CDA CD 60 Dokumentacja Pobierz pdf (Strona 77)

PCI CD and PCI CDa

Document Number: 008-00965-06 EDT Public December 2004

Template: edt.dot

Page 77

Scatter-gather DMA Next Address Register

Size 32-bit

I/O read-write

Address 0x14

Access EDT_SG_NXT_ADDR

Comments The driver software writes this register as described in step 2 of the list in the

Performing DMA section on page 74.

Bit Description

A31–0 The starting address of the next DMA.

Scatter-gather DMA Current Count and Control Register

Size 32-bit

I/O read-only

Address 0x18

Access EDT_SG_CUR_CNT

Comments The driver software can read this register for debugging or to monitor DMA

progress.

Bit Description

A31–16 Read-only versions of bits 31–16 of the scatter-gather DMA next count and

control register.

D15–0 The number of words still to be transferred in the current DMA.

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 90 91

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CDA CD 60 Dokumentacja Strona 77