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

Store Accumulator (PST)0 5 8 15Op code1 1 0 1 0I 1XRXX 1Displacement1 11111D 0-7 X XThe contents of the accumulator replace the contents of the storage location specifiedby the effective address. The contents of the accumulator are not changed.An R field of 000 means that the effective address is formed using the IAR as a baseregister; a nonzero R field (R=001 to 111) indicates that an index register is used togenerate the EA.The carry and overflow indicators are not changed. The result indicators are changedto reflect the final contents of the storage location.Example:0Before PST operationAccumulatorAddressed storage location0 15 0 150 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 X X X X X XX X X X X X X X X X1 1 1 1 1 1 1 I 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1 1 1 1 10 0 F F•••■■•■,,•••■■, .••■••••■,,■••■■ ••■•■,.....•■••X X X X0After PST operationAccumulatorAddressed storage location0 15 0 150 0 0 00 0 0 0 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 11 1 1 I i 1 1 1 1 I 1 1 1 1 1 i I I 1 1 1 I 1 1 1 I 1 1 10 0 F 0 0 F FUnchanged by operationWill I I lippmpprip mg, 11111101II 1111111 RR IINIIIIINI,1111•1111111!1,111111111111!111