Hardware specifications, Performance levels, Interrupts – NCR 7458 User Manual
Page 107: Appendix b
Appendix B:
Hardware Specifications
Performance Levels
Processor
850 MHz
Celeron
1 GHz P III
System Bus
100 MHz
133 MHz
Cache
128 KB
256 KB
Interrupts
IRQ
System Resource
NMI
I/O Channel Check
0
Reserved, System Timer
1
Reserved, Keyboard buffer full
2
Reserved, Cascade interrupt
3
Serial Port 2
4
Serial Port 1
5
Serial Ports 3 & 4
6
Reserved, Floppy
7
Parallel Port 1(Avail if disable)
8
Real Time Clock
9
10
Serial Port 3
11
Serial Port 4
12
Mouse (Avail if disabled)/UPS Serial Port
13
Reserved, Math coprocessor
14
On-board IDE (Avail if IDE disabled)
15
On-board IDE (Avail if IDE disabled)
*default settings