Toshiba TMPR4925 Manual page 272

Figure 10.3.6 and Figure 10.3.7 illustrate this address conversion.
31
PCIAddr
Compare
31
PBASE
31
000
AM
31
GBASE
31
GBusAddr
Figure 10.3.6 Memory Address Conversion for Target (PCI Bus → G-Bus Address Conversion)
31
PCIAddr
31
PBASE
31
AM
31
GBASE
31
GBusAddr
Figure 10.3.7 I/O Address Conversion for Target (PCI Bus → G-Bus Address Conversion)
20 19
29 28 20 19
0 0 - - - 0 1 1 - - - 1
20 19
Compare
16 15
0 0 - - - 0 1 1 - - - 1
0x0000
10-12
Chapter 10 PCI Controller
0
0
0x00000
0
0x00000
0
0x00000
0
0
8 7 0
0x00
8 7 0
0x00
8 7 0
0x00
0