User`s guide

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Registers
3.2 I/O Address Map
All 743X series registers are 32 bits long. Users can access these registers
using 32-bit I/O instructions. The following table shows the registers
address map, including descriptions and their offset addresses relative to
the base address
Address Write Read
Base + 0x00 Isolated DO Isolated DI
PCI-7432
cPCI-7432
Base + 0x40 Clear IRQ --
CPCI-7432R/P Base + 0x04 LED Control Slot Number
Address Write Read
Base + 0x00 -- Isolated DI
Base + 0x04 -- Isolated DI
PCI-7433
cPCI-7433
cPCI-7433R
Base + 0x08 Clear IRQ --
cPCI-7433R Base + 0x50 LED Control Slot Number
Address Write Read
Base + 0x00 Isolated DO -- PCI-7434
cPCI-7434[P]
cPCI-7434R[P]
Base + 0x04 Isolated DO --
cPCI-7434R[P] Base + 0x50 LED Control Slot Number
Table 5. I/O Address Map of c/PCI-7432/33/34
Caution: 1. I/O port is 32 bits width
2. 8-bit or 16-bit I/O access is not allowed.