Parallel Port - Motorola MVME1603 Installation And Use Manual

Functional Description
Hardware initializes the two serial ports as COM1 and COM2 with ISA
I/O base addresses of $3F8 and $2F8 respectively. This default
configuration also assigns COM1 to IBC (ISA/PCI Bridge Controller)
interrupt request line IRQ4 and COM2 to IRQ3. You can change the
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default configuration by reprogramming the ISASIO device. For detailed
programming information, refer to the PCI and ISA bus discussions in the
MVME1603/MVME1604 Programmer's Reference Guide and to the
vendor documentation for the ISASIO device.

Parallel Port

The parallel port is an IEEE P1284 printer interface implemented with the
ISASIO device. All parallel I/O interface signals are routed to P2 through
series damping resistors.
Hardware initializes the parallel port as PPT1 with an ISA IO base address
of $3BC. This default configuration also assigns the parallel port to IBC
(ISA/PCI Bridge Controller) interrupt request line IRQ7. You can change
the default configuration by reprogramming the ISASIO device. For
detailed programming information, refer to the PCI and ISA bus
discussions in the MVME1603/MVME1604 Programmer's Reference
Guide and to the vendor documentation for the ISASIO device.
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