參數(shù)資料
型號(hào): MX98905B
廠商: Electronic Theatre Controls, Inc.
英文描述: The MX98905 is designed for easy implementation of CSMA/CD local area networks,
中文描述: 該MX98905是專(zhuān)為易于實(shí)現(xiàn)的多址/光盤(pán)局域網(wǎng),
文件頁(yè)數(shù): 37/86頁(yè)
文件大?。?/td> 352K
代理商: MX98905B
37
P/N: PM0365
REV. 1.3, NOV 20 ,1995
MX98905B
SYMBOL
MULTI
BIT
D6
DESCRIPTION
Enable Multiple LAN card Auto Configuration
0 : Disable consecutive 4 writes to port 378H (SID buffer) .
1 : The MX98905 will be forced to I/O map, i.e. MEMIO of CA will be forced
to zero. Consecutive 4 writes to port 378H will be enabled. When a 0 is
written to this bit, the MX98905 will change to its original mode (I/O or
memory).
Reserved. Power on low.
RESVD
D7
Note : HCMR can always be accessed by writing to
port 278H and 378H(follow the certain sequence de-
scribed above). Remember not to access this register
through direct IO access unitl a conflict _free I/O base
is found.
2.2 HIDDEN CONFIGURATION REGISTER (R/W) (HCFR)
This register controls all the functions provided in
enhanced mode. It can always be accessed by con-
secutive 2 writes to port 278H, followed by 2
consecutive 2 writes to port 378H, i.e., write ports :
278H
278H
378H
378H (when I/O Base not
sure)
After the I/O base is determined (see functional de-
scription), this register can be accessed by one I/O
instruction using the address assignment shown in
provious section.
NOTE:
Don't write this register through Base+0AH/
Base+1AH (I/O/MEM) except it is confirmed that I/O
base does not conflict with other ADD_on card.
IOBEN
PAGE
NEWCF
LOCKE
0
1
2
3
4
x
5
x
6
x
7
x
Bits
HIDDEN COMMAND REGISTER (R/W) (HCMR)(Continued)
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