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Old 24 July 2017, 13:41   #141
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Originally Posted by babsimov View Post
Lew Eggebrecht explain that at the begining IBM want to use 68000 instead of 8086.
Originally Posted by matthey View Post
It is amazing that the IBM PC started with a weak 8 bit 8088 introduced the same year (1979) as the 68000. The biggest advantages the IBM PC had was that it was very open (because the U.S. DOJ was breathing down IBM's neck?) and had a company behind it with a good reputation for (business) computers. Somehow the turd improved and reached a critical mass which allowed it to dominate the market and even put superior technologies out of business with economies of scale (mainly Intel with the CPU). Most U.S. consumers chose a cheap open turd which turned into a black hole which sucked the life out of computing as the world entered the dark ages of computing.
The Lew Eggebrecht article gets it partly. The somewhat backward compatibility with 8080, z80, etc was a big plus for the 8088/8086. There were already many business machines with 8080's, z80's, etc running CP/M and compilers that could be quickly be patched to cross compile for 8088 and DOS instead of CP/M. A lot of CP/M software was ported to dos in the early days so as companies replaced older systems or expanded they couple replace with or add IBM PC's along with their existing CP/M systems and have compatibility.

I think Motorola lost the race due to the 6502, when the moto engineers left and made the 6502 and it under cut the 6800 line they started loosing business right there.

The third plus of the 8088 was the .gov contracts requiring a second source. It was a simple requirement of most .gov and .mil contracts that every component shave a secondary source and therefore Intel's licensing of the 8080/8088/8086/x86 architecture to AMD, yet it came back later to bite them in the 386/486 days but in the early days Intel and IBM were the only vendor which could meet the requirement.

The 6800 and 6500 were only available from one company each (moto and mos) though MOS did license some of the 6500's later on. Moto then broke software compatibility going from the 6800 to the 68k so the few business systems on 6800 couldn't simply migrate to the 68k. But I again think it was too late already anyway as the winner was already decided due to the first two factors.

Most don't remember before the IBM PC, the s100 bus. There was already an established open industry standard way before then and eventually the OS on those systems standardized on CP/M and the 8080's and licensees and clones so it was simple for IBM to continue the momentum. There were some 6800 based S100 systems but as the 6500 line eroded the 6800's sales no standard OS emerged.

These reasons I are why the war was already won even before the IBM PC. If you want to go back in time and change things you need to go earlier than the 68k. Start by keeping the 6800 engineers from leaving moto and starting MOStek.
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