IBM System/360 architecture

System/360
Designer	IBM
Bits	32-bit
Introduced	April 7, 1964
Design	CISC
Type	Register-Register; Register-Memory; Memory-Memory
Encoding	Variable (2, 4 or 6 bytes long)
Branching	Condition code, indexing, counting
Endianness	Big
Page size	N/A, except for 360/67
Open	Yes
Registers
General-purpose	16× 32-bit
Floating point	4× 64-bit

The IBM System/360 architecture is the model independent architecture for the entire S/360 line of mainframe computers, including but not limited to the instruction set architecture. The elements of the architecture are documented in the IBM System/360 Principles of Operation^[1]^[2] and the IBM System/360 I/O Interface Channel to Control Unit Original Equipment Manufacturers' Information manuals.^[3]

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[A22-6843-3] Cite error: The named reference A22-6843 was invoked but never defined (see the help page).

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