S y s t e m m o t h e r b o a r d
LS700 HANDBOOK 3/21
DMA Channels
DMA
Data Width
System Resource
0
8- or 16-bits
Audio if present, else parallel port
1
8- or 16-bits
Audio if present, else available
2
8- or 16-bits
Floppy drive
3
8- or 16-bits
Audio if present, else parallel port (for ECP/EPP
configuration)
4
16-bits
Reserved - Cascade Channel
5
16-bits
Available
6
16-bits
Available
7
16-bits
Available
Interrupts
IRQ
System Resource
NMI
I/O channel check
0
Reserved, interval timer
1
Reserved, keyboard buffer full
2
Reserved, cascade interrupt from slave PIC
3
Serial Port 2
4
Serial Port 1
5
Parallel Port 2
6
Floppy drive
7
Parallel Port 1
8
Real-time clock
9
User available
10
User available
11
Audio if present, else user available
12
Onboard mouse port if present, else user available
13
Reserved, math coprocessor
14
Primary IDE if present, else user available
15
Secondary IDE if present, else user available
