Accessing Main Storage: CORE › Change the Contents of Main Storage › Bit Manipulation

Bit Manipulation

Appending OC, NC, or XC after the data string lets you perform one of the following logical operations to the contents of main storage:

• OC to OR the data in the command to storage
• NC to AND the data in the command to storage
• XC to EXCLUSIVE OR the data in the command to storage

Examples

The following examples demonstrate how to manipulate main storage bits.

• To set the high order bit of the first byte on the current CORE display to 1, enter:

  CORE=CHGX'80'OC
  

• To set the high order bit of the first byte on the current CORE display to 0, enter:

  CORE=CHGX'7F'NC
  

• To reverse all the bits of the first byte on the current CORE display, enter:

  CORE=CHGX'FF'XC