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
