Subject: Re: [stella] 2P x 3 digit score routines? From: Thomas Jentzsch <tjentzsch@xxxxxx> Date: Mon, 16 May 2005 03:22:51 -0400 |
Fred Quimby wrote: > This looks interesting, but as it sits it looks like it would > require digits to be stored in RAM since it uses absolute indexed > addressing. Yup. But that shouldn't be any problem for Andrew. Though by now I don't think this code is very useful for him. > What's the purpose of the TXS/JSR in the middle of the kernel, is it > just to burn up cycles? Nope, that's the key trick. By letting the stack point to RESPx, a JSR triggers both RESPx very closely (1 cycle = 3 pixel) together. Else the minimum distance is 3 cycles (9 pixel). Have fun! Thomas _______________________________________________________ Thomas Jentzsch | *** Every bit is sacred ! *** tjentzsch at web dot de | Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://stella.biglist.com
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