Subject: RE: [stella] Math riddle : Loading TIM64T with 43 burns only 36scanlines (not 37) From: Chris Wilkson <ecwilkso@xxxxxxx> Date: Mon, 10 May 2004 23:08:06 -0400 (EDT) |
Duh. I'm buying into the hype I guess. I should read my own VCS memory map. Then I'd know. :/ I should also know better than to trust my memory. Bleh. I'm sure glad the Stella List exists. It's really good at catching all of my goofs. :P Thanks!! -Chris On Mon, 10 May 2004, Dennis Debro wrote: > Hi there, > > > Of course in the 2600, there are no interrupts. So you have to check when > > the count is 255. > > You can use the interrupt to determine when the timer is done. It's done in > some games. One in particular is Moonsweeper (since I'm transcribing it > now). IIRC Bob also does this in Dragonfire. > > Bob sets the timer and then does... > > VBOUT BIT TIMOUT ; WAIT FOR VB OVER > BPL VBOUT > > to determine when the timer is done. TIMOUT is register $285. > > Take care, > Dennis > > > ---------------------------------------------------------------------------------------------- > 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/
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
RE: [stella] Math riddle : Loading , Dennis Debro | Thread | Re: [stella] Math riddle : Loading , Eric Ball |
RE: [stella] Math riddle : Loading , Dennis Debro | Date | Re: [stella] Math riddle : Loading , mathys66 |
Month |