User`s manual

Technical Reference
Intellio C320Turbo/PCI A-5
PCI
The 32-bit Intellio C320Turbo/PCI board complies with PCI Spec. 2.1. Hardware
configuration for IRQ and Memory addresses is automatically assigned by PCI
BIOS. Hence, it is a must to have the board plugged first before installing software
driver.
Unlike ISA slots, different PCI slots in the same PC may have different bus numbers
and device numbers with respect to PCI specifications. The same PCI board will
have different system configurations if switched to a different PCI slot, which may
be called slot-sensitive or slot-dependent. This may also apply to PCI slots in PC of
different mother board, which may use different device number set. For example,
some use 17, 18, 19, and 20 for identifying the respective PCI slot but some use 11,
12, 13 and 14.
Due to the slot-dependency, it is necessary to re-configure the software driver
once the board is plugged in different PCI slots.
Up to four boards of Intellio C320Turbo/PCI are allowed in a system. When
installing multiple boards, please do keep in mind the order you plug the boards
for distinguishing the boards installed.
Dual-Ported RAM
There is 512 KB of dual-ported DRAM on the Intellio C320Turbo/PCI Control
Board, which is used as a data buffer and memory map device for the motherboard.
it is called “dual-ported” because it is accessed by both motherboard CPU and the
Intellio C320Turbo/PCI Control Board’s on-board CPU. Generally speaking, the
memory access time is much faster than normal I/O access.
All messages and data are transferred through this 512 KB dual-ported memory. The
buffer area appears as normal 16-bit memory to the PC AT I/O channel.
Every Intellio C320Turbo/PCI Control Board only occupies 16 KB of memory
space (window) from the system point of view. Memory base addresses range from 1
M to 4 GB.