
ÉlanSC310 Microcontroller Evaluation Board User’s Manual
4-12
1.
0
Table 4-4. Typical Full ISA IRQ Mapping
NOTE:
1. IRQ lines 3, 4, 5, 6, 7, 9, 10, 11, 12, 14 and 15 are available on the ISA bus.
Care must be taken so that cards on the ISA bus do not use interrupts that
conflict with internal ÉlanSC310 devices or each other.
IRQ Device Assigned
Special Notes
15
Available for ISA bus
14
Connected to IDE interface
13
Reserved
12
Available for ISA bus
11
Available for ISA bus
10
Available for ISA bus
9
Available for ISA bus
8
ÉlanSC310 internal RTC interrupt
7
ÉlanSC310 internal parallel port
6
Super I/O floppy drive controller
5
Available for ISA bus
4
Internal serial port; COM1
3
Connected to Super I/O for COM2
Connects to IRQ3 pin on Super
I/O
2
Used to cascade to Slave PIC (8259)
1
Keyboard buffer full (driven by 8042)
0
Timer 0 output (internal to ÉlanSC310)
Typically used for DOS Clock
evalbd.book : ch4 Page 12 Thursday, August 8, 1996 2:34 PM