There is one in the 3830 control unit as well. This large box controlled the DASDs (disks) on early S/370s. I have one, and it still works.
-- Will On Mon, Jun 8, 2026 at 8:41 PM [email protected] steven--- via cctalk <[email protected]> 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.
