Development Tools

.EQU

Defines a name having an absolute-expression or relative-expression value.

[Syntax]

[Function]

Defines a name having an absolute-expression or relative-expression value specified by the operand field.

[Use]

-	You can use this directive to define names for numerical data that can be used instead of the actual numbers in the operands of machine-language instructions and directives in source code.

-	We recommend defining frequently used numerical values as names. Even if a given value in the source program is to be changed, you will only need to change the value corresponding to the name.

[Description]

-	The SET directive may be described anywhere in a source program.

-	Symbols that have already been defined by using .EQU cannot be redefined.

-	The name generated by the .EQU directive can be externally defined by the .PUBLIC directive.

-	If the name is externally defined by the .PUBLIC directive, a symbol defined in any other module cannot be specified as the operand.

-	The following values can be specified as the operand.

-	Absolute expression

The absolute expression should be in accordance with "(a) Absolute expression".

-	Relative expression

The relative expression should be in accordance with "(b) Relative expressions".

PSW

When PSW is specified, the value is 0xFFFFA.

An illegal operand will cause an error.

-	A value between 0x00000000 and 0xFFFFFFFF can be specified as the operand, and a value between 0 and 7 can be specified as the bit position.

[Example]

To specify a constant expression.

SYM1    .EQU    10

        MOV     A, #SYM1

To specify a symbol.

SYM2    .EQU    0xFFE20

BSYM1   .EQU    SYM2.1

        SET1    BSYM1

To specify PSW.

SYM3    .EQU    PSW

        MOV     SYM3, #10

To specify a SFR symbol.

SYM4    .EQU    P0

        MOV     SYM4, #2