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Describes the Model 40 as a random access storage device with six magnetic discs and ten recording surfaces.
Details the Model 42 using two disc packs (resident and removable) and four recording surfaces per pack.
Outlines disc pack capacities, track/sector structure, and operational specifications for Models 40/42.
Identifies the three toggle switches and three indicator lights on the operator control panels.
Explains the purpose of each switch and indicator light on the operator control panel.
Details the characteristics of Read/Write instructions, including memory addressing and fields.
Explains the structure and components of the six-character disc address format.
Details the process of writing data to a sector, including error checking and condition codes.
Explains the process of reading data from a sector, including error handling and track verification.
Discusses how disc drives are managed when bound to partitions and how seeks are handled.
Summarizes key operational timings like rotation and arm positioning for disc drives.
Details timings for consecutive read/write operations and the impact of computational instructions.
Provides step-by-step instructions for mounting a Model 41 disc pack onto a Model 40 drive.
Provides step-by-step instructions for mounting a Model 41A disc pack onto a Model 42 drive.
Provides step-by-step instructions for mounting a Model 41B disc pack onto a Model 42 drive.
Details procedures for removing disc packs from Model 40 and 42 drives, including safety precautions.
Summarizes the various condition codes and their meanings for error reporting.
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