B.3 Irq Lines - Teknor Industrial Computers VIPer 821 Technical Reference Manual

VIPer 821 - Technical Reference Manual
B.3 IRQ LINES
The board is fully PC compatible with interrupt steering for PCI plug and play
compatibility.
Controller # 1
IRQ 0 Timer Output 0
IRQ 1 Keyboard (Output Buffer Full)
IRQ 2 Cascade Controller # 2
IRQ 3 Serial Port 2 *
IRQ 4 Serial Port 1 *
IRQ 5 Parallel Port 2 *
IRQ 6 Floppy Controller *
IRQ 7 Parallel Port 1 * or Available
* All functions marked with an asterisk (*) can be disabled or reconfigured.
1
Available lines service on board and external PCI/ISA PnP devices or a Legacy ISA device.
B.4 DMA CHANNELS
The board provides 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
IRQ 9
IRQ 10
IRQ 11
IRQ 12
IRQ 13
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-2
Real-Time Clock
1
Available
1
Available
1
Available
PS/2 Mouse
Coprocessor Error
1
1