20
GTXI User's Guide
Extended I/O Addressing (ISA Bus only)
Carrier Board
(0)
PC Board (0)
Passive Backplane
Buffer
CPU
Carrier Board
(n)
Carrier Board
(63)
PC Board (n)
PC Board (63)
Figure 1-12: PC Boards Isolation and Extended Addressing
The isolation of the CPU from instrumentation extends to the PC
board I/O address, using offset I/O address re-mapping. This makes
more I/O addresses available, increasing the number of boards
GTXI based system can use well beyond that of a conventional PC.
The GTXI’s extended I/O addressing is illustrated above.
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