Interrupt Requests; I/O Port Address; Table B - 1: Interrupt Requests; Table B - 2: I/O Port Address - NEC Express 5800 120Eg User Manual

Appendix B
The factory-set interrupt requests and I/O port addresses are listed below. Find an
appropriate one to install an optional device.

Interrupt Requests

The factory-set IRQs are assigned as follows:
IRQ
0
1
2
3
4
5
6
7

I/O Port Address

The factory-set I/O port addresses for the server are assigned as follows:
Address*
00 - 1F
20 - 21
2E - 2F
40 - 43
60
61
64
70 - 71
80 - 8F
A0 - A1
C0 - DF
E0 - E9
F0
F1 - FF
170 - 177 or BAR2
1E8 - 1EF
1F0 - 1F7 or BAR0
120Eg User Guide - Appendix B

Table B - 1: Interrupt Requests

Peripheral Device
(Controller)
System timer
Keyboard
Cascaded connection
COM B
COM A
PCI
Floppy disk
LPT1 parallel port

Table B - 2: I/O Port Address

Chip in Use
8-bit DMA control register
Master 8259 programming interface
Configuration
8254 programming interface
Keyboard & mouse
NMI status register
Keyboard & mouse
NMI enable register/real-time clock
16-bit DMA control register
Slave 8259 programming interface
DMA controller page register
Base address register
Register IRQ13
Logical device configuration
EDMA2-compatible mode primary command block register
EDMA2-compatible mode tertiary command block register
EDMA2-compatible mode secondary command block register
IRQ Peripheral Device
(Controller)
8 Real-time clock
9 PCI/SCI
10 PCI
11 Third IDE
12 Mouse
13 Numeric processor
14 Primary IDE
15 Secondary IDE
B - 1