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IBM Technical Newsletter No. 11, A complete floating-decimal interpretative system for the IBM 650 magnetic drum Calculator. Applied Science Division IBM, V. M. Wolontis.

IBM Technical Newsletter No. 11, A complete floating-decimal interpretative system for the IBM 650 magnetic drum Calculator.

IBM 1956, 63 + xxi pages, diagrams, tables; 8.x5x11, stapled wraps, stiff cardstock covers, dark blue with white bars.
Condition: Very Good, some scuffing and chipping to rear cover, edgewear at spine ends and corners; the binding is tight, pages are clean & unmarked.
Price: $35.00
Item no. R388
Item Description
This report describes an interpretive system which transforms the 650 into a three-address, floating-decimal, general-purpose computer, primarily suited for scientific and engineering calculations...(It) serves a dual purpose. It presents the external characteristics of the interpretive system to the potential user by means of detailed explanations accompanied by illustrative exmples... It also describes the internal structure of the system to the professional designer of such systems... (from the Abstract)

Contents include -- Introduction, general design considerations, changes and additions; General INformation - The 650; the interpretive system, storage, data and instruction form; Mathematical Operations; Logical Operations; Input-output operations - card form; punching; loading, reading; Program Testing -- memory print-out; tracing; console testing; Summary of Operation Codes; Stops; Execution Times; Special Topics in Programming -- subroutines, translation; unnormalized input, transition between floating and fixed decimal form; Internal Structure of the System - detailed design considerations; realted systems; numerical methods; Control Panel Wiring for the Read-punch unit; Control Panel WIring for the Tabulator; System loading; Programs; .