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x68000:dmac [2017/09/11 10:49]
neko68k added CPR, DFC, BFC, and GCR registers
x68000:dmac [2017/09/11 10:53] (current)
neko68k forgot register names for the last 4
Line 192: Line 192:
 --- ---
  
-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:
 --- ---
  
-DFC<​BOOKMARK:​DFC>​ - (+0x31)+DFC<​BOOKMARK:​DFC>​ - Device Function Code (+0x31)
 Same as MFC. Same as MFC.
  
 --- ---
  
-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.txt ยท Last modified: 2017/09/11 10:53 by neko68k
 
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