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- Newsgroups: alt.folklore.computers
- Path: sparky!uunet!stanford.edu!leland.Stanford.EDU!alderson
- From: alderson@elaine46.Stanford.EDU (Rich Alderson)
- Subject: Re: ASSEMBLY LANGUAGE IBM
- In-Reply-To: ALAN@VM1.McGill.CA (Alan Greenberg)
- Message-ID: <1992Nov23.174727.5880@leland.Stanford.EDU>
- Originator: alderson@leland.Stanford.EDU
- Sender: news@leland.Stanford.EDU (Mr News)
- Reply-To: alderson@elaine46.Stanford.EDU (Rich Alderson)
- Organization: Stanford University Academic Information Resources
- References: <BxtpIv.AMD@mentor.cc.purdue.edu> <STEVEV.92Nov17104240@miser.uoregon.edu> <1992Nov18.134855.28580@geovision.gvc.com> <1992Nov20.045846.18835@news.columbia.edu> <1992Nov20.214059.1@vxcrna.cern.ch> <1992Nov21.003148.16636@leland.Stanford.EDU> <168A69ADF.ALAN@VM1.McGill.CA>
- Date: Mon, 23 Nov 92 17:47:27 GMT
- Lines: 35
-
- In article <168A69ADF.ALAN@VM1.McGill.CA>, ALAN@VM1 (Alan Greenberg) writes:
- > Microcode is microcode, regardless of the technology used to store it!
-
- OK, I still think of microcode (on the old IBM iron) as the stuff *written on
- paper by engineers*, which was translated into hardware--not particularly easy
- to change hardware, at that.
-
- But you're right. Microcode is microcode.
-
- [Bunch of descriptive material on how it was stored on various 360s removed. I
- *said* my memory was hazy on the details...]
-
- >I seem to recall that the 370/145 (late 1960s?) was the first IBM machine to
- >use writable memory for microcode. The code was shipped on a brand new type
- >of media - an 8 inch flexible disk! All IBM disk units of that era had
- >numeric designations of 33nn (such as 3330, 3340, 3350). The drive to read
- >the flexible disk was appropriately enough called the 33FD. In the field, it
- >was quickly called a "floppy" disk instead of a "flexible" disk and the rest
- >is history.
-
- Summer, 1970. About the end of August or start of September. I had only just
- moved into a new apartment in Austin, Texas, and my _Principles of Operation_
- and the model-specific manuals had arrived that week, for all the 360s and the
- two new 370s (155 and 165) when the 145 was announced.
-
- I went to the local IBM offices, to see about getting the 145 manual. It was
- so new that they didn't have a price for it on their list yet, so they *gave*
- it to me.
-
- Some dates do stick. ;->
- --
- Rich Alderson 'I wish life was not so short,' he thought. 'Languages take
- such a time, and so do all the things one wants to know about.'
- --J. R. R. Tolkien,
- alderson@leland.stanford.edu _The Lost Road_
-