Motorola MVME2600 Series User Manual Page 108

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DMA - Block of Memory Move
3-40
3
DMA - Block of Memory Move
Note This command works for MVME160x series modules
only.
Command Input
DMA RANGE ADDR VDIR AM BLK [
;B|H|W]
Arguments
VDIR Direction of the transfer.
0 means the transfer occurs from the local bus to the VMEbus; 1
means the transfer occurs from the VMEbus to the local bus.
AM VMEbus address modiÞer of the transfer.
Refer to the VMEbus speciÞcation for the complete list of address
modiÞers. The VMEbus transfer address must also support
transfers with the selected address modiÞer. Refer to the
applicable board installation and use manual.
BLK Block transfer mode, which can be one of the following:
0 Block transfers disabled.
1 The DMA controller executes D32 block transfer cycles on
the VMEbus. In the block transfer mode, the DMA
controller may execute byte and two-byte cycles at the
beginning and ending of a transfer in non-block transfer
mode.
2 Block transfers disabled.
3 The DMA controller executes D64 block transfer cycles on
the VMEbus. In the block transfer mode, the DMA
controller may execute byte, two-byte, and four-byte
cycles at the beginning and ending of a transfer in non-
block transfer mode.
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