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 Post subject: Raster Time
PostPosted: Thu Mar 30, 2017 4:52 am 
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Joined: Tue Feb 07, 2017 2:03 am
Posts: 248
How do you show frame raster time on a NES?


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 Post subject: Re: Raster Time
PostPosted: Thu Mar 30, 2017 5:46 am 
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Joined: Sun Sep 19, 2004 11:12 pm
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Location: NE Indiana, USA (NTSC)
Turn bit 0 of $2001 on (1) for 200-500 cycles, then turn it back off. This will make a gray stripe across the screen. To color the stripe, use one or more of bits 7, 6, and 5 of $2001.


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 Post subject: Re: Raster Time
PostPosted: Thu Mar 30, 2017 6:26 am 
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Or you can use any other mask bits of your choice, such as leftmost column background enable/disable.

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 Post subject: Re: Raster Time
PostPosted: Thu Mar 30, 2017 6:57 am 
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Joined: Tue Feb 07, 2017 2:03 am
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Nice, thanks.


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