SB Emulation in MS-DOS/ Windows 95/98 B-5
Input/Output (I/O)
Addresses
I/O addresses are communication areas used by your computer’s central processor to distinguish
among various peripheral devices connected to your system when sending or receiving data.
Interrupt Request (IRQ)
Line
An IRQ line is a signal line that a device uses to notify your computer’s central processor that it
wants to send or receive data for processing.
Table B-1:
Possible default input/output (I/O) addresses.
Device
Default I/O Address Range
SB interface
220H to 22FH
240H to 24FH
260H to 26FH
280H to 28FH
MPU-401 UART MIDI interface
300H to 301H
310H to 311H
320H to 321H
330H to 331H
Stereo music synthesizer
388H to 38BH
Table B-2:
Possible default interrupt request (IRQ) line assignment.
Device
Default IRQ Line
SB interface
5, 7, 9, 10
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