IBM System/7 Functional Characteristics - All about the IBM 1130 ...

Load Index Long (PLXL)0 5 8 11 16 31Op code R1 R2 ZerosAddress10001 XXX XXX 00000Ili I i i II IIII !till IIIIIIIIII`..va•••■•••■■•■• ••■••■■•■• •••••••■••■•8 8-F X 0 X X X XThe contents of the storage location specified by the effective address replace thecontents of the register specified by the RI field. R1 =000 specifies the accumulator;R1=001 to 111 specifies an index register. The storage contents are not changed.If R2=000, the address field contains the effective address. If R2=001 to 111, theeffective address is the algebraic sum of the contents of the index register (specifiedby R2) and the address field.Bits 11 to 15 of the instruction must be O's.The carry and overflow indicators are not changed. The result indicators are changedto reflect the final contents of the accumulator or index register specified by R1.Example:0 5 8 11 16 31Op code R1 R2 Zeros Address1 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 111111 i t II 1111 _MI! 11111111118 F 0 0 0 0 0Since R2 = 000, the data is in storage location 15 (value of address field)0 Before PLXL operationStorage location 150Index register 715 0 150 1 1 0 1 1 1 1 0 0 0 0 1 1 1 11111111111111116 F 0°After PLXL operationStorage location 150Index register 715 0 150 1 1 0 1 1 1 1 0 0 0 0 1 1 1 11111 I 111111111116 F 0Unchanged by operation0 1 1 0 1 1 1 1 0 0 0 0 1 1 1 1IIIIIIIIIIIIIII6 F 0Processor Instructions 4-11