CDA CD 60 Dokumentacja Pobierz pdf (Strona 76)

PCI CD and PCI CDa

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

Template: edt.dot

Page 76

Main DMA Next Count and Control Register

Size 32-bit

I/O read-only

Address 0x0C

Access EDT_DMA_NXT_CNT

Comments The scatter-gather DMA fills this register when required from the scatter-

gather DMA list.

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.

Scatter-gather DMA Current Address Register

Size 32-bit

I/O read-only

Address 0x10

Access EDT_SG_CUR_ADDR

Comments Automatically copied from the scatter-gather DMA next address register

when that register is valid and the current scatter-gather DMA completes.

Bit Description

A31–0 The address of the current DMA or the last used address if no DMA is currently

active.

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 90 91

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CDA CD 60 Dokumentacja Strona 76