z80:Opcodes:CALL

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Pushes the address after the CALL instruction (PC+3) onto the stack and jumps to the label. Can also take conditions.

Syntax

   call label			;unconditional call
   call cond.,label		;conditional call

Allowed Instructions

   call label		;always calls
   
   call c,label		;calls if C flag is set
   call nc,label		;calls if C flag is reset
   
   call z,label		;calls if Z flag is set
   call nz,label		;calls if Z flag is reset
   
   call m,label		;calls if S flag is set
   call p,label		;calls if S flag is reset
   
   call pe,label		;calls if P/V is set
   call po,label		;calls if P/V is reset

Effects

Flags are preserved.

Uses

The most common use of CALL is to create routines that can be used multiple times.

T-States

cc is condition: NZ, Z, NC, C, PO, PE, P, M

XX 17
condition true condition false
cc,XX 17 10

See Also

BIT,CP,CPD,CPDR,CPI,CPIR,DJNZ,JP,JR,RET