Re: A86: a question
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Re: A86: a question
>Could someone please explain what "T states" mean
>in relation to Z80 processor speed? I looked it
>up in the Z80 reference book from Zilog, but it
>didn't explain it.
T states is short for time states. I don't know exactly how long a T
state is, but you don't really need to. Think of it more as a ratio of
time...
ie: ex de,hl ;4 T states
add ix,de ;15 T states
the ratio exDE,hl:addIX,de is
4:15 or 1 to 3.75
When determining the most time efficient routine, you don't need to
consider the actual time, only the ratio of time states (both ratios are
equivalent). About the only time you might need to consider actual time
is if you were writing a clock program, or timer in a game, etc...
>Lastly, the R (dynamic memory refresh)...
>Is this why..."random" numbers?
I believe that is correct.
Sincerely,
The Unibomer
Jared Ivey
Unibomer@Juno.com
http://www.geocities.com/SiliconValley/Vista/7342
"Bill my Friend, something very strange is a foot at the Circle K." --
Bill and Ted's Excellent Adventure
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