Specifications
Sealevel Systems
PIO-32.PCI
Page
10
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)
API Port #
Relative Address
(function)
Port Type
A
0 ( R/W )
0 ( R )
Input Port
B
1 ( R/W )
0 ( W )
Output Port
C
2 ( R/W )
1 ( W )
Output Port
D
3 ( R/W )
1 ( R )
Input Port
Figure 3-API Port/Bit Reference