VIM Q again
Ed Greshko
Ed.Greshko at greshko.com
Tue Jun 3 01:28:57 UTC 2008
Rick Stevens wrote:
> The Z80 had:
>
> JR idx(unconditional)
> JR Z,idx (jump relative if zero)
> JR NZ,idx (jump relative if non-zero)
> JR C,idx (jump relative if carry)
> JR NC,idx (jump relative if non-carry)
>
> And one of my favorites for loops:
>
> DJNZ idx (decrement and jump relative if non-zero)
>
> So, yes, the Z80 had conditional relative jumps. It also had that nice
> set of secondary registers...very handy for interrupt processing.
Oh, no! You've started my "flashback" processor running. I'm not going to
get any work done today. Please stop. :-) :-)
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