ASYNC_SETENHANCEDMODEPARMS (54h) - Enhanced Flags1

Enhanced Flags1

Has the following settings (see Note 1 for more information):

Bit 0

Enhanced mode supported by hardware. (Query only for Function 74h.)
Bit 1
Enable the enhanced mode (default)
Bits 2-3
DMA Receive Operation request. Has the following:

Bit 3

Bit 2 Description
0
0 Disable DMA Receive Capability
0
1 Enable DMA Receive Capability (default)
1
0 Dedicate a DMA channel to Receive operation
1
1 Reserved
Bits 4-5
DMA Transmit operation request. Has the following:

Bit 5

Bit 4 Description
0
0 Disable DMA Transmit Capability
0
1 Enable DMA Transmit Capability (default)
1
0 Dedicate a DMA channel to Transmit operation
1
1 Reserved
Bit 6
Receive operation in DMA mode. (Query only for Function 74h.)
Bit 7
Transmit operation in DMA mode. (Query only for Function 74h.)

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