Posted by rbanffy 4/2/2025
"I'm going to a commune in Vermont and will deal with no unit of time shorter than a season."Does anyone here know about any book(s) on the VAX, or indeed on any of DEC's machines, or IBM's stuff (which were - probably still are - beautifully engineered) come to that? I'm aware of "Big Blue", but that is mostly about IBM business practices.
IBM's 360 and Early 370 Systems by Emerson W. Pugh, Lyle R. Johnson and John H. Palmer
Computer Engineering: A DEC View of Hardware Systems Design by C. Gordon Bell (Author), J. Craig Mudge John E. McNamara
The book never explains how the team solved this restriction.
Someone asked that exact question and Carl Alsing himself (head of the Microkids) answers the question, see https://cs.stackexchange.com/questions/44915/data-general-mv...
The microcode looked at the first instruction of the handler. If it was an old instruction, a backwards compatible stack frame was created. If it was a new instruction, a new-style stack frame was created.
Data General published a couple of papers about their new 32-bit architecture.
One of the most thorough and well written pieces of journalism (it reads like a book-length magazine feature) that I’ve ever encountered. The characters and company felt so alive.
The Eagle seemed like a neat design but I never encountered a DG machine of any kind in the various companies I worked for. VAXen seemed to be everywhere, Sun and other UNIX workstations followed only to be shoved to the side by PCs in the early 90s (except for some applications like CAD and that was only for a while). Funny how such a vibrant industry segment could die so quickly.
A kind reader pointed me towards an interview with Dick Sonderegger who worked at Data General at time of the development of Eagle [1].
His view based on discussions with people who appeared in the book is interesting:
'They did not have flattering things to say about Tracy Kidder ... This is a historical novel, this is not what actually happened'.
'To a man [they said] he didn't know anything, we could have told him anything and he could have bought it. And reading the book that's accurate'
DG section is at approx 21 mins
I worked at DG for 13 years (albeit a few years post-Eagle) and I've never heard anything along those lines. And the company liked the book as far as I can tell--they regularly gave copies away at the executive briefing center.
I have no doubt there were embellishments for the purposes of narrative. And people always have different takes on all sort of things that they participated in at a company. But I've never heard it was substantially inaccurate and I knew a number of people in "the book" pretty well.
I definitely didn't intend to endorse this view. I think if it was really true that they had purposely misled him and he'd taken it all in then there would be some major technical 'howlers' in the book. As far as I can see there aren't any.
Maybe they didn't like the way they were portrayed - which I can understand - and there was a collective, organic 'well of course it wasn't like that' soon after the book was published.
No first-hand knowledge of all the internal politics that shook out in the creation of the MV/8000 (Eagle) but, again, never heard anyone say it was BS and I knew many folks both in Westboro and RTP quite well.
I'd quite like to do a follow-up post on DG. Any really good sources that I could tap into?
Might look at the Data General Alumni facebook page.
https://people.computing.clemson.edu/~mark/fhp.html
I used to have a few links on pinboard but can't find them.
You also might enjoy this: https://archive.org/details/year-in-dev/YearInDev
Mostly just some old docs but Wild Hare has served as something of an archive--though mostly pre-MV: https://www.wildharecomputers.com/
Podcast: https://www.redhat.com/en/command-line-heroes/season-4/minic...
I was very involved in this episode but my interview (along with Tom West's daughter) got left on the cutting room floor :-)
Contact info in my profile.
Funny anecdote: I've read Soul of a new machine many times over the years, and love it dearly. I stayed with my aunt and uncle last year and somehow the topic of mini computers came up. I mentioned Soul of a New Machine and my uncle said "oh yeah I worked on that computer." I was blown away. Apparently he had worked at Data General and he was on the software team (which is briefly mentioned towards the end of the book) that wrote the software the Eagle was released with.