See https://en.wikipedia.org/wiki/Amdahl_Corporation#Fujitsu_GS21 - Fujitsu machines are 31-bit, based on the technology they got when they bought Amdahl. I also STR that Fujitsu builds some of IBM's stuff, which doesn't mean anything much but is sorta interesting, maybe.
If you google "fujitsu osiv" you'll find a lot more than you likely want to know. ObAnecdote: back in the day (mid-80s) we had a plug-compatible mainframe, a Formation 4000, on which we ran our small (~30-person) software company, VM Systems Group, including sales support systems, development, and, well, just about everything; I think when I started there was maybe one PC in the office. Our Formation was the high-end, an (approximately) 0.25MIPS attached processor machine with a whopping 4MB! It was.not fast. And had occasional fun problems, like the time that a previously unnoticed poor solder on a board somehow decided to matter after an IML (perhaps because the IML was most likely caused after the room was shut down because the A/C failed and it had gotten very hot-so maybe the solder joint flowed a bit?) and the 64K memory chips were misdetected as 16K chips. The machine was kind of unhappy that it couldn't find the other 3MB. We replaced that box with one of the first 9370s, upgrading to 0.5MIPS (though uniprocessor) and 16MB. Now that was livin' large! ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
