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- From: tracer@majestix.cs.uoregon.edu (Roger M. Wilcox)
- Subject: Re: Motorola couldn't make enough 68000's
- Message-ID: <1993Jan3.044105.422@cs.uoregon.edu>
- Sender: news@cs.uoregon.edu (Netnews Owner)
- Organization: University of Oregon Computer and Information Sciences Dept.
- References: <28DEC199212022792@moose.cccs.umn.edu> <1hnqn1INN5le@tamsun.tamu.edu> <1992Dec29.042742.28238@actrix.gen.nz>
- Date: Sun, 3 Jan 1993 04:41:05 GMT
- Lines: 36
-
- In article <1992Dec29.042742.28238@actrix.gen.nz> Steve.Withers@bbs.actrix.gen.nz writes:
- >
- >I hate to re-hash arguments that have occurred over the years in other
-
- Too late!
-
- >newsgroups.....but my understanding is that IBM went with the Intel 8088
- >because Motorola - at that time - simply could not produce the 68000 chips in
- >the quantities that IBM required them.
-
- My understanding was that IBM, after the failure of its first microcomputer
- in 1975 (it cost $5000 without disk drives!), decided that they had to be
- able to build PCs out of the least expensive parts available. This meant,
- among other things, that the data bus for the yet-to-be-implemented IBM PC
- would have to be eight bits wide.
-
- Not sixteen bits wide, eight bits wide.
-
- Intel produced an 8-bit version of their 8086 called the 8088, which (like
- the 8086) had a one-megabyte addressing space and could run at the 4.77 MHz
- clock speed common to most inexpensive-but-reliable microcomputer hardware
- avaliable at the time. Motorola, on the other hand, was around a year away
- from producing the 68008 (their 8-bit 68000), which would certainly have been
- the chip of choice for the PC had it been released earlier.
-
- So, naturally enough, Big Blue went with Intel's latest entry into the
- descended-from-the-8008 line of processors (the 8088), because it had the
- required Eight Bit Data Bus.
-
- (Now then, why *Teradata* decided to use 8086's (*not* 8088's) for their
- massively-parallel DataBase Computers, instead of the 68000, is beyond me.)
-
- --
- Roger *M.* Wilcox (aka Jeff Boeing)
- tracer@majestix.cs.uoregon.edu
- Aleph null bottles of beer on the wall, aleph null bottles of beer, ...
-