DISABLE

Abbreviation	None.
Arguments	None.
Default	None.
Description	The DISABLE directive instructs the compiler to generate code that disables all interrupts for the duration of a function. DISABLE must be specified with a #pragma directive immediately before a function declaration. The DISABLE control applies to one function only and must be re-specified for each new function.

NOTES
DISABLE may be specified using the #pragma directive only.

DISABLE can be specified more than once in a source file and must be specified once for each function that is to execute with interrupts disabled.

A function with disabled interrupts cannot return a bit value to the caller.

Example

The following example is a source and code listing of a function using the DISABLE directive. Note that the EA special function register is cleared at the beginning of the function (JBC EA,?C0002) and restored at the end (MOV EA,C).

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stmt level    source
   1          typedef unsigned char  uchar;
   2          
   3          #pragma disable      /* Disable Interrupts */
   4          uchar dfunc (uchar p1, uchar p2)  {
   5   1        return (p1 * p2 + p2 * p1);
   6   1      }

	; FUNCTION _dfunc (BEGIN)
0000 D3		SETB	C
0001 10AF01		JBC	EA,?C0002
0004 C3		CLR	C
0005	?C0002:
0005 C0D0		PUSH    PSW
;---- Variable 'p1' assigned to register 'R7' ----
;---- Variable 'p2' assigned to register 'R5' ----
				; SOURCE LINE # 4
				; SOURCE LINE # 5
0007 ED		MOV	A,R5
0008 8FF0		MOV	B,R7
000A A4		MUL	AB
000B 25E0		ADD	A,ACC
000D FF		MOV	R7,A
				; SOURCE LINE # 6
000E	?C0001:
000E D0D0		POP	PSW
0010 92AF		MOV	EA,C
0012 22		RET
	; FUNCTION _dfunc (END)
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