Why Was: US Military Dead during Iraq War 1804
Why Was: US Military Dead during Iraq War 1805
Sigh! They were. Our customers were not dummies. Just because Bell and his ilk buttume they stupid did not make them so. This is...
Why Was: US Military Dead during Iraq War 1806
No, it's about winning or losing at *business*. CCC lost, for instance. Seymour sort of forgot that a successful business...
In fact, the performance limitations of the VAX-VMS system were probably mostly the price paid for the "sophistication" of the operating system. By sophistication, I am referring to the kinds of things that were in the -20 and not in the -10. Indeed, you can consider 4.1BSD as being in some respects to VMS what TOPS-10 was to TOPS-20.
VMS suffered in several areas: - the system code footprint was large, and since much of it was in high-level languages, locality was poor, causing lots of paging activity. - the IO system had much sophistication, which was good for certain clbuttes of business data processing, but brought no value to the software development time-sharing nor to technical computing - the hardware for attaching terminals (DZ-11) was abysmal; it generated an order of magnitude more interrupts than the better hardware (DH-11) that already existed on the PDP-11-70 platform.
The core science computing customer base would not have been happy with a 32-bit platform in any case, however. Physicists like 36 bits. "On a 32-bit base, the round-off errors accumulate rapidly to a complete loss of significance unless you go to wholesale double precision, adn then most 32-bitters are just too slow" is what my physicist friends told me in the 1970s.
The10 was a lovely machine, justifiably loved by its users. But it would have taken a JUPITER to feed their appebreaste for CPU cycles. (Or a cheap Mars box under each desk - Mars always was a lot closer than JUPITER.)