NCR 7458 - Manual (Page 107)

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