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 Post subject: Re: upernes
PostPosted: Mon Jul 17, 2017 3:56 pm 
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Joined: Sun May 27, 2012 8:43 pm
Posts: 1279
I'm not intricately familiar with the SNES's DMA, but msot DMA units will let you change the post-increment value. Does the SNES's DMA truly not allow this?


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 Post subject: Re: upernes
PostPosted: Mon Jul 17, 2017 4:10 pm 
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Location: NE Indiana, USA (NTSC)
VMAIN has three increment modes: one adding 1 for horizontal transfers, one adding 32 for columns of mode 0-6 nametables, and one adding 128 for columns of mode 7 nametables. Writing to VRAM uses whatever increment mode is set in VMAIN, regardless of whether it's through PIO or DMA.


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