DM9008 Ver la hoja de datos (PDF) - Davicom Semiconductor, Inc.

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DM9008

ISA/Plug & Play Super Ethernet Contoller

Davicom Semiconductor, Inc. 

Logical Device Control Registers

Index

Name

30H

Activate

Type

R/W

31H

I/O Range Check

R/W

Logical Device Configuration Registers

Memory Configuration Registers

Index

Name

Type

40H

BROM base address

R/W

bits[23:16]

41H

BROM base address

R/W

bits[15:0]

42H

Memory Control

R

I/O Configuration Registers

Index

Name

60H

I/O base address

bits[15:8]

Type

R/W

61H

I/O base address

R/W

bits[7:0]

DM9008

ISA/Plug & Play Super Ethernet Contoller

Definition

For each logical device, there is one Activate register that

controls whether or not the device is active on the ISA bus.

Bit[0], if set, activates the logical device. Before a logical

device is activated, I/O range check must be disabled

This register is used to perform a conflict check on the I/O

port range programmed for use by a logical device

Bit[1] - This bit, when set, enables I/O range check

I/O range check is only valid when the logical device is

inactive

Bit[0] - If set, this bit forces logical device to respond to I/O

reads within logical device's assigned I/O range with

a55H when I/O range check is in operation. If clear, the

logical device drives AAH

Definition

Bits[23:20] and bit[17] are read only when their values = 0.

All other bits are read/write bits

Bits[13:8] are read only when their values = 0.

All other bits are read/write bits

00H (Only 8-bit operation is supported for BROM)

Definition

Bits[15:10] are read-only with undetermined values. Bit[9] is

read only, and is always 1.

All other bits are read/write bits

Bits[4:0] are read only when their values = 0.

All other bits are read/write bits

28

Final

Version: DM9008-DS-F02

November 30, 2000

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