Birq And Dma Lines; Irq Lines; Dma Channels - Kontron PCI-946-1 Technical Reference Manual

B IRQ AND DMA LINES
B.1 IRQ LINES
The board is fully PC compatible with interrupt steering for PCI plug and play
compatibility.
1 Available lines service on board and external PCI/ISA PnP devices or a Legacy ISA device.
B.2 DMA CHANNELS
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Controller # 1
IRQ 0 Timer Output 0
IRQ 1 Keyboard
IRQ 2 Cascade Controller # 2
IRQ 3* Serial Port 2
IRQ 4* Serial Port 1
IRQ 5* Available
IRQ 6* Floppy Controller
IRQ 7* Parallel Port 1 or Available
* :All functions marked with an asterisk (*) can be disabled or reconfigured.
The PCI-946-1 and P3S440BX integrate the functionality of two 8237 DMA
controllers. Eight DMA channels are available.
According to Plug and Play standards, the system BIOS automatically allocates DMA
Channel 1 or 3 for the parallel port's ECP mode. Channel 2 is reserved for the floppy
controller and Channel 4 is used to cascade Channels 0 through 7 to the
microprocessor.
DMA Channel
DMA 0
DMA 1
DMA 2
DMA 3
DMA 4
DMA 5
DMA 6
DMA 7
Controller # 2
IRQ 8 Real-Time Clock
IRQ 9
IRQ 10
IRQ 11
IRQ 12
1
IRQ 13 Coprocessor Error
IRQ 14 Primary IDE or available
1
IRQ 15 Secondary IDE * or available
Function
Available
PnP available (ECP)
Floppy controller
PnP available (ECP)
Cascade controller # 1
PnP available
PnP available
PnP available
B-3
BIOS Setup Error Codes
1
Available
1
Available
1
Available
PS/2 Mouse
1
1