Memory Maps
MVME162/D2 3-5
3
5. The EPROM and Flash are sized by the MCchip ASIC from an
8-bit private bus to the 32-bit MPU local bus. Because the
device size is less than the allocated memory map for some
entries, the device contents repeat for those entries.
If jumper GPIO3 is installed, the Flash device is accessed. If
GPIO3 is not installed, the EPROM is accessed.
6. The Flash and EPROM are sized by the MCchip ASIC from an
8-bit private bus to the 32-bit MPU local bus. Because the
device size is less than the allocated memory map for some
entries, the device contents repeat for those entries.
If jumper GPIO3 is installed, the PROM device is accessed. If
GPIO3 is not installed, the Flash is accessed.
7. These areas are not decoded unless one of the programmable
decoders are initialized to decode this space. If they are not
decoded, an access to this address range will generate a local
bus timeout. The local bus timer must be enabled.
Table 3-2 focuses on the ‘‘Local I/O Devices’’ portion of the local bus main
memory map.
Table 3-2. Local I/O Devices Memory Map
Address Range Devices Accessed Port Width Size Notes
$FFF00000 - $FFF3FFFF Reserved - - 256 KB 4
$FFF40000 - $FFF400FF VMEchip2 (LCSR) D32 256 B 1, 3
$FFF40100 - $FFF401FF VMEchip2 (GCSR) D32-D8 256 B 1, 3
$FFF40200 - $FFF40FFF Reserved - - 3.5 KB 4, 5
$FFF41000 - $FFF41FFF Reserved - - 4 KB 4
$FFF42000 - $FFF42FFF MCchip D32-D8 4 KB 1
$FFF43000 - $FFF44FFF Reserved - - 8 KB 4
$FFF45000 - $FFF45800 SCC #1 (Z85230) D8 2 KB 1, 2
$FFF45801 - $FFF45FFF SCC #2 (Z85230) D8 2 KB 1, 2
$FFF46000 - $FFF46FFF LAN (82596CA) D32 4 KB 1, 6
$FFF47000 - $FFF47FFF SCSI (53C710) D32-D8 4 KB 1
$FFF48000 - $FFF57FFF Reserved - - 64 KB 4
$FFF58000 - $FFF5807F IPIC IP_a I/O D16 128 B 1
$FFF58080 - $FFF580FF IPIC IP_a ID D16 128 B 1
$FFF58100 - $FFF5817F IPIC IP_b I/O D16 128 B 1
$FFF58180 - $FFF581FF IPIC IP_b ID Read D16 128 B 1
$FFF58200 - $FFF5827F IPIC IP_c I/O D16 128 B 1
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