Store Accumulator
Organizational graphic tag to help group instructions

Mnemonic

 STO

Short and Long format of instruction



Description

The contents of the accumulator replace the contents of the addressed core-storage location. Contents of the accumulator are unchanged by the operation.

Before and after operation illustration

There are no addressing exceptions for the load accumulator instruction; all forms of addressing that are described under "Effective-Address Generation" apply to the STO instruction.


Indicators: The carry and overflow indicators are not affected during the STO operation.



Examples



Store Accumulator

Assembler Language Coding Hexadecimal Value Description of Instruction
Label   Operation   F T    
21 25
 
27 30
  32 33   35..40..
    STO         DISP D0XX Contents of A are stored in CSL at EA (I + DISP)
    STO     1   DISP D1XX Contents of A are stored in CSL at EA (XR1 + DISP)
    STO     2   DISP D2XX Contents of A are stored in CSL at EA (XR2 + DISP)
    STO     3   DISP D3XX Contents of A are stored in CSL at EA (XR3 + DISP)
    STO   L     ADDR D400XXXX Contents of A are stored in CSL at EA (Addr)
    STO   L 1   ADDR D500XXXX Contents of A are stored in CSL at EA (Addr + XR1)
    STO   L 2   ADDR D600XXXX Contents of A are stored in CSL at EA (Addr + XR2)
    STO   L 3   ADDR D700XXXX Contents of A are stored in CSL at EA (addr + XR3)
    STO   I     ADDR D480XXXX Contents of A are stored in CSL at EA (V in CSL at Addr)
    STO   I 1   ADDR D580XXXX Contents of A are stored in CSL at EA (V in CSL at "Addr + XR1")
    STO   I 2   ADDR D680XXXX Contents of A are stored in CSL at EA (V in CSL at "Addr + XR2")
    STO   I 3   ADDR D780XXXX Contents of A are stored in CSL at EA (V in CSL at "Addr + XR3")


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