Re: A83: Re: Where is everybody?
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Re: A83: Re: Where is everybody?
how do YOU figure that one?
A bit x,reg takes only 8 clocks.
A bit x,(HL) takes 12.
just a ld a,(HL) takes 7, and then a shift takes 8. if you want to test like bit
4, you have to shift 4 times.
//Olle
David Phillips wrote:
>
> How do you figure that one? It is many times more efficient to load the
> value into the accumulator, shift and test the carry flag, such as when
> reading keys using the ports.
>
> > BTW, The best way to test a bit is to use the bit command.
> >
> > syntax:
> > bit x,Reg (x=bit,Reg=register) [I think!]
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