NEC Direction T-Series, Руководство пользователя

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Technical Information 1-5
CMOS Memory/Real-Time Clock Battery
The 430TX PCI ISA IDE Xcelerator (PIIX4) on the system board stores system
information in non-volatile CMOS memory. The chip also contains the system’s real-time
clock. Both are maintained by a 3-volt coin cell lithium battery on the system board. The
battery is replaceable.
DMA/IRQ Settings
The system automatically configures interrupts requests (IRQ), direct memory access
(DMA) channels, and other parameters when adding PCI boards with minimal user
intervention.
Table 1-3 and Table 1-4 list system IRQ and DMA default settings.
Table 1-3 Interrupt Level Assignments
IRQ System Resource
NMI I/O channel check
00 Reserved, internal timer
01 Reserved, keyboard buffer full
02 Reserved, cascade interrupt form slave PIC
03 COM2*
04 COM1*
05 LPT2 (Plug and Play option)/Audio/User available
06 Diskette drive
07 LPT1*
08 Real-time clock
09 User available
10 User available/USB
11 Windows Sound System*/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)
* Default, but can be changed.