Motorola MVME2300 Series - Manual (Page 55)

ISA Local Resource Bus
http://www.motorola.com/computer/literature 1-31
1
ISA Local Resource Bus
W83C553 PIB Registers
The PIB contains ISA Bridge I/O registers for various functions. These
registers are actually accessible from the PCI bus. Refer to the W83C553
Data Book for details.
16550 UART
The 16550 UART provides the MVME2300 series boards with an
asynchronous serial port. Refer to the 16550 Data Sheet for additional
details and programming information.
The following table shows the mapping of the 16550 registers within the
MVME2300 series boards’ ISA I/O space beginning at address 0x3F8:
Table 1-16. 16550 Access Registers
ISA I/O Address Function
0000 03F8
Receiver Buffer (Read);
Transmitter Holding (Write)
0000 03F9 Interrupt Enable
0000 03FA
Interrupt Identification (Read);
FIFO Control (Write)
0000 03FB Line Control
0000 03FC MODEM control
0000 03FD Line Status
0000 03FE MODEM Status
0000 03FF Scratch