Texas Instruments EXTENSA 570CD User Manual
Page 42
Table 4-2 DMA Channels
Controller
Channel
Address
Function
1
0
0087
Spare
1
1
0083
Spare
1
2
0081
Diskette
1
3
0082
Spare
2
4
Cascade
Cascade
2
5
008B
Spare
2
6
0089
Spare
2
7
008A
Spare
Table 4-3 IRQ Interrupt Levels
Priority
Interrupt
Number
Interrupt Source
1
SMI
Power management unit
2
NMI
Parity Error Detected, I/O Channel Error
3
IRQ0
Interval Timer, Counter 0 Output
4
IRQ1
Keyboard
IRQ 2
Interrupt from controller 2 (cascade)
5
IRQ8
Real Time Clock
6
IRQ 9
Cascaded to INT 0AH (IRQ 2)
7
IRQ10
Reserved
8
IRQ 11
Reserved
9
IRQ 12
PS/2 Mouse
10
IRQ13
INT from Coprocessor
11
IRQ14
Hard Disk Controller
12
IRQ15
Reserved
13
IRQ3
Serial Comm Port 2
14
IRQ4
Serial Comm Port 1
15
IRQ5
Reserved
16
IRQ6
Diskette Controller
4-4 Theory of Operation