Control Data Corporation CDC 790ICEM Owner's Manual page 13

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11) Is there a flexible disk already in the flexible-disk drive?
(Flexible disks are sometimes called "floppys," or
"diskettes," or sometimes just "disks.") If you can't tell
by looking or if you can see there is a flexible disk in the
drive, press the Disk Eject switch. If a disk is in the
drive, the disk will pop part way out so you can remove it.
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12) When you look at a flexible disk, what you actually see is
the case covering the flexible disk. Inside the case, there
really is a disk of material upon which information (text,
numbers, programs, etc.) can be magnetically recorded. The
disk drive rotates the disk within~the case and also writes
information on or reads information from the disk.
The flexible disks received with the workstation have
microcode written (recorded) on them. Microcode is a short,
permanently recorded, computer program. Because microcode is
written on each of the flexible disks, from here on the
flexible disks will be called microcode disks, or simply,
disks.
62950150 1-7
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