrote: > Installation guide says in Chapter 2: > > "If your system has a 64-bits AMD64, Intel EM64t or Intel Core 2 Duo > processor, you will probably want to use the installer for the amd64 > architecture instead of the installer for the (32-bits) i386 > architecture." > > Is this really true? What is installer for i64 good for, then? > > Or does Intel have in addtition to EM64t prosessors another kind of > 64-bit prosessor that is not compatible with amd64?
Bingo, the chip for "ia64" is Intel's _original_ 64-bit processor called Itanium. It is incompatible with code written for i386 (unlike AMD64 and EM64t, which were specifically created to be compatible with 32-bit x86 architecture), although I think it can run x86 code through an emulator. For this reason it never became very popular. (The fact that it was absurdly expensive and hard to write an optimizing compiler for didn't help.) Perhaps the section of the installation guide for ia64 should specifically say something like "This architecture is NOT suitable for the Intel EM64t or Intel Core 2 Duo chips -- for those use the 'amd64' architecture." It may already do so, I haven't checked. It's an unfortunate accident of history, which we now have to live with, that the Debian arch name for AMD64/EM64t is "amd64" -- it was originally going to be the brand-generic "x86-64" but that was rejected after a big fight for some reason that I don't recall. Then later Intel came out with an AMD64-compatible chip. To summarize, Debian arch Chipsets ----------- -------- i386 x86 (for x strictly greater than 3) [0] ia64 Intel's Itanium 64-bit chip amd64 x86-compatible 64-bit chips (AMD64/EM64t/etc.) [0] Debian no longer supports real 80386 chips because the GNU C++ library uses inline assembly (or something like that) that isn't supported on them. (I forget whether or not 80386 is supported in Sarge; it definitely was in Woody and will not be in Etch.) Since APT is written in C++, a Debian installation on 80386 would be essentially unmaintainable. regards, -- Kevin B. McCarty <[EMAIL PROTECTED]> Physics Department WWW: http://www.princeton.edu/~kmccarty/ Princeton University GPG: public key ID 4F83C751 Princeton, NJ 08544 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
