18
GTXI User's Guide
The number of ISA or PCI boards that may be placed in a GT7700
varies. The chassis itself has three PCI slots, one PCI/ISA slot, and
seven ISA slots. The embedded controller has one PCI slot, one
PCI/ISA slot, and one ISA slot. Thus, a single GT7700 can
accommodate a maximum of six PCI cards with eight ISA cards or
a maximum of ten ISA cards with four PCI cards.
Slots 4 & 5 – Shared PCI/ISA (one actual slot)
Slot 1
Slot 11
Slot 12
System
Controller
Module
Figure 1-10: GT7700 Slot Numbers
ISA Bus Isolation
The GTXI’s instrumentation platform ISA bus is completely
buffered, providing isolation between the boards and between the
controller and the boards. When the GTXI-700 is used as a stand-
alone PC with a GTPC-7586 controller module (see Figure 1-11), a
buffer board on the right side of the controller module provides the
isolation.
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