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IBM 2050F Main Storage

Main storage in the F50 configuration, with 65 536 B available to programs and a 2.0 µs read/write cycle.

Manufacturer
IBM
Type
magnetic-core storage
Record status
approved

Figures

IBM 2050F Main Storage: recorded figures
Metric Value Evidence Basis Method Source
Memory capacity memory 65 536 B Confirmed Vendor-rated Design capacity Stated by the vendor
Memory cycle time memory 2.0 µs Confirmed Vendor-rated Nominal cycle time Stated by the vendorA main-storage read/write cycle; the shorter ROS and local-storage cycles are separate.

Derived comparisons

2 000 000 B/s

Formula
bytes per memory cycle ÷ memory cycle time memory-bandwidth-from-cycle-time v1
Inputs
  • ibm-2050f-main-storage Memory cycle time: 2.0 µs
Constants
  • bytes transferred by one main-storage cycle: 4 The Main Storage section states that each read/write cycle accesses four bytes. This is an exact transfer width, excluding parity bits.
Rounding
half-up , 2 significant digits

Divides bytes transferred by one main-storage cycle by the published memory cycle time. The result is an interface ceiling inferred from the transfer width and cycle time. It is not measured application throughput: refresh, contention and wait states can consume cycles. Reported to 2 significant digits. That is the precision of the cycle time, because the bytes-per-cycle constant is exact.

Fitted to

Editorial notes

This record describes the fitted main storage. Processor registers, microprogram storage, channel-control storage, and optional external core storage are outside its capacity.

Sources