Accessing Main Storage: CORE › Display Main Storage › Elements of a CORE Command

Elements of a CORE Command

An element of a CORE command is the minimum amount of symbols and text sufficient to instruct CA InterTest for CICS to perform a specific CORE function. Each CORE command must contain one complete element, although it can contain more than one. A CORE command element begins with any one of the following symbols:

• Equal Sign (=) indicates that an absolute address (entered in hexadecimal), a symbolic address, or a CORE command function follows.
• Plus Sign (+) adds the number of bytes specified after it to the address in the storage pointer. This advances the storage pointer forward.
• Minus Sign (‑) subtracts the number of bytes specified after it from the address in the storage pointer. This moves the storage pointer backward.

  Note: The plus and minus signs must be followed by a displacement, specified symbolically, or as a number, a multiplication, or a division.

• At Sign (@) works like the plus sign. However, after the address is advanced, it obtains the next address from the three right‑most bytes of the four bytes found at the current address. The result is indirect addressing. The at sign uses the lower 24 bits for addressing.
• Percent Sign (%) works like the at sign, except it uses 31 bit (XA) addressing. It obtains the address from the four bytes of the fullword.

  Note: The at and percent signs must be followed by a displacement specified symbolically, or as a number, a multiplication, a division, or an absolute or symbolic address.

• Comma (,) indicates that the following text is a further description of the previous element and not the beginning of a new element.

There are many elements available to you that are described later in this chapter. In addition, create new elements that apply only to your site.

Note: The Installation Guide provides instructions for defining new elements by coding CORUCOM macros.