Memory Addresses - Intergraph StudioZ RenderRAX III System Setup

78
I/O Address (hex)
03F0–03F5
03F6
03F7 write
03F7 bit7 read
03F7 bit0:6 read
03F8–03FF
0CF8–0CFB
0CFC–0CFF
FF00–FF07
FFA0–FFA7
FFA8–FFAF

Memory Addresses

Memory Address
0K–512K
512K–640K
640K–768K
768K–896K
896K–1024K
1024K–15360K
15.36M–16.384M
16.384M–
Top of memory
16.384M–
1048.576M
1G–(4G–20M)
(4G–20M)–
(4G–19M)
(4G–19M)–
(4G–18M)
(4G–18M)–
(4G–17M)
Size Assignment
5 bytes Floppy drive channel 1
1 byte Primary IDE channel command
1 byte Floppy drive channel 1 command
1 bit Floppy drive channel 1 disk change status
7 bits Primary IDE channel status
8 bytes COM 1
4 bytes PCI configuration address registers (DW access)
4 bytes PCI configuration data registers
8 bytes IDE bus master registers
8 bytes Primary IDE bus master registers
8 bytes Secondary IDE bus master registers
Range
00000000–0007FFFF
00080000–0009FFFF
000A0000–000BFFFF
000C0000–000DFFFF
000E0000–000FFFFF
00100000–00EFFFFF
00F00000–00FFFFFF
01000000–
Top of memory
01000000–3FFFFFFF
04000000–FEBFFFFF
FEC00000–FECFFFFF
FED00000–FEDFFFFF
FEE00000–FEEFFFFF
Size Description
512K DOS conventional memory
128K DOS conventional memory
or memory hole
128K VGA memory and BIOS
128K Expansion card BIOS and
buffer
128K System BIOS
15.36M Main memory
1024K ISA memory hole (optional)
xxxx Main memory
1032.192M Maximum allowable
memory
(3G–20M) PCI/AGP memory
1024K APIC configuration space
1025K PCI/AGP memory
1024K APIC configuration space