z80:Opcodes:RES

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Resets the specified byte to zero.

Syntax

   res n,op8

Allowed Instructions

   res n,a
   res n,b
   res n,c
   res n,d
   res n,e
   res n,h
   res n,l
   res n,(hl)
   res n,(ix+n)
   res n,(iy+n)

Effects

Flags are preserved.

Uses

T-States

r denotes 8-bit register.

r 8
(hl) 15
(ix+X) 23
(iy+X) 23

See Also

AND,BIT,CCF,CPL,OR,SCF,SET,XOR