0 register map, 1 register map overview – Measurement Computing PCI-COM232 User Manual
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4.0
REGISTER MAP
Although most users will take advantage of the COM driver supplied with the PCI-COM232 boards, the
following register map (Table 4-1) has information for users that may require it.
4.1
Register Map Overview
Table 4-1 Register Map
REGISTER
READ FUNCTION
WRITE FUNCTION
Operations
BADR1+4C h
Interrupt Status
Interrupt Control
32-bit dbl word
BADR2 + 0
Port 1 UART
Port 1 UART
8-bit byte
BADR2 + 1
Port 1 UART
Port 1 UART
8-bit byte
BADR2 + 2
Port 1 UART
Port 1 UART
8-bit byte
BADR2 + 3
Port 1 UART
Port 1 UART
8-bit byte
BADR2 + 4
Port 1 UART
Port 1 UART
8-bit byte
BADR2 + 5
Port 1 UART
Port 1 UART
8-bit byte
BADR2 + 6
Port 1 UART
Port 1 UART
8-bit byte
BADR2 + 7
Port 1 Clock Sel Register
Interrupt Status Register
8-bit byte
BADR3 + 0
Port 2 UART
Port 2 UART
8-bit byte
BADR3 + 1
Port 2 UART
Port 2 UART
8-bit byte
BADR3 + 2
Port 2 UART
Port 2 UART
8-bit byte
BADR3 + 3
Port 2 UART
Port 2 UART
8-bit byte
BADR3 + 4
Port 2 UART
Port 2 UART
8-bit byte
BADR3 + 5
Port 2 UART
Port 2 UART
8-bit byte
BADR3 + 6
Port 2 UART
Port 2 UART
8-bit byte
BADR3 + 7
Port 2 Clock Sel Register
Interrupt Status Register
8-bit byte
BADR4 + 0
Port 3 UART
Port 3 UART
8-bit byte
BADR4 + 1
Port 3 UART
Port 3 UART
8-bit byte
BADR4 + 2
Port 3 UART
Port 3 UART
8-bit byte
BADR4 + 3
Port 3 UART
Port 3 UART
8-bit byte
BADR4 + 4
Port 3 UART
Port 3 UART
8-bit byte
BADR4 + 5
Port 3 UART
Port 3 UART
8-bit byte
BADR4 + 6
Port 3 UART
Port 3 UART
8-bit byte
BADR4 + 7
Port 3 Clock Sel Register
Interrupt Status Register
8-bit byte
BADR5 + 0
Port 4 UART
Port 4 UART
8-bit byte
BADR5 + 1
Port 4 UART
Port 4 UART
8-bit byte
BADR5 + 2
Port 4 UART
Port 4 UART
8-bit byte
BADR5 + 3
Port 4 UART
Port 4 UART
8-bit byte
BADR5 + 4
Port 4 UART
Port 4 UART
8-bit byte
BADR5 + 5
Port 4 UART
Port 4 UART
8-bit byte
BADR5 + 6
Port 4 UART
Port 4 UART
8-bit byte
BADR5 + 7
Port 4 Clock Sel Register
Interrupt Status Register
8-bit byte
The single port PCI-COM232 board utilizes only Address range 1 and 2. The PCI-COM232/2 uses
Address range 1, 2 and 3 while the PCI-COM232/4 uses Address range 1 through 5.