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E. 4 CORPIGURA!'IOR PORT OF 'I'D 8M UNIT
An EM board currently sold on the market has a configuration
switch for I/O address setting.
In the Tl200 system, configuration of the EM unit is
executed by setting the ports OEEH and OEFH as the index
register and data register for each.
Definition of these two registers are as follows;
TABLE E-2
Index/Data Registers and Bit Assignment
of the EMC Register
I~
Index Address
Data Register
Write
Read
50
EM Conf. Reg. - 0
of-
EM
51
EM Conf. Reg. - 1
of-
Write
Read
EM
bit-7
-
EMU
10
bit -3
-6
"
-2
Conf.
-
"
-1
Reg.-O
-5
-
"
-0
-4
-
-3
EMU Port bit-3
of-
-2
"
-2
of-
-1
"
-1
of-
-0
"
-0
of-
bit-7
Block SEL2
EM
-
Block SEL 1
Conf.
-6
-
Block SELO
Reg.- 1
-5
-
of-
-4
Hard RAM bit-4
of-
-3
"
-3
+-
-2
"
-2
+-
-1
"
-1
+-
-0
"
-0
Note:
Configuration registers I and 2 are both reset
to "0" when power is on.
E - 7
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