IBM 7090 User Manual

Explains how a computer system performs operations and processes problems using programs.

Details the five basic functional parts of a computer system: input, storage, arithmetic, control, and output.

Explains the general logic of the 7090 system, comparing it to accounting operations.

Describes how words are designated in the 7090 system's storage, including addresses.

Details the format and types of words (numeric, instruction, command) used in the 7090 system.

Explains the 7090 operation for solving A+B=C, including information flow and control.

Mentions additional components, instructions, and commands for the 7090 system.

Describes the basic registers and switching units of the 7100 CPU.

Explains the primary and secondary operation decoders used in instruction processing.

Describes the functional units of the multiplexor, including clock and bus.

Explains the multiplexor storage bus OR'ing circuits for routing data to core storage.

Explains data flow from the CPU to core storage via the multiplexor.

Describes the I cycle operation common to most instructions.

Explains indirect addressing as a programming device to change instruction addresses.

Introduces the operator's panel for visual checking and manual control of the system.

Describes the incandescent indicators on the CE test panel and their meanings.

Details the double-throw toggle switches and receptacles on the CE panel.

Describes the adders as transistor switching circuits for binary sum operations.

Explains the address register as a 15-position trigger register for signaling addresses.

Describes the program register for decoding instructions during I time.

Details the sense indicator register as a 36-position trigger register with two triggers per position.

Lists operation codes and their corresponding instructions and page numbers.