x68000:dmac
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revision | Last revisionBoth sides next revision | ||
x68000:dmac [2017/09/11 10:49] – added CPR, DFC, BFC, and GCR registers neko68k | x68000:dmac [2017/09/11 10:53] – forgot register names for the last 4 neko68k | ||
---|---|---|---|
Line 192: | Line 192: | ||
--- | --- | ||
- | CPR< | + | CPR< |
^ 7 ^ 6 ^ 5 ^ 4 ^ 3 ^ 2 ^ 1 ^ 0 ^ | ^ 7 ^ 6 ^ 5 ^ 4 ^ 3 ^ 2 ^ 1 ^ 0 ^ | ||
Line 203: | Line 203: | ||
--- | --- | ||
- | DFC< | + | DFC< |
Same as MFC. | Same as MFC. | ||
--- | --- | ||
- | BFC< | + | BFC< |
Same as MFC. | Same as MFC. | ||
--- | --- | ||
- | GCR< | + | GCR< |
^ 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| | ||
+ | |||
+ | |||
+ | |||
+ |
x68000/dmac.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1