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I/O address (hex)
278 - 27F
280 - 2AB
2A0 - 2A7
2A8 - 2E7
2E8 - 2EF
2F0 - 2F7
2F8 - 2FF
300 - 31F
320 - 36F
370 - 377
378 - 37F
380 - 387
388 - 38B
38C - 3AF
3B0 - 3BB
3BC - 3BF
3C0 - 3DF
3E0 - 3E1
3E2 - 3E3
3E8 - 3EF
3F0 - 3F7
3F8 - 3FF
CF8 - CFB
CFC - CFF
System memory map specifications
Size
640 KB
128 KB
48 KB
160 KB
64 KB
15 MB
58 MB
58 MB
2 MB
4 GB
64 KB
Specifications
System function (shipping configuration)
Unused
Unused
Unused
Unused
Reserved serial port
Unused
Infrared port
Unused
Unused
Secondary diskette drive controller
Parallel port (LPT1/default)
Unused
FM synthesizer-OPL3
Unused
VGA
Reserved (parallel port/no EPP support)
VGA
PC Card controller in CPU
Unused
Internal modem
"A" diskette controller
Serial port (COM1/default)
PCI configuration index register (PCIDIVO-1)
PCI configuration data register (PCIDIVO-1)
Memory address
00000000-0009FFFF
000A0000-000BFFFF
000C0000-000CBFFF
000C8000-000E7FFF
000E8000-000FFFFF
00100000-00FFFFFF
04800000-07FFFFFF
04800000-07FFFFFF
08000000-080FFFFF
08200000-FFFEFFFF
FFFF0000-FFFFFFFF
System function
Base memory
Video memory
Video BIOS
Unused
System BIOS
Extended memory
Super extended memory
Unused
Video memory (direct access)
Unused
System BIOS
6–7
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