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ErgoPro m664 PC Specialist's Handbook
Page 9-10 Edition 1 - Release 1 - March 1998
I/O addresses
The I/O address map is shown below. The hexadecimal addresses 0000 to 00FF are reserved for the system
board I/O. The addresses hex 0100 through 03FF are available for the I/O channel. Additional addresses are
allocated for the TokenRing adapter boards, and serial ports COM3 and COM4.
System board addresses 0000 to 00FF
Hex range Device
0000 - 000F
PIIX4 - DMA controller 1, slave
0020 - 0021
PIIX4 - Interrupt controller 1, master
002E - 002F
Super I/O contorller - configuration registers
0040 - 0043
PIIX4 - Timer/Counter 1
0048 - 004B
PIIX4 - Timer/Counter 2
0060
Keyboard controller - Reset IRQ
0061
PIIX4 - NMI, Speaker control
0064
Keyboard controller - CMD/STAT byte
0070, bits 6:0
PIIX4 - Real-time clock, address
0070, bit 7
PIIX4 - enable NMI
0071
PIIX4 - Real-time clock, data
0078 - 0079
Reserved - system board configuration
0080 - 008F
PIIX4 - DMA page registers
00A0 - 00A1
PIIX4 - Interrupt controller 2, slave
00B2 - 00B3
APM control
00C0- 00DE
PIIX4 - DMA controller 2, master
00F0
Reset numeric error
I/O channel addresses 0100 to 03FF
Hex range Device
0120 - 0127
Creative audio (PnP ISA) by default
0170 - 0177
Secondary IDE interface
01F0 - 01F7
Primary IDE interface
0200 - 0207
Joystick in Creative Vibra 16XV audio PnP ISA add-on board
0220 - 022F
Creative Vibra 16XV audio (PnP ISA) by default
0228 - 022F
Parallel port 3 (LPT 3)
0240 - 024F
Creative Vibra 16XV audio (PnP ISA), alternative
0260 - 026F
Creative Vibra 16XV audio (PnP ISA), alternative
0278 - 027B
Parallel port 2 (LPT 2)
0278 - 027F
Parallel port 2 (LPT 2), EPP mode
0280 - 028F
Creative Vibra 16XV audio (PnP ISA), alternative
0290 - 0297
Management extension hardware
02E8 - 02EB
Serial port 4 (COM4)
02F8 - 02FF
Serial port 2 (COM2)