Advanced Micro Devices Inc (AMD)

[Saturn V]

My mistake.

....Wow I am impressed ! That is your first ever admission of a mistake that I can recall. So I shall respond briefly to the issue you raised:

IBM did not choose Motorola 68K because:
(a) It was unobtanium in the volumes and price points needed, and much more expensive than 8088 at that time.
(b) IBM management was not willing to have a cheap processor addressing 32bit memory space.This was to achieve "Market Segmentation" and protect its existing installed software base. The 8088 memory scheme was perceived to be a dead end, and thus not as a future threat to IBM. So Motorolas elegance became its enemy in this situation.

National 32K was still very very buggy, and did not get cleaned up for years.

IBM quickly embraced 286 as well, since that still did not pose a threat to the IBM installed software base. However IBM did not want to touch 386 at all, since that had a clean 32 bit addressing model.It took Compaq to take the lead on the 386, and reluctantly IBM followed. However the Software Industry was not cleanly able to use the 32bit addressing space for almost another 10 years, since IBM had done a good job in making it akward to exit the confines of the 8088 memory model.

Intel signed a second source agreement for 8088 and 80286 only. It never signed a second source agreement for the 386. Howver that issue has been litigated to death, and let us leave it that.