Interphase Tech 4538 - Manual (Page 44)

The PCI Bridge
22 Interphase Corporation
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A PowerSpan PCI-to-Local window must have been enabled in the I²C serial
EEPROM, in order to allow the CompactPCI host to detect it at system power-on or
after the “Hot Swap insertion” of the board and to map it in the PCI space. The
corresponding PowerSpan register “PCI Target Image Control Register” must also
have been initialized with the “Image Enable” bit set (IMG_EN=1) and the address
translation mechanism enabled (TA_EN=1).
Figure 1-4 on page 23 illustrates the PCI-to-Local window mechanism.