> On 06/09/2026 11:37 AM AEST Jon Elson via cctalk <[email protected]> > wrote: > On 6/8/26 19:41, [email protected] steven--- via cctalk wrote: > >> On 06/09/2026 9:30 AM AEST Murray McCullough via cctalk > >> <[email protected]> wrote: > >> 54 years ago the 8 inch floppy came into existence. It can be said it > >> helped to make micr-computing possible. > >> Happy computing. > >> > >> Murray 🙂 > > The IBM System 370/145 announced September 1970 and shipping June 1971 had > > a 23FD drive for microcode loading, IIR it was on the front panel at the > > top left or maybe in the CE area inside on the side, not sure exactly now. > > When I was doing work experience at IBM at the end of high school there was > > a Model 145 in a warehouse waiting to be scrapped and I recall looking at > > the 23FD in it then. > > It was in kind of a credenza under the console typewriter. > The 370/15x and 370/16x also used a similar drive for microcode and > diagnostics. I think they used solenoids for head stepping, pretty noisy. > Jon
That's a bit puzzling as the 23FD I saw was not under the console, it was definitely on the main panel at the top left. So I did a little searching and the 155 was not what I saw either. Finally I found this: https://drivearchive.co.uk/drivelarchive/blog/_archives/2007/3/19/2817813.html The 370/135 was what I saw in the warehouse, not the 145.
