Was the a drum-based CPC before the 305? -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר
________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Leonard D Woren <[email protected]> Sent: Friday, January 26, 2024 1:56 AM To: [email protected] Subject: Re: OT-ish: Very old IBM hardware & manuals available I'm pretty sure that the thing I saw was significantly older than 650. The bits were so big that they were using an oscilloscope to see them. I don't recall if they said what machine that drum connected to. I had gone there for some big deal event and it was very crowded. Anyway, it's worth checking with CHM for interest in any old but historically significant hardware. /Leonard Seymour J Metz wrote on 1/25/2024 5:55 AM: > I started on a 650, and that had a 2,000 word drum. The 305, before my time, > had a 2400 character drum. I'm not aware of any IBM drum smaller than that. > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > עַם יִשְׂרָאֵל חַי > נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר > > ________________________________________ > From: IBM Mainframe Discussion List <[email protected]> on behalf of > Leonard D Woren <[email protected]> > Sent: Thursday, January 25, 2024 12:37 AM > To: [email protected] > Subject: Re: OT-ish: Very old IBM hardware & manuals available > > Maybe contact the Computer History Museum https://computerhistory.org/ > . They probably have the resources to ship anything they're > interested in. > > Their collection includes IBM hardware that predates any of us having > seen a digital computer. It's been quite a while since I was there, > but they were working on fixing up an IBM drum storage device which I > think was the size of beer keg and held something like 550 bytes, no > typo, or maybe it was a few kbytes. > > /Leonard > > > Robert Prins wrote on 1/23/2024 7:57 AM: >> Hi all, >> >> My father worked for IBM in the Netherlands for more than 30 years, >> starting as a CE in the late 1950'ies. Last year he was diagnosed with >> Alzheimer, and over the past few months my siblings and me have been >> emptying his apartment and storage room, and we've come across a sizeable >> quantity of IBM "stuff", from manuals for the 650 to old square cm >> "integrated circuits" and even a magnetic core memory card. My siblings >> weren't in the least interested in any of it, so I took it, and although >> it's nice to look at, our house is already full enough as it is, so... >> >> If anyone thinks they can offer a good home to these things, and I will, >> hopefully soon, put pictures of everything that surfaces on my website, >> feel free to contact me off this list and we can take it from there. You'll >> most definitely be paying for shipping (from Lithuania), and based on what >> I'm going to find out on fleabay, I might ask for a bit more. >> >> Robert > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
