Fortress Rochester
by Frank G. Soltis · first published 2001
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3HN commenters
2014–2025first – last mentioned
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If you're into operating systems design I defiantly recommend buying and reading through http://www.amazon.com/Fortress-Rochester-Inside-Story-iSerie.... The i OS is very different than UNIX and this book was quite enlightening to me. Some of the stuff done is quite visionary. The hardware micro-architecture has fundamentally…
on “Welcome to the public AS/400” ↗…space for tag bits. When the AS/400 was moved to POWER processors, IBM added extensions for OS/400 called PowerPC AS[0], and uses some "magic" to store a tag bit in the ECC bits of standard RAM. Also, "Fortress Rochester" by Frank Soltis (the follow up to Inside the AS/400) gives a detailed look at the differences compared to other systems. [0] https://www.devever.net/~hl/ppcas
on “Games for IBM AS/400” ↗…transparent to higher layers, i.e. if an object isn't in ram it will page it in.. The designer of System/38 etc. Frank Soltis wrote a couple of interesting books on it - Inside The AS/400 and its 2nd edition Fortress Rochester: Inside the iSeries. They're out of print and expensive unfortunately, I wish I hadn't gave my copy away.
on “Inferno-OS: distributed operating system where everything is a file, with 9P” ↗I just finished reading "Fortress Rochester" by Frank Soltis, the designer behind the IBM System38/OS400/iSeries sw. It's a fascinating book, very approachable for the density of the technical detail contained, and shows how very different choices…
on “Unix Conspiracy (1991)” ↗…moment) Inside the AS/400 [1] by Frank Soltis. He was the father of the System/38 /AS400, and also worked on the Cell processor. I haven't read this edition, but I did read the following edition called 'Fortress Rochester', and it is a good and detailed overview of the system - history, design choices, and hardware/software. As for RPG, it was made to be familiar to punch-card operators/programmers so they could switch…
on “Unix-like OS in Rust inspired by xv6-riscv” ↗> I just finished reading "Fortress Rochester" by Frank Soltis, the designer behind the IBM System38/OS400/iSeries sw. There's a copy of the previous version, Inside the AS/400, also by Frank Soltis on archive.org https://archive.org/details/insideas4000000solt/
on “Unix Conspiracy (1991)” ↗Here's a link to Inside the AS/400 by Frank Soltis, one of the lead designers. It's an interesting introduction to the AS/400, up to the POWER transition. There's also Fortress Rochester by the same author that goes into the iSeries / POWER4, but I haven't found a copy on line. https://archive.org/details/insideas4000000solt/
on “Pub400.com – Your public IBM I 7.5 server” ↗Huh. It was available on an hourly basis when I checked. There's a follow on book called Fortress Rochester: Inside the iSeries, that I had but gave away. It seems to be very expensive. My skill level is zero. :) I've read the book and know a bit about the system, but have never used one.
on “Below MI – IBM i for hackers” ↗Inside the AS/400 by Frank Soltis, is a deep dive into IBM's AS/400 and its predecessor the System/38. Quite interesting. There is a 2nd or 3rd edition called Fortress Rochester: Inside the iSeries, but it tends to be hard to find and expensive. [0] https://archive.org/details/insideas4000000solt/
on “The Soul of an Old Machine” ↗