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Product Data and Memory Maps
1
Notes
1. Programmable via Hawk ASIC
2. The actual PowerPlus II size of each ROM/FLASH bank may vary.
3. The first 1MB of ROM/FLASH Bank A appears at this range after
a reset if the rom_b_rv control bit is cleared. If the rom_b_rv control
bit is set this address maps to ROM/FLASH Ban k B.
4. The only method to generate a PCI Interrupt Acknowledge cycle
(8259 IACK) is to perform a read access to the Hawks PIACK
Register at 0xFEFF0030.
5. VME should be placed at toe top of PCI memory space.
Table 1-3. Suggested CHRP Memory Map
Processor Address Size Definition Notes
Start En d
0000 0000 top_dram dram_size System Memory (onboard DRAM) 1
top_dram F3FF FFFF 4G-dram_size PCI Memory Space 1, 5
F400 0000 F7FF FFFF 64MB FLASH Bank A (optional) 1, 2
F800 0000 FBFF FFFF 64MB FLASH Bank B (optional) 1, 2
FC00 0000 FDFF FFFF 32MB Reserved
FE00 0000 FE7F FFFF 8MB PCI/ISA I/O Space 1
FE80 0000 FEF7 FFFF 7.5MB Reserved
FEF8 0000 FEF8 FFFF 64KB System Memory Co ntroller Registers
FEF9 0000 FEFE FFFF 384KB Reserved
FEFF 0000 FEFF FFFF 64KB Processor Host Bridge Re gisters 4
FF00 0000 FF7 F FF FF 8MB FLASH Bank A (pre f erred) 1, 2
FF80 0000 FF8 F FFFF 1MB FLASH Ba n k B (preferred) 1, 2
FF90 0000 FFE F FFFF 6MB Reserved
FFF0 0000 FFFF FFFF 1MB Boot ROM 3