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Registers PCI CD/CDa Configurable DMA Interface User’s Guide

22 EDT, Inc. May 2007

Main DMA Current Count and Control Register

Size 32-bit

I/O read-only

Address 0x08

Access EDT_DMA_CUR_CNT

Comment This register is automatically copied from the main DMA next count and control

Main DMA Next Count and Control Register

Size 32-bit

I/O read-only

Address 0x0C

Access EDT_DMA_NXT_CNT

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

DMA list.

Scatter-gather DMA Current Address Register

Size 32-bit

I/O read-only

Address 0x10

Access EDT_SG_CUR_ADDR

Comment This register is automatically copied from the scatter-gather DMA next address

Bit Description

31-16 Read-only versions of bits 31–16 of the Scatter-gather DMA current count and control register.

15–0 The number of words still to be transferred in the current DMA.

Bit Description

31-16 Read-only versions of bits 31–16 of the Scatter-gather DMA next count and control register.

15–0 The number of words still to be transferred in the current DMA.

Bit Description

31–0 The address of the current DMA, or the last used address if no DMA is currently active.

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CDA CD 60 Betriebsanweisung Seite 26