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IBM 5280 Distributed Data System - Index of

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Binary Register Load from a Base Displacement Address (=)Source:BRaI IIia~~IObject: B8 @(0 8I31DD DD IIo Result/factor 1: The address <strong>of</strong> the binary register that contains factor 1and will contain the result <strong>of</strong> this instruction.fJ Bit 15:o = Length <strong>of</strong> factor 2 is 21 = Length <strong>of</strong> factor 2 is 1 .II Base address register: The address <strong>of</strong> the binary register that contains thebase address.a Address bit:0= BRa contains a 16-bit address.1 = BRa(4) contains a 20-bit address <strong>of</strong> a storage location outside thepartition.II Factor 2 displacement: The number <strong>of</strong> bytes (hex OO-FF) from the baseaddress where factor 2 is stored.The factor displacement is added to the base address register contents, and factor 2is loaded from that address to the specified binary register.Object Code Instruction Format 265

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