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x68000:dmac [2017/09/11 10:49] – added CPR, DFC, BFC, and GCR registers neko68kx68000:dmac [2019/08/27 20:45] (current) – external edit 127.0.0.1
Line 192: Line 192:
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-CPR<BOOKMARK:cpr> - (+0x2D)+CPR<BOOKMARK:cpr>Channel Priority Register (+0x2D)
  
 ^  7  ^  6  ^  5  ^  4  ^  3  ^  2  ^  1  ^  0  ^ ^  7  ^  6  ^  5  ^  4  ^  3  ^  2  ^  1  ^  0  ^
Line 203: Line 203:
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-DFC<BOOKMARK:DFC> - (+0x31)+DFC<BOOKMARK:DFC>Device Function Code (+0x31)
 Same as MFC. Same as MFC.
  
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-BFC<BOOKMARK:BFC> - (+0x39)+BFC<BOOKMARK:BFC>Base Function Code (+0x39)
 Same as MFC. Same as MFC.
  
 --- ---
  
-GCR<BOOKMARK:GCR> - (+0x3F)+GCR<BOOKMARK:GCR>General Control Register (+0x3F)
  
 ^  7  ^  6  ^  5  ^  4  ^  3  ^  2  ^  1  ^  0  ^ ^  7  ^  6  ^  5  ^  4  ^  3  ^  2  ^  1  ^  0  ^
Line 222: Line 222:
 |  3~2  |BT - Burst time \\ Number of DMA clock cycles per burst. \\ %00: 16 clocks \\ %01: 32 clocks \\ %10: 64 clocks \\ %11: 129 clocks| |  3~2  |BT - Burst time \\ Number of DMA clock cycles per burst. \\ %00: 16 clocks \\ %01: 32 clocks \\ %10: 64 clocks \\ %11: 129 clocks|
 |  1~0  |BR - Bandwidth threshold (band occupancy) \\ %00: 50% \\ %01: 25% \\ %10: 12.5%  \\ %11: 6.25% \\ Note: Only affects channels set to limited speed auto request mode| |  1~0  |BR - Bandwidth threshold (band occupancy) \\ %00: 50% \\ %01: 25% \\ %10: 12.5%  \\ %11: 6.25% \\ Note: Only affects channels set to limited speed auto request mode|
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x68000/dmac.1505090994.txt.gz · Last modified: 2019/08/27 20:44 (external edit)