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TD-225
IRQ
System Resource
0
Reserved (interval timer)
1
Reserved (keyboard)
2
Reserved (interrupt controller)
3
Serial port COM2 (default)
4
Serial port COM1 (default)
5
Open
6
Floppy disk controller
7
Parallel port LPT1 (default)
Direct Memory Access (DMA) Channels
TD-22, TD-25
Channel
0
1
2
3
TD-220
Channel
0
1
2
3
TD-225
Channel
0
1
2
3
Assignment
Open
Audio
Floppy disk controller
Open
Assignment
Open
Open
Floppy disk controller
Audio or parallel port (ECC/EPP)
Assignment
Open
Open
Floppy disk controller
Open
IRQ
System Resource
8
Real time clock
9
Open / PIRQ mapping
10
Open
11
Open
12
PS/2 mouse port
13
Reserved (math coprocessor)
14
Primary IDE controller or open
15
Secondary IDE controller or open
Channel
Assignment
4
DMA controller
5
Open
6
Open
7
Open
Channel
Assignment
4
Reserved (cascade channel)
5
Open
6
Open
7
Open
Channel
Assignment
4
DMA controller
5
Open
6
Open
7
Open
69
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