Memory Maps

1-29

1
I/O space must be marked cache inhibit and serialized in its page table. Table 1-5 on page 1-31 further defines the map for the local I/O devices.Table 1-4. Local Bus Memory Map
Address Range Devices
Accessed
Port
Width Size
Software
Cache
Inhibit
Notes
Programmable DRAM on parity
mezzanine
D32 4MB-16MB N 2
Programmable DRAM on ECC
mezzanine
D32 4MB-32MB N 2
Programmable Onboard SRAM D32 128KB N 2
Programmable VMEbus
A32/A24
D32-D16 -- ? 4
Programmable IP_a memory D32-D8 64KB-8MB ? 2, 4
Programmable IP_b memory D32-D8 64KB-8MB ? 2, 4
$FF800000-$FF9FFFFF Flash/EPROM D32 2MB N 1, 5
$FFA00000-$FFBFFFFF EPROM/Flash D32 2MB N 5
$FFC00000-$FFDFFFFF Not decoded D32 2MB N
$FFE00000-$FFE1FFFF Onboard SRAM
default
D32 128KB N