NFG Games + GameSX

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x68000:dmac

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x68000:dmac [2017/09/11 10:09] – [Register Descriptions] neko68kx68000:dmac [2017/09/11 10:17] – added SCR register neko68k
Line 20: Line 20:
 |+0x04|1.b|R/W|[[dmac#dcr|DCR]] - Device Control Register| |+0x04|1.b|R/W|[[dmac#dcr|DCR]] - Device Control Register|
 |+0x05|1.b|R/W|[[dmac#ocr|OCR]] - Operation Control Register| |+0x05|1.b|R/W|[[dmac#ocr|OCR]] - Operation Control Register|
-|+0x06|1.b|R/W|SCR - Sequence Control Register|+|+0x06|1.b|R/W|[[dmac#scr|SCR]] - Sequence Control Register|
 |+0x07|1.b|R/W|CCR - Channel Control Register| |+0x07|1.b|R/W|CCR - Channel Control Register|
 |+0x08|1.w| |---| |+0x08|1.w| |---|
Line 116: Line 116:
  
 Note: Channel #0, #1, and #3 should be used with external transfer request. Note: Channel #0, #1, and #3 should be used with external transfer request.
 +
 +---
 +
 +SCR<BOOKMARK:scr> - Sequence Control Register (+0x06)
 +
 +^  7  ^  6  ^  5  ^  4  ^  3  ^  2  ^  1  ^  0  ^
 +|0||||MAC||DAC||
 +
 +^Bits^Description^
 +|  7~4  |0|
 +|  3~2  |MAC - Memory address count \\ %00: Do not change memory address register \\ %01: Increment memory address register each time transfer is done \\ %10: Decrement memory address register each time transfer is done \\ %11: Unused|
 +|  1~0  |DAC - Device address count \\ %00: Do not change device address register \\ %01: Increment device address register each time transfer is done \\ %10: Decrement device address register each time transfer is done \\ %11: Unused|
x68000/dmac.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1