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參數(shù)資料
| 型號： | DM9008F |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | ISA/Plug & Play Super Ethernet Contoller |
| 中文描述： | 的ISA /插頭 |
| 文件頁數(shù)： | 25/68頁 |
| 文件大?。?/td> | 403K |
| 代理商： | DM9008F |
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DM9008
ISA/Plug & Play Super Ethernet Contoller
Final
Version :DM9008-DS-F02
June 14, 2000
25
Current Page Register (CURR)
This register is used internally by the Buffer Management
Logic as a backup register for reception. CURR contains the
address of the first buffer to be used for a packet reception,
and is used to restore DMA pointers in the event of receive
errors. This register is initialized to the same value as
PSTART, and should not be written to again unless the
controller is reset.
7
6
5
4
3
2
1
0
CURR
A15
A14
A13
A12
A11
A10
A9
A8
Current Local DMA Register 0, 1 (CLDA0, 1)
These two registers can be accessed to determine the current
Local DMA Address.
7
6
5
4
3
2
1
0
CLDA
1
A15
A14
A13
A12
A11
A10
A9
A8
7
6
5
4
3
2
1
0
CLDA
0
A7
A6
A5
A4
A3
A2
A1
A0
(iii) Remote DMA Registers
Remote Start Address Registers (RSAR0, 1)
Remote Byte Count Registers (RBCR0, 1)
Remote DMA operations are programmed via the Remote
Start Address (RSAR0, 1) and Remote Byte Count registers
(RBCR0, 1). The Remote Start Address is used to point to the
start of the block of data to be transferred. The Remote Byte
Count is used to indicate the length of the block (in bytes).
7
6
5
4
3
2
1
0
RSAR1
A15
A14
A13
A12
A11
A10
A9
A8
7
6
5
4
3
2
1
0
RSAR0
A7
A6
A5
A4
A3
A2
A1
A0
7
6
5
4
3
2
1
0
RBCR1
BC15
BC14
BC13
BC12
BC11
BC10
BC9
BC8
3
7
6
5
4
3
2
1
0
RBCR0
BC7
BC6
BC5
BC4
BC3
BC2
BC1
BC0
Current Remote DMA Address Registers (CRDA0, 1)
The Current Remote DMA Registers contain the current
address of the Remote DMA. The bit assignments are
shown below:
7
6
5
4
3
2
1
0
CRDA1
A15
A14
A13
A12
A11
A10
A9
A8
7
6
5
4
3
2
1
0
CRDA0
A7
A6
A5
A4
A3
A2
A1
A0
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