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Port Addressing
Figures 3 and 4 show the API Port/bit reference numbers for Absolute and
Relative Addressing
R = Read
W = Write
R/W = Read or Write
Port
API Port # Absolute
Address (function)
A
0 ( R/W )
B
1 ( R/W )
C
2 ( R/W )
D
3 ( R/W )
Figure 3-API Port/Bit Reference
Sealevel Systems PIO-32.PCI
API Port #
Port Type
Relative Address
(function)
0 ( R )
Input Port
0 ( W )
Output Port
1 ( W )
Output Port
1 ( R )
Input Port
Specifications
Page 10
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