Subject: Re: [stella] Math riddle : Loading TIM64T with 43 burns only36scanlines (not 37) From: Chris Wilkson <ecwilkso@xxxxxxx> Date: Tue, 11 May 2004 09:57:00 -0400 (EDT) |
Yeah, this is correct. It counts down once per 6507 cycle. -Chris On Tue, 11 May 2004 mathys66@xxxxxxxxxx wrote: > i thought the timer counts always down (at least all my code relies on that, > and seems to work) ? > > quoting the data sheet: > "When the timer has counted thru 00000000 on the next count time an interrupt > will occur and the counter will read 11111111. After interrupt, the timer > register decrements at a divide by "1" rate of the system clock..." > > so what you have to take care of is that after the timer expired, it will > run at the osc's frequency, rather than at oscfreq/64. > > ??? > > cheers > thomas > > ---------------------------------------------------------------------------------------------- > Archives (includes files) at http://www.biglist.com/lists/stella/archives/ > Unsub & more at http://www.biglist.com/lists/stella/ > > ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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