Quantity

You can code any of the following expressions after the keyword and equal sign:

A decimal number, or an expression that you have equated to a decimal number. For example:
```
TESTCB ACB=ACB1,ERROR=13,AM=VTAM
```
A register number, or the label of an EQU instruction for the register number, enclosed in parentheses. For example:
```
         L     5,TESTVAL
         TESTCB ACB=ACB1,ERROR=(5),AM=VTAM
         ⋮
TESTVAL  DS    F      TESTVAL SET DURING PROGRAM
*                     EXECUTION
```
Note: This form is prohibited if you are using the “simple” list form of the macroinstruction (MF=L).
An expression of the form (S,expr) where expr is any expression valid for an S-type address constant. This form is especially useful for gaining access to a control block field with a DSECT. For example, the program has already used GENCB to build an ACB in dynamically allocated storage, and has placed the address of the ACB in register 7. A temporary work area, MYACB, contains the information with which the contents of the ERROR field in the ACB pointed to by register 7 are compared. The DSECT ACBMAP is used to access the information in MYACB.
```
         LA    5,MYACB
         USING ACBMAP,5
         TESTCB ACB=(7),ERROR=(S,ERR1),AM=VTAM
         ⋮
MYACB    DS    XL108
ACBMAP   DSECT
         DS    XL49
ERR1     DS    X
         DS    XL58
         END
```
Note: This form is prohibited if you are using the “simple” list form of the macroinstruction (MF=L).
An expression of the form (*,expr) where expr is any expression valid for an S-type address constant. The address specified by expr is indirect; that is, it is the address of a fullword that contains the quantity for the operand. For example, the program has determined which ERROR value is tested and has primed register 5 with the appropriate displacement into ERRORLST:
```
         TESTCB ACB=ACB1,ERROR=(*,ERLST(5)),AM=VTAM
         ⋮
ERLST    EQU   *
BADNAME  DC    F'90'
BADPSWD  DC    F'152'
```