DM9008F View Datasheet(PDF) - Davicom Semiconductor, Inc.
Part Name
Description
MFG CO.
'DM9008F' PDF : 68 Pages View PDF
Functional Description
DM9008
ISA/Plug & Play Super Ethernet Contoller
Plug and Play (PnP) Module
Auto-configuration Ports
Three 8-bit I/O ports are defined for the PnP read/write operations. They are called "Auto-configuration ports", and are listed below.
Port Name
ADDRESS
WRITE DATA
READ DATA
Type
W
W
R
Location
279H (Printer status port)
A79H (Printer status prot + 800H)
Relocatable in range 203H to 3FFH
The Plug and Play registers are accessed by first writing the
address of the desired register, which is called the "Register
Index". This can be followed by any number of WRITE_DATA
or READ_DATA accesses to the same indexed register
without any need to write to the ADDRESS port before each
access.
The Address port is also the write destination of the initiation
key, which will be described later.
Plug and Play Registers
The Plug and Play registers may be divided into two groups:
card registers and logical device registers. According to the
Plug and Play specification, for each additional device
contained in a PnP card, there should be a corresponding copy
of the logical device register. However, because the DM9008
contains only one logical device, the card registers and logical
device registers are unique for each card. Those PnP registers
or bits not defined in the following table are all read with value
= 0.
26
Final
Version: DM9008-DS-F02
November 30, 2000
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