Integrated Functions (Continued)
Physical Address Map
FFFFFFFFh (4 GB)
MAX
ROM Access
(256 KB)
FFFC0000h
PCI Access
GX_BASE+8800000h
Graphics Memory
(Frame Buffer, etc.)
GX_BASE+800000h
SMM System Code
GX_BASE+400000h
GX_BASE+9000h
Power Management Registers
(See Table 5-1 on page 181)
GX_BASE+8500h
GX_BASE+8400h
GX_BASE+8300h
Memory Controller Registers
(See Table 4-14 on page 112)
DRAM Map
FFFF FFFFh
MAX
Display Controller Registers
(See Table 4-28 on page 141)
Graphics Memory
(Frame Buffer, etc.)
Graphics Pipeline Registers
(See Table 4-23 on page 129)
GX_BASE+8100h
GX_BASE+8000h
GX_BASE+1000h
Internal Bus IF Unit Registers
(See Table 4-8 on page 104)
PCI Access
Available to the system
Scratchpad RAM
(See Table 4-3 on page 100)
GX_BASE
PCI Access
Available to the system
*GBADD or Top of DRAM
Extended Memory
100000h (1 MB)
*Top of DRAM
Extended Memory
System BIOS
Shadowed System BIOS
E8000h
Shadowed Video BIOS
100000h (1 MB)
E8000h
E0000h
UMBs and
Expansion ROMs
Video BIOS
C0000h
E0000h
C0000h
UMBs and Expansion ROMs
VGA/MDA
Frame Buffers
SMM System Code
(Soft VGA and/or PCA/ISA)
A0000h (640 KB)
Conventional Memory
0h
A0000h (640 KB)
0h
Conventional Memory
* See BC_DRAM_TOP in Table 4-8 on page 104 or MC_GBASE_ADD in Table 4-15 on page 116.
Figure 4-2. GXLV Processor Memory Space
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