Motorola MVME162FX Programmer's Reference Manual page 289

I/O and ID Space Accesses
The following table shows the data routing when accessing IP I/O
or ID space.
SPACE refers to the IndustryPack space being accessed.
LBSIZE refers to local bus transfer size.
LBA refers to local bus address signals 1,0.
IPA refers to IndustryPack address signals 2,1,0.
LD refers to the local data bus.
IPXD refers to the IP_a data bus (IPAD) when accessing IP_a or
IP_c. It refers to the IP_b data bus (IPBD) when accessing IP_b or
IP_d.
SPACE LBSIZE
BYTE
IP_a,b,c or _d
(I/O or ID)
WORD
LWORD
BYTE
IP_ab or _cd
(I/O Only)
WORD
LWORD
LBA IPA LD<31-24>
0 0 IPXD<15-8>
1
1
2
2
3
3
0 0 IPXD<15-8>
2
2
0 0 IPXD<15-8>
0 0 IPBD<15-8>
1
1
0
2
1
3
0 0 IPBD<15-8>
2
0
0 0 IPBD<15-8>
IP to Local Bus Data Routing
LD<23-16> LD<15-8>
IPXD<7-0>
IPXD<15-8>
IPXD<7-0>
IPXD<15-8>
IPXD<7-0>
IPBD<7-0>
IPAD<15-8>
IPBD<7-0>
IPAD<15-8>
IPBD<7-0> IPAD<15-8>
4
LD<7-0>
IPXD<7-0>
IPXD<7-0>
IPAD<7-0>
IPAD<7-0>
IPAD<7-0>
4-55