ErgoPro e-, x- and s- Series
PC Specialist's Handbook
Page 88
First Edition, Release 4 - June 1998
I/O addresses
The I/O address map is shown below. The hexadecimal addresses 000 to 0FF are reserved for the system board
I/O. The addresses hex 100 through 3FF are available for the I/O channel. Additional addresses are allocated for
the TokenRing adapter boards, and serial ports COM3 and COM4.
Bold italics indicate I/O addresses that are used in the basic configuration, including the VGA Display adapter
board, the IDE interface, and the SCSI Mass storage adapter board.
System board addresses 000 to 0FF
Hex range
Device
000 - 00F
DMA controller 1, slave
020 - 021
Interrupt controller 1, master
022, 024
Chip set configuration registers
040 - 043
Timer/Counter 1
060 , 064
Keyboard controller
061
Test register
070 - 071
Real-time clock, CMOS RAM
080 - 08F
DMA page registers
0A0 - 0A1
Interrupt controller 2, slave
0C0- 0DF
DMA controller 2, master
0F0
Clear Math co-processor busy
0F1
Reset Math co-processor
0F8 - 0FF
Math co-processor
I/O channel addresses 100 to 3FF
Hex range
Device
102
ErgoGrafix
120 - 121
ICL config. registers by default
130 - 131
Alternative for ICL config. registers
140 - 141
Alternative for ICL config. registers
170 - 177
Secondary IDE interface
1CE - 1CF
ErgoGrafix 422i (when PCI MACH64 I/O reloc is disabled (RSU))
1F0 - 1F7
Primary IDE interface
200 - 207
Aztech audio (xs-series)
220 - 22F
On-board audio interface (10 bit decoding)
Aztech audio (xs-series, Sound Blaster compatibility module)
240 - 24F
Alternative for audio interface
(10 bit decoding)
278 - 27B
Parallel port 2 (LPT 2)
278 - 27F
Parallel port 2 (LPT 2), EPP mode
280 - 29F
On-board Ethernet (alternative)
2A0 - 2BF
On-board Ethernet (alternative)
2CE - 2EF
ErgoGrafix 422i (when PCI MACH64 I/O reloc is disabled (RSU))
2F8 - 2FF
Serial port 2 (COM2)
300 - 301
Aztech audio (xs-series, MIDI (MPU401) module)
378 - 37B
Parallel port 1 (LPT1)